L

Labella. - Liplets; a pair of tumid lobes, often corrugated and capable of tension and relaxation, which terminate the theca. (L. labium, lip.)

Labellum. - The lower lip, the labium. (L. a lip.)

Labial. - Pertaining to the lips. (L. labium.)

Labial nerves. - [See Nervi labii.]

Labial palpi, Labipalpi. - Jointed feelers borne by the labium. (L. labium, and palpare, palpari, to feel.)

Labium. - The underlip, which is that organ that assists in the closing of the orifice of the mouth from below. It is formed by the second maxillæ fusing together, and consists of two parts, the mentum and the lingula. (L. the lip.)

Labium-hypopharynx. - In the male Anopheles (A. maculipennis) the hypopharynx is fused with the labium, hence the term.

Labium superius. - (L. labium and supero above.) See Labrum.

Labrum. - The upper lip, a somewhat convex corneous plate which is united posteriorly by a membranous hinge with the clypeus. (L.)

Labrum-epipharynx. - In the mouth parts of the mosquito, some anatomists maintain that the labrum and epipharynx are combined, and the term is used by those believing in this theory. The term used to differentiate between the epipharynx of Diptera and the double organ of Lepidoptera.

Lacinia. - The inner portion of the endopodite; the blade of the maxilla, being the fourth, or apical portion. (L. the lappet.) See Blade.

Laciniæ. - The second pair of appendages comprising with the volsellæ, the median pair of genital appendages. (L. the lappets.)

Laciniæ Exteriores. - Two elongate, flattened or concave biarticulate valves situated on the tongues of the members of the family Apidæ, and which support the labial palpi. They are distinguished from the labial palpi by being flat instead of cylindrical. (L.)

Laciniæ Interiores. - Two inarticulate membranaceous valves, which embrace the tongue at its entrance into the tube, seen in the family Apidæ. (L.)

Laciniate. - Divided into stripes. (L. lacinia.)

Laciniated. - Cut into irregular segments; jagged. (L. lacinia.)

Lactescent. - Yielding or secreting a milky fluid. (L. lactescens, from lac, milk.)

Lacteus. - Of a shining white or milky colour. (L. lac, milk.)

Lacuna. - A pit, a gap, a void space. (L.)

Lacunose. - Having a few scattered, irregular, broadish, but shallow excavations; furrowed or pitted. (L. lacuna, a pit.)

Lactus. - Very bright in colour. (Evidently from L. laetus, bright.)

Lageniform. - Bottle-shaped in form; bellying out and then ending in a narrow neck. (L. lagena, a bottle, and form.)

Lagenoid. - Flask-shaped. (L. lagena.)

Lamellatæ. - (Antennæ.) Having only the apical portion flabellate. (L. lamella, a thin plate or scale.) See Lamina.

Lamellate, Laminate. - Plated, sheet or leaf-like; composed or covered with laminæ. (L. lamella, plate.)

Lamelliform. - Having the form of a plate, leaf or scale. (L. lamella, and form.)

Lamina, Laminæ, Lamella. - a thin flat plate or scale. (L. a plate, or scale.)

Lamina supra-analis. - The term Haase applies to the suranal plate. (L.)

Laminæ. - The two corneous plates which are laterally affixed to the mouth of Pulex. (L. lamina.)

Lanate. - Covered with fine, very long, flexible and rather curling hairs, resembling wool; wool-like. (L. lana, wool.)

Lanceolate. - Straight, flat, and decreasing to a point; lance-like; gradually tapering to the outer extremity. (L. lancea, a lance.)

Laniarii. - Canine-teeth; very sharp, usually long conical teeth. (L. lanio, to tear.)

Lanuginosus, Lanuginose. - Covered with a thick down, or fine soft hair. (L. lana.)

Lanuginous. - Having long curled hairs. (L. lana.)

Large Intestine. - The tube immediately between the small intestine (ileum) and the colon (or rectum). (L. largus, great, and intestine.)

Larva, Larvæ. - An insect after issuing from the egg; the second stage of an insect's life; the caterpillar stage (the term “caterpillar” is generally applied to the larvæ of butterflies and moths). (L. a mask.)

Larvæ aculeatæ. - Larvæ possessing dense hair, which is fur-like in appearance. (L. larva, larvæ, and aculeatus.)

Larvæ cornutæ. - Larvæ possessing fleshy horns or processes. (L. larvæ, and cornu, a horn.)

Larvæ furciferæ. - Larvæ possessing a furcate process, the branches of which are pierced, so that the larvæ have the faculty of protruding slender threads through these tubes for the purpose - as is supposed - of scaring inimical ichneumons. (L. larvæ, and furca, a fork, and fero, to bear.)

Larvæ ursinæ. - Hirsute caterpillars, which are completely clothed with long hairs and bristles, and which, from their stiffness and sharp points will often cause an unpleasant inflammation upon the skin. (L. larvæ, and ursus, a bear.)

Larval. - Pertaining to the larva. - (L. larva.)

Larvated. - Masked. (L. larva.)

Larviparous. - Bringing forth larvæ. - (L. larva, and parous, from pario, to bring forth.)

Laterad. - An abbreviated form of laterally, or lateral.

Lateral. - Pertaining to the side. (L. latus, lateris, a side.)

Lateral Sympathetic System. - A pair of small ganglia situated one on each side of the œsophagus. The nerves are small and confined to the dorsal and lateral portions of the anterior region of the œsophagus.

Latericius. - Resembling bricks in colour. (L. consisting of brick.)

Lateritius. - Brick-red in colour. (L. laterculus, a brick.)

Latticed. - Cancellated. (Fr. lattis, lath-work.)

Leg. - One of the six chief organs of locomotion, arising from the segments of the thorax, and which are made up of four main portions, the coxa, femur, tibia, and tarsus. The tibia (Say). (Icel. leggr, a leg, a hollow bone.)

Lenticular. - Lens-shaped. The horizontal section is circular, and the vertical lanceolate; resembling a lentil in shape; having the form of a double-convex lense. (L. lens, a lentil.)

Lenticulate. - Having the opposite sides convex; meeting in a sharp point. (L. lens.)

Lenticulate. - (Egg.) Depressed, circular, and frequently ribbed. (L. lens.)

Lepidoptera. - A group of Hexapoda; an order of insects, including butterflies and moths, which possess four wings, covered with minute, powder-like scales. (Gr. lepis, a scale, and pteron, a wing.)

Leucocytes. - The blood corpuscles; they vary considerably in shape, from oval to round, but they are usually elongate, with a rounded nucleus. (Packard.) The originator of the name was Robin, who applied it to the lymph corpuscles of vertebrates. (Gr. leukos, white, and kutos, a hollow, a vessel.)

Levigate. - Smooth surfaced, free from elevations or depressions of any kind. (L. lævis, smooth, ago, to make.)

Levigate, Levigatus, Levis. - Possessing a smooth surface. (L. lævis, and ago.)

Liberum. - (Head.) (L. liber, free.) See Free.

Ligneous, Ligniform. - Wood-like, inelastic in substance. (L. lignum, wood.)

Lignivorous. - Feeding on wood. (L. lignum, wood, and voro, to devour.)

Ligula. - The Lingula. (Saunders.) (L. lingua.)

Lilaceus. - The colour of lilac, or lilies. (L. lilium, a lily.)

Lilacinous. - Lilac colour; like violaceous, only duller and tinged with red. (L. lilium.)

Limb. - (Superficies.) The circumference; the edge or border. (L. limbus, a border.)

Limbate. - When one colour is surrounded by a margin of a different colour; bordered. (L. limbus.)

Limbus. - The border surrounding the disc. (L. a border.)

Line. - A very slight, generally straight, but also sometimes bent, different coloured stripe. (L. linea, a string of flax, from linum, flax.)

Linear. - Having the lateral margins very close together, and parallel throughout. (L. linea.)

Lineate, Lineated, Lineatus. - With longitudinal stripes; marked longitudinally with depressed parallel lines. (L. linea.)

Lineate, Lineatus. - Raised lines on the surface Provided with line-like marks. - (L. linea.)

Lingua, Lingula. - The endopodites together; the tongue; the second piece constituting the labium, it reposes internally upon the mentum. It is generally a more or less fleshy organ, which frequently protrudes beyond the anterior margin of the mentum, in which case the exterior inferior side is horny (see Os hyoideum). A capillary instrument between the lancets of an haustellum. Lingula, the apical portion of the labium. (L. lingua, the tongue.)

Lingua Spiralis. - The tongue of those insects constituting the Lepidoptera. (L. lingua, and spiro ?) See Spiral Tongue.

Linguiform. - Having the form or shape of a tongue. (L. lingua, and form.)

Literate. - Ornamented with characters resembling letters. (L. litera, a letter.)

Litura, Lituræ. - An indistinct spot, paler at its margins, generally of colour. Having the appearance of being blotted. (L. litura, a blot; indistinct.)

Liturate. - Possessing lituræ. (L.)

Lividus. - Black and blue; of a lead colour; discoloured; the colour of liver. (L.)

Lobate. - Having the margin divided by deep undulating and successive incisions. (Gr. lobos, lobe of the ear.)

Lobate. - Divided to the middle into parts with convex margins, which recede from each other. (Gr. lobos.)

Lobes. - The parts of an organ separated one from another by a more or less deep division. (F. - Low L. - Gr. Fr. lobe. - Late L. lobus. - lobos, a lobe of the ear or liver.)

Lobes, Lobi. - The lobes, the parts of the maxilla above the palpus. They include the lobus superior, lobus inferior, and the ungues. (Gr. lobos.)

Lobes, Lobuli. - Rounded portions of the base of the wing. (Gr. lobos.)

Lobiform. - In the form of a lobe. (Gr. lobos and L. forma.) [PM]

Lobus maxillæ. * -
* Intermaxillaire according to Straus.
The maxillary lobe, the fourth piece constituting the maxilla, it is generally completely horny, and hooked, its interior margin concave, or stalked; but it is varying in structure according to the genealogical position of the insect. (Gr. lobos, and L. maxilla.)

Lobus Inferior. - The lower-lobe. The lower lobe of the maxilla, covered by the lobus superior. (Gr. lobos, and L. comparative of inferus, low.)

Lobus Superior. - The upper lobe.†
† It is called the Galea by Fabricius.
The outer lobe of the maxilla, incumbent on the inner one. (Gr. lobos, and L. comparative of superus, high, from super.)

Longiores. - (Antennæ.) The term is used when the antennæ are longer than the body. (L. longus, long.)

Longissimæ. - (Antennæ.) The term is used when the antennæ are very much longer than the body. (L. longus.)

Longipennate. - With long wings. (L. longus, and penna, a feather.)

Longitudinal. - Running lengthwise; the direction of the longest diameter. (L. longitudo, from longus.)

Longitudinal Sternæ. - Muscles stretched lengthwise along the lower wall of the abdomen, from the front edge of the second sternite to the front edge of the seventh. (L. longus, and sternum, breast-bone.)

Longitudinal Tergæ. - Muscles beneath the upper wall of the abdomen, each set connecting with the front edge of a segment with the front edge of that next behind. (L. longus, and tergum, the back.)

Loopers. - The larvæ of Geometridæ, called loopers because they form a loop-like position by alternately elevating and straightening the body while walking. (Gael, lub, a bow.)

Lora. - A corneous angular machine observable in the mouth of some insects, upon the intermediate angle of which the mentum sits, and on the lateral ones the cardines of the maxillæ; and by means of which the trophi are pushed forward or retracted. (From L. lorum, a thong.)

Lozenged. - Being similar in shape to a lozenge; having two opposite angles acute and two obtuse, forming a quadrangular figure; in the form of a rhombus. (F. Formerly losenge, especially a shield of a diamond shape [in heraldry] - O.F. losenge, lozenge [F. losange], a lozenge. Origin disputed; probably from O.F. lauze, a flat stone.)

Lubricous. - Slippery as if lubricated; smooth, of a shiny smoothness. (L. lubricus, slippery.)

Lucidate, Lucidus. - Shining; mirror-like in appearance; bright; clear; radiant. (L. lux, lucis, light.)

Lumen. - The enclosed space. Lumen of the tubes, the space enclosed by the tracheal tubes. (L. space for admission of light.)

Lunare, Lunate. - In the form of a half-moon; crescent-shaped. (L. luna, the moon.)

Lunulate. - Crescent-shaped, like the new moon in shape. (L. lunula.)

Lunule, Lunulet. - A crescent-shaped spot or mark of a different colour from the rest. (L. lunula, a little moon, or crescent.)

Luridus. - Yellowy-brown; pale in colour, even resembling a ghastly hue. (L. pale; yellowish.)

Luteous. - Light in colour; of a brownish-yellow or clay colour; yellow, like the yolk of an egg. (L. luteus, yellowish; gold-coloured; saffron.)

Lutose. - Apparently or absolutely covered with dirt. (Many beetles that live in clay soil are always thus covered, for example the species of the genera Arida, Meleus variolosus.) (L. luto, lutare, to besmear.)

Lutosus. - The colour of yellow-clay. (L. luteus.)

Lyrate. - Lyre-shaped; cut into several transverse segments, and gradually enlarging towards the extremity. (L. lyra, a lyre.)