ORIENTAL SPECIES OF CHRYSOPS 291 



7. Wings with a clear spot in the discal cell, first joint of the 



antenna slightly incrassate. Abdomen blackish with pale 



spots stimulans. 



(Bengal.) 

 Wings with .no clear spot in the discal cell ..-.., 8 



8. Band of wing broad throughout. Abdomen yellow with a 



black bifid stripe in the second segment .... Indiana. 



(South India ; Assam.) 



Abdomen yellowish, with a black band in the middle ..... 9 



Abdomen yellowish, with two distinct black bands . . . . . 10 



9. Abdomen with blackish legs and face ..... fasciata. 



(Malay ; Java ; Sumatra.) 

 Abdomen with yellowish brown legs and face . . . fixissima. 



(Ceylon ; Sarawak.) 



10. Abdomen with the black bands narrower .... signifer. 



(Philippines.) 

 Abdomen darker, the black bands broader .... cincta. 



(Malacca ; Philippines.) 



11. Abdomen black with a yellowish band on the second segment. 



Small species , flavocincta. 



(Assam ; Ceylon ; Sarawak.) 



Chrysops dispar, Fabr., (Plate XLI, tig. 2) is a common South Indian 

 species, easily distinguished from the others by the colouration of the 

 abdomen, which is yellow, with a dark bifid stripe commencing on the 

 second segment and extending to the fourth. Chrysops dimidiata, van 

 der Wulp, a West African species, is said to enter houses and to bite 

 man. 



It has been announced recently that Leiper has demonstrated that 

 the development of Filaria loa is completed in the salivary glands 

 of a species of Chrysops in Calabar, Southern Nigeria. 



GENUS HAEMATOPOTA, MEIGEN 



Medium sized or small flies with elongated bodies and with light and 

 dark markings on the wings. Head transversely oval, and distinctly 

 broader than the thorax ; the eyes may be hairy or nude ; in the female 

 they are widely separated. The antennae are three-jointed ; the first 

 joint is thick and moderately long, the second very short, the third longer 

 than the first two together, and consisting of three segments incompletely 

 separated from one another. The thorax is rounded and may be marked 

 with bands or spots. The abdomen is elongated with parallel sides. 

 The wings are long and of a dark brown or black colour, and may have 

 three or more rosettes formed by pale marks on a darker ground colour. 



In most of the females of this genus the eyes are highly coloured, and, 

 as the markings have been employed to a considerable extent in 



