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.