Biogenesis: the production of life from antecedent life. Biomorphotica: those neuropterous insects in which the pupa is active. Bionomics: the habits, breeding and adaptations of living forms. Biophore: an ultimate constituent of germ plasm or hereditary substance. Bioplasm: formative living matter. Biparted: profoundly divided into two parts: see bifid. Bipectinate: antennae having comb-like teeth or processes on Beach side of each joint. Bipupillate: an ocellate spot with two pupils, of the same or different in color. Biradiate: consisting of, or with two rays or spokes. Biramose -ous: having two branches or doubled appendages. Biseriately: arranged in double rows or series. Biserrate: doubly saw-toothed; with a saw tooth on each side of each antennal joint. Bisetose -ous: with two bristle-like or setaceous appendages. 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. Blastophore: 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: clustered like a bunch of grapes. Bouclier: the pronotum, q.v. Bouton: a button; 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.