PLEUROCERINELLA. — STYLOGASTER. 369 



latter; a vertical, glistening silvery stripe on middle of pleurte 

 p.'issiiig iu Front of wing-base. Abdomen shining black, of the 

 form normal in Conojjs, with a little, just obvious, pale l)rown 

 pubescence ; 1st segment hardly wider than ^nd : 2iid and 3rd 

 segments sub(H]uaI, a litth? longer than 4th and 5th; 5th with a 

 long black genital sheath ; 6tli and 7th large, rounded. Genitalia 

 inconspicuous. Legs : femora not at all thickened, tibiae without 

 tlie *' twisted " appearance so common in the Coxopiis'^e. Legs 

 mainly dark brown or black; coxae with whitish reflections; 



Fig. 77- — Pleurocerinella dioctriaformis, sjj. nov., antenna. 



femora pale brownish-yellow at base and tips ; basal half of fore 

 and hind tibia), and almost the whole of the middle pair, pale 

 brownish-yellow ; metatarsi mainly brownish-orange, w^ith whitish 

 pubescence below. Win'js pale grey ; anterior cross-vein opposite 

 tip of auxiliary vein and at middle of discal cell ; posterior cross- 

 vein erect, opposite tip of second vein ; halteres pale yellow, 



Len(/th, 8-9 mm. 



Described from a J and $ in the British Museum from Simla, 

 viii. & ix. 1898 (Nurse); also a $ from Maskeliya, Ceylon 

 ( Green). 



Geinis STYLOGASTER, Macq. 



). 

 (1850) 

 g. Zool. p. 308 (1859). 



Gexottpe, Conojys stylata, Fabr. ; by original designation. 



Head large, transverse, barely projecting beyond eves either in 

 front or below, much broader than long and much broader than 

 thorax. Eyes widely separated in 6 and $ ; front facets very 

 greatly enlarged in both sexes ; ocelli present. Antenme elongate 

 porrect ; ord joint as long as 1st and 2nd together, sword-shaped, 

 with tip rounded ; arista subapieal. One pair of strong vertical 

 bristles. Proboscis very long and thin, rigid, geniculated at about 

 the middle. Thorax ajjproxiraately quadrate, a little drawn out 

 hindwards; humt;ri distinct; scutellum of moderate size, sub- 

 triangular with rounded corners. There are 1 or 2 weak humeral 

 bristles, 2 ])resutural, 1 or 2 supra-alar, 1 dorsocentral (pre- 

 scutellar), 1 or 2 on each of the posterior calli, 1 niesopleural, and 

 1 pair of scutellar, apical in position. All the bristles are strong. 

 Abdomen elongate, distinctly longer than thorax, cylindrical, a 



2b 



