112 



projecting lamellae. Legs practically bare, bright chrome-yellow, 

 middle coxae obscured ; a short blackish-brown streak at tip of 

 hind side of middle femora ; hind legs with tip of coxae, extreme 

 base of femora, and a broad apical band on femora and tibiae black. 

 Winys yellow, veins brownish black ; halteres bright yellow. 



Length, 20 mm. 



Described from a single in the British Museum from the 

 Khasi Hills, Assam. 



Subfamily LEPTIN^E. 



Face with a rounded socketed epistoma ; eyes bare, generally 

 contiguous in the $ , facets of uniform size ; proboscis often 

 swollen, conspicuous, though never very long; palpi distinct, 

 moderately long, porrect, or pendant. Antennae with 3rd joint 

 simple, rounded, oval, or reniform, always with a long apical, 

 subapical, or subclorsal arista. Abdomen elongate-conical; genitalia 

 of moderate size. Legs slender ; tibiae with rows of minute 

 bristles, middle pair with two spurs at tip, hind tibiae with one or 

 two spurs.* Alulae well developed ; alar squamae of moderate 

 size, thoracic pair absent. 



The genera have already been tabulated on p. 103. 



Genus ATRICHOPS, Verr. 

 Atrichops, Verrall, Brit. Flies, v, p. 291 (1909). 



GENOTYPE, Aiherix crassipes, Mg. (Europe) ; by original de- 

 signation. 



Head semicircular, a little narrower than thorax, more rounded 

 and less tilted forwards than in Atherix face with a quite bare, 

 rounded, socketed epistoma ; cheeks large, bare in both sexes ; 

 t'rous in c? nearly or quite bare, slightly narrowing from vertex to 

 antennae ; in with a little sparse pubescence ; occiput promi- 

 nent, especially on lower part in c? ; eyes bare in both sexes, 

 contiguous or practically so in <5 , facets uniform in size ; the 

 eyes in $ separated distinctly. Proboscis prominent, thick, with 

 long oval hibella ; palpi two-jointed, prominent, slightly drooping. 

 Antennae rather short, the space above their base bare; 1st joint 

 cup-shaped, 2nd more or IPSS rounded, rather short, both bristlv ; 

 3rd kidney-shaped, with a dorsal arista.f Thorax slightly arched, 

 with close short pubescence ; pleurae partly pubescent ; scutellum 



* The apparent disagreement here with Verrall, who states that two spurs 

 are found on all the posterior tibiae, is due to his ranking Chrysopila as a 

 separate subfamily, in which genus the hind tibise possess only a single spur. 



t Verrall speaks of it as "terminal, which from the shape of the 3rd joint 

 (deepened downwards) appears to be dorsal." This author regards the tip of 

 the 3rd joint as its furthest point in a straight line, in which case the arista is 

 terminal, but I am regarding its tip as the extremity of its greatest length, in 

 which case the arista is dorsal. 



