Manchester Memoirs, Vol. xliii. (1899), No. 3. 69 



hyaline ; the apex faintly smoky ; the nervures and stigma 

 yellow ; before the stigma, and extending to the bottom 

 of the discoidal and of the cubital cellule, is a pale brownish 

 cloud. The base of the petiole yellowish ; deeply 

 triangularly depressed ; the sides finely and closely 

 longitudinally striated ; the sides to the apex are deeply 

 and widely depressed and have three central transverse 

 keels and one apical; the middle sharply and distinctly 

 keeled. The basal three-fourths of the sides of the second 

 segment deeply and widely, the apex more narrowly, 

 depressed ; its centre carinate ; the base of the second 

 segment widely depressed ; in the middle are seven stout 

 keels ; the narrowed sides have a few indistinct keels ; the 

 oblique depression is wide, smooth, and deep ; the fourth 

 and fifth segments are indistinctly keeled in the middle ; 

 the penultimate segment has a curved, black line at the 

 base ; the last is entirely black ; the ventral surface, except 

 at the base, yellowish ; the base black ; in the middle of 

 the penultimate segment is a small, smooth space, rounded 

 at the base, transverse at the apex. 



C Abdominal segments 2 or j distinctly longitudinally 

 striolated. 



1. Thorax flat, the lobes of the mesonotum not raised, 

 scutellum foveate; wings fuscous, yellow at the base. 



B. himalayensis. 



2. Thorax not flat ; the lobes of the mesonotum distinctly 

 raised ; scutellum not foveate. 



a. Wings fuscous, the base yellow; abdomen luteous. 



B. indiscretus. 



b. Wings fuscous ; the abdomen black ; thorax rufous. 



B. khasianus and umbratilus. 



c. Wings yellow, marked with fuscous at the stigma 

 and apex. 



B. seditiosus, dodonaeus, jejuniis, declaratus. 



E 



