USED IN ENTOMOLOGY. 



19 



Brachium: the fore tibia. 



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



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-cesophageal. 

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

 Branchial: relating to the gills or branchia;. 

 Branchiate: supplied with gills or branchia?. 

 Brassy: yellow, with the lustre of metallic brass. 

 Breast: the under surface of thorax or sternum. 

 Breast-bone: in Cecidomyid larva? ; a horny, 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: Homoptcra : 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, ex- 

 tending between Mi + 2 and the bridge (in de Selys between principal 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 brass. 

 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. 

 Brunneus: a pure reddish dark brown [indian red]. 

 Brush-like: antennae with the joints laterally produced and tufted with short 



hair or bristles : see barbated. 

 Buccal: relating to the mouth cavity; rarely to the cheeks. 

 Buccal appendages: the mouth parts excluding the labrum : see tropin. 

 Buccal cavity: the mouth: = oral cavity. 

 Buccal fissure: the mouth slit or opening: the opening on each side of the 



mentum. 

 Buccate: blown up, distended; especially the cheeks. 

 Bucculas: little cheeks -or distended areas. 



Budding: applied to that form of agamic reproduction found in plant lice. 

 Bulla: a blister or blister-like structure: the shield-like sclerite that closes 



the opening to the trachea in lamellicom larvae: in Ephemerida a part of 



the costal area of the fore wing toward the tip. which is slightly swollen 



forward and furnished with more cross veins than elsewhere ; practically 



the stigma, q. v. 



