TRICHOPEZA. 373 



on hinder side of hind tibiae at about one-third of the length. 

 Wings very pale grey, very iridescent ; 3rd longitudinal vein 

 widely forked beyond half its length ; prongs of upper branch of 

 4th vein issuing wide apart from the discal cell, the latter being 



Fig. 35. — Triehopeza fusca, Brun. 



large, long, pointed basally, about equal in length to 2nd posterior 

 cell; 1st basal cell a little longer than 2nd, which latter is about 

 as long as anal cell ; halteres yellow. 



Length, 3 mm. ; wing, 4| mm. 



Described from a unique 5 in the Indian Museum from 

 Kurseong, 25. iii. 1910 (Gravely). 



The peculiar nature of the antennae ought easily to distinguish 

 this species from all other Indian EMPiDiE. 



Subfamily TACHYDROMIINiE. 



Head with eyes more variable than in the other subfamilies, 

 generally separated above the antennae in both sexes ; below they 

 may be contiguous or separated ; when contiguous below, the 

 frontal facets may or may not be larger than the others ; in some 

 genera the eyes microscopically pubescent. Proboscis short, 

 sometimes curved ; palpi 1-jointed. Antennae 3-jointed, with a 

 styliform arista of one or two joints. Thorax often nearly as 

 broad as long ; metapleura bare, or with very short hairs. Legs 

 of varying lengths ; sometimes the fore femora or four anterior 

 femora thickened, in which case the four anterior legs are 

 raptorial ; middle tibiae sometimes with a spine. Wings with 

 axillary lobe more or less developed ; 3rd and 4th longitudinal 

 veins simple ; three posterior cells ; no discal cell ; lower branch 

 of 5th vein present or absent; basal cells rather large, subequal 



