calli: see calli axillary.

Axillary cell: in Diptera (Will.), = 2d anal (Comst.).

Axillary excision: = a. incision, q.v.

Axillary incision: Diptera; an incision on inner margin of wing, near base, which separates the alula from the main part.

Axillary lobe: the sclerite covering the base of the wing in Diptera; see also alula and posterior lobe.

Axillary vein: one or two longitudinal veins toward the inner margin from the anal vein (Ephemeridae); a group of several (10-20) radiate veins that occupy the anal field in Orthoptera.

Axis: a small process at base of elytron, upon which it turns.

Azure -eus: clear sky-blue [cobalt blue].

Azygos: unpaired; a structure without a fellow; sometimes applied to an unpaired oviduct specifically the enlarged portion of the vagina at the junction of the oviducts and thus = uterus.

B

Baccate -us: berry-like: applied to bladder-like ovaries from the surface of which the short ovarian tubes arise.

Back: the dorsum or upper surface.

Baculiform: rod or staff-like.

Badius: liver-brown; clearer and lighter than castaneus [dragon's blood].

Baenomere: a leg-bearing (thoracic) segment.

Baenopoda: the thoracic legs.

Baenosome: the thorax.

Balancers: see halteres.

Bald: without hair or other surface vestiture: see bare.

Band: a transverse marking broader than a line.

Bar: a short, straight band of equal width.

Barb: a spine armed with teeth pointing backward.

Barbate: furnished with barbs; hair with spines or spurs directed backward.

Barbated: bearded; in antennae with tufts or fascicles of hair or short bristles on each side of each joint; = brush-like: on the abdomen, with flat tufts at the sides or tip.

Barbule: a small barb, beard or filiform appendage.

Bare: without clothing of any kind: see bald.

Basad: in the direction of or toward the base.

Basal: at or pertaining to the base or point of attachment to or nearest the main body.

Basal area: in wings: that space nearest the point where they are attached to the body: on the metanotum of Hymenoptera, the anterior of the three median cells or areas = 1st median area.

Basal cell: Diptera; st (Will.), = radial 2 (Comst.); 2d (Will.), = media (Comst.); Trichoptera; one, two or three cells enclosed by the branches that form-the post-costal or anal vein: Odonata; an elongate cell between radius and cubitus, just before the arculus.

Basalis: the principal mandibular sclerite, when sclerites are distinguishable, to which all other parts are jointed; corresponds to the stipes in the maxilla.

Basal line: in many Lepidoptera; a transverse line extending half way across the primaries very close to base.

Basal lobe: of culicid genitalia, see claspette.

Basal post-costal vein: in Agrioninae, one of the cubito-anal cross- veins.

Basal segment of clasp: see side piece.

Basal space: that area on the primaries of certain Lepidoptera, between the base and t. a. line (q.v.).

Basal streak: in Noctuid moths, extends from base, through the submedian interspace to the t. a. line.

Basal transverse carina: on the metanotum of Hymenoptera, crosses before middle and separates the anterior from the median areas.

Base: that part of any appendage that is nearest the body: on the thorax that portion nearest the abdomen; on the abdomen that portion nearest the thorax.

Basement membrane: that thin layer of tissue upon which the epithelium rests.

Basilar: of or pertaining to the base.

Basilar cross-vein: Odonata; crosses the basilar space.

Basilar membrane: a thin membrane separating the cones and rods from the optic tract.

Basilar space: Odonata; that area at base of wings, between media and cubitus.

Basi-proboscis: basal third of the flexed proboscis of muscid flies.

Batesian mimicry: see mimicry.

Bathmis: see pterostigma.

Bave: the fluid silk as it is spun by caterpillars.

Beak: any notable prolongation of the front of the head: the snout in Rhynchophora: specifically, the jointed structure covering the lancets in the hemipterous mouth.