Bisinuate: a margin or line with two sinuations or incisions.

Bituberculate: with two distinct tubercles.

Biuncinnate: with two hooks.

Bivalve -ed: applied to mouth parts consisting of two parts or valves united to form a tube.

Bivittate: with two longitudinal stripes or vittae.

Blade: of maxilla, see lacinia.

Blastem: a nucleated protoplasmic layer preceding the blastoderm.

Blastoderm: the germinal membrane from which the organs of the embryo are formed.

Blastodermic cells: are those forming the blastoderm.

Blastogenic: relating to or inherent in the germ or blast.

Blastoph.o.r.e: the primitive mouth of the embryo.

Blind: without eyes: applied also to an ocellate spot without a pupil.

Bloom: a fine violet dusting similar to that on plums. {Scanner's note: See Pruinous.}

Blotch: a large irregular spot or mark: large whitish membrane between abdomen and thorax in certain saw-flies.

Blunt: not sharp; obtuse at the edge or tip.

Body: the trunk: usually applied to the thorax only; rarely to the abdomen alone; sometimes to thorax and abdomen combined.

Bombifrons: front of head with a blister-like protuberance.

Bombous: blister-like; spherically enlarged or dilated.

Bombycinous: a very pale yellow like fresh spun silk.

Boreal: from or belonging to the north: is that faunal region that extends from the polar sea southward to near the northern boundary of the United States and farther south occupies a narrow strip along the Pacific Coast and the higher parts of the Sierra-Cascade, Rocky and Alleghany Mountain ranges; divided into Arctic, Hudsonian and Canadian: see austral and tropical.

Borer: applied to an insect or larva that burrows or makes channels in woody or other vegetable tissue.

Botryoidal: cl.u.s.tered like a bunch of grapes.

Bouclier: the p.r.o.notum, q.v.

Bouton: a b.u.t.ton; the terminal lappet-like process at the tip of the ligula in bees: = spoon.

Brachelytra: with abbreviated wing covers or elytra.

Brachia: the arms: has been applied to raptorial fore-legs.

Brachial: relating to an arm; arm-like.

Brachial cells: Hymenoptera; 1st (Nort.), = costal and sub-costal (Comst.) 2d (Nort.), = medial (Comst.); 3d (Nort.), = cubital (Comst.); 4th (Nort.), = 2d a.n.a.l (Comst.).

Brachial veins: of primaries in Hymenoptera, originate at base, run parallel to inner edge toward a.n.a.l angle; often connected with the cubital cellules by means of recurrent venules.

Brachium: the fore tibia.

Brachycerous: Diptera; with short, 3-jointed antennae.

Brachypterous: with short or abbreviated wings.

Brachyostomata: brachycerous Diptera with short proboscis.

Brain: that ganglion of the nervous system which lies in the head above the oesophagus; formed of the first three primitive ganglia: see supra-oesophageal.

Branchiae: air tubes or gill-like processes of aquatic larva;.

Branchial: relating to the gills or branchiae.

Branchiate: supplied with gills or bronchia.

Bra.s.sy: yellow, with the l.u.s.tre of metallic bra.s.s.

Breast: the under surface of thorax or sternum.

Breast-bone: in Cecidomyid larvae; a h.o.r.n.y, more or less elongate process of the under side behind the mouth opening, supposed to represent the labium = anchor process.

Breathing pores: see spiracle.

Brevis: short.

Brides: h.o.m.optera; two pieces on the face, one each side of clypeus and lower part of front.

Bridge: Odonata; a secondary longitudinal vein connecting the radial sector (Comst.) with Mi + 2, apparently forming a continuous part of the radial sector; it is the proximal portion of the subnodal sector of de Selys and Hagen.

Bridge cross veins: Odonata; those cross veins, one or more in number, extending between M1 + 2 and the bridge (in de Selys between princ.i.p.al and subnodal sectors) proximal to the oblique vein.

Brin: the fluid silk thread from each salivary gland.

Bristle: a stiff hair, usually short and blunt.

Broken: interrupted in continuity; as a line or band.

Bronze: the color of old bra.s.s.

Brood: all the specimens that hatch at about one time, from eggs laid by one series of parents and which normally mature at about the same time.