350 Mr. F. W. Edwards on 



tlie lower valves fleshy aud hairy ; ducts of spermathecse 

 enormously long, if uncoiled they would be much longer than 

 the whole body. Legs long and slender, the tarsi hair-like. 

 Venation : Us moderately short ; Rg vertical, but scarcely 

 perceptible, being only represented by a slight thickening 

 of the membrane ; base of R4+5 vertical, in a straight line 

 with the R-M cross-vein ; cell 1st Mj present, twice as long 

 as broad ; cell Mj sessile ; Cu^ fused with M for a con- 

 siderable distance, but leaving it again before the fork ; 

 cell Cuj broadest at the base ; Cug straight ; Ax rather 

 long. 



Genotype. — The species described below. 



Mitopeza differs from Dolichopeza in possessing the cell 

 1st M2 and in the position of the fork of Mj, which is just 

 before the ll-M cross-vein instead of far beyond it, and from 

 all other genera of the Dolichopezini in the fusion of Cu^ 

 with M taking place well before the fork. The female 

 genitalia are very remarkable. 



Mitopeza nitidirostris, sp. n. (Fig. 1, p. 356.) 



$ . Head dull, dark brownish ; front smooth, a quarter of 

 the width of the head in its narrowest part. Proboscis 

 shining, brownish, shorter than the head. Labella and 

 palpi blackish. Antennae scarcely as long as the head and 

 thorax together ; scape and first flagellar joints light brown, 

 remainder dark brown. First joint about twice as long as 

 broad ; second nearly round, narrower towards the base ; 

 third joint slender, half as long again as the first two 

 together ; fourth rather more than half as long as the 

 third, remainder gradually and slightly decreasing in length. 

 Second joint with a small forwardly-projecting tuft of 

 black hairs on the inner side ; flagellar joints with in- 

 conspicuous hairs on the upper surface. Thorax dark 

 brown, with indications of three darker stripes above ex- 

 tending from the front margin to the suture. Mesonotum 

 scarcely, pleurae considerably shining. Abdomen dark 

 brownish, with shimmering whitish lateral spots (the speci- 

 men is too contorted to describe accurately). Legs blackish, 

 femora lighter on the basal fourth (middle legs missing). 

 Wings somewhat infuscated, strongly iridescent; stigma 

 dark brown, with a whitish spot on each side, that towards 

 the apex being the more conspicuous ; a minute whitish 

 spot over the veins at the base of cell 1st M2 ; cross-veins 

 and branches of Cu narrowly bordered with fuscous, 

 especially on Cu^a. Halteres with pale stem and dark 

 knob. 



