Mr. C. G. Lamb on Exotic Chloropidse. 



397 



Thorax, dorsum, and scutellum subshining brown-black, 

 with very short apparently black hairs, those on the rounded 

 scutellum a little longer and much more widely scattered ; 

 long, nearly parallel, terminal bristles, with one short side- 

 bristle ; in side-light both bristles and hairs appear golden 

 brown. Along the dorsum run two narrow, shallow, non- 

 punctate sulci which are dull yellow, and these stripes just 

 run on to the basal angles of the scutellum ; callus orange ; 

 pleura and metanotum shining orange-black, the latter the 

 darker. 



Wings (fig. 29) clear, just perceptibly yellow between 1 

 and 2, veins brown. Halteres pale yellow. 



Fig-. 28. 



Fig. 29. 



Oscinis bistriata. 

 Fig. 28, X 40 ; fig. 29, X 22. 



Legs all dull orange, femora with the faintest possible 

 suffusion. 



Abdomen slightly shining, blackish, paler at the base.. 



Size 1^ mm. ; wing a little more. 



Bkitish East Africa: Njoro (T. J. Anderson). 



A nomceoceros, gen. nov. 



In the collection are two pairs of a remarkable forim 

 exhibiting marked sexual dimorphism in the antenna. The 

 eyes and most of the body are densely haired. It would 

 almost seem that they bear somewhat the same relation to 

 the New Guinea genus Thyridula (Becker, III. p. 94) as the 

 new genus Bathyparia bears to Euryparia. 



Generic diagnosis. — The large head (tig. 30) bears a big 

 punctured triangle, which carries a shining broad central 



