bacteraemia Bacteria in the blood.
bacilluria Having bacteria in the urine.
bacteriostatic Preventing the growth of bacteria.
basal (basad). An adjective (or adverb) denoting position near or movement toward the base of a body part. The base of the head or pronotum is at the posterior end while that of the abdomen or an elytron is at the anterior end; on the legs or antennae, basal and proximal are synonymous.
basale (of tegmen). The basal portion of a sheath-like tegmen which is divided transversely. This appears to be homologous to the phallobase. Also called basal piece.
basal lamina One of two layers that form the basement membrane, a amorphous sheet which underlies epithelial cells.
basal piece See Basale and Phallobase.
basicosta see humeral plate. (Fig. 39.7, I of A)
basitarsus First and usually the largest segment of the tarsus
bead. A fine raised margin.
bedbug Cimex lectularius
benthic Pertaining to the bottom of the sea, lakes or pond.
bilobate aedeagus. Aedeagus in which the phallobase and parameres are well developed but the penis is membranous or sclerotized only at base, where there may be a pair of anterior struts. This type is characteristic of many Scarabaeoidea.
biordinal Of two alternating sizes.
bipectinate Concerned mainly with the antennae - feathery like extensions projecting out from two sides of a central axis. [see picture]
biramose antenna. The presence of a single ramus on each antennomere.
biserial In two series, often concentric.
brachelytrous With shortened elytra.
brachyapterous With tegmina and wings shorter than the abdomen but overlapping each other dorsally.
bostrichoid aedeagus. Aedeagus in which the phallobase broadly overlaps the parameres, and the latter are fused basally to each other and to the base of the penis; a secondary bridge may also unite the parameres. This type of aedeagus is found in most Bostrichoidea.
buccal Pertaining to the mouth.
bulb Rounded expansion of an organ.
bulla (Pl. bullae) A blister or blister-like structure.
buprestoid aedeagus. Aedeagus in which the phallobase is more or less reduced and often fused to the parameres, which form a tube surrounding the penis; the entire structure is usually somewhat flattened. This type occurs only in Buprestidae.
bursa coplatrix The vaginal pouch of insects; the genital chamber.
byssoid To consist of fine threads.