60 E. T. Atkinson — Notes on Indian Rliyncliota. [No. 1, 



Head broad or very broad, sometimes somewhat narrower tlian the 

 thorax ; sides of clypeus very often without a ridge ; thorax posteriorly 

 roundly sinuated, without ridges or furnished only with an obsolete 

 median ridge : scutellum very large, long : tegmina flat, ample or very 

 ample, costa dilated ; costal membrane transversely veined or reticulated : 

 last tibiae spinose ; first joint of last tarsi short or shortish. Differs from 

 Trojpiduchma in having the thorax without discoidal ridges or only with 

 a single rather obsolete one and the first joint of the last tarsi being 

 short or shortish (8tdl). 



Genus Ricania, Germar, Stal. 



Mag. Ent. iii, p. 221 (1818) ; Stal, Hem. Afric. iv, p. 221 (1866) : Fieber, Rev. 

 Mag. Zool. (3 ser.) ii, p. 342 (1875). 



Germar formed this genus from Flat a, Fabr., taking the Indian 

 species B. hijalina, Fabr., as his type with the following description : — 

 ' Head short, transverse : frons lower, subovate, margined on the sides : 

 clypeus annexed to the apex of the frons, conical, subulate at the apex : 

 labrum concealed ; rostrum shorter than half the body : eyes globose, 

 pedunculate above : ocelli inserted on the lower margins of the eyes : 

 antennae distant from the eyes, short, first joint minute, cylindrical, 

 second short, thicker at the apex, obliquely truncated, setigerous.' This 

 was subsequently reduced by the creation of several genera which Stal 

 reviews, absorbing some, and making other sections or subgenera. 



Stal includes in Bicania his own genus Scolypopa (Berk Ent. Zeitschr. 

 iii, p. 325, 1859 ) and gives the following diagnosis of the genus : — 



Body very broad, not prominent before the eyes anteriorly trun- 

 cate or obtusely rounded : vertex very broad, short ; frons transverse or 

 equally long and broad, very often keeled ; sides of clypeus without a 

 ridge : thorax slightly arched, very often furnished with a fine ridge in 

 the middle : scutellum furnished with three ridges running through it 

 and anteriorly on both sides with an abbreviated ridge : tegmina varying 

 in form and size, very often triangular and very ample ; basal tegula 

 large or somewhat largish ; two veins emitted from the base of the 

 clavus united in the middle or behind the middle of the clavus : wings 

 moderate or small, anal area furnished with a simple vein : feet moder- 

 ate, simple ; last tibise very often bispinose, very rarely trispinose. 



The principal divisions or subgenera are : — 



1. Pochazia, Am. and Serv. Hist. Nat. Ins. Hem. p. 528 (1843) ; 

 which includes B. fasciata, Fabr., and various African and Indian species. 



2. Tarundia, Stal, Berlin Ent. Zeitschr. iii, p. 325 (1859) and 

 Rio Jan. Hem. ii, p. 70 (1862) ; which includes several species from 

 Africa and the Indian Archipelago. 



