268 MB. B. m'laculan on a systematic 



-J- Genus Gtltptobasis, n, g. 

 (Ogcogaster, part., TVestwd., Hag.) 



Wings elongate, much dilated in the middle, narrow at the hase ; 

 network rather close ; branch of the lower cubitus confluent 

 with the postcosta in aU the wings : anterior pair appendicu- 

 late. 



Antennas rather sliorter than the wings ; in the S slightly bent 

 at the base, and in that portion each joint is furnished with a 

 small sharp tooth or spine ; club in the form of a short truncate 

 cone. 



JEyes with the upper division rather larger than the lower. 



Thorax slightly villose. 



Abdomen rather shorter than the wings, marked with bright 

 colours ; that of the 6 slender, with a pair of claw-shaped cor- 

 neous appendices ; more robust in the $ . 



i(9^5 with the spurs of the posterior tibiae nearly equalling tlie first 

 two tarsal joints. 



Hah. India. 



Species. 



I am unable to diagnose the forms in an intelligible manner. 

 It is evident that several species exist, presenting special charac- 

 ters in the appendices of the d , independently of general pecu- 

 liarities. As in several other genera, the males seem to be much 

 rarer than the females, or tlieir habits cause them to be less fre- 

 quently captured; hence much difliculty arises. The following 

 separation of described species will probably be found tolerably 

 correct. The wings, as in Acheron and Hyhris, certainly acquire 

 an amount of tinting varying according to the maturity of the 

 individual. 



1. G. DENTiFEiiA, Westwood. (Ascal. (Ogcog.) dentifer, West. Cab. 

 Or. Ent.) 



I possess several examples from Bombay that are certainly re- 

 ferable to this species. 



2. G. INCUSANS, Walker. (Ascal. incusans. Walk. Cat. Brit. Mus. 

 Neurop. p. 442, <? .—A. nugax. Walk. op. cit. p. 433, $?) 



Hub. Ceylon. 



G. incusans is certainly distinct from denfifera. That nugax 

 may be the female of it is probable from the similarity of locality. 



