NEW MUSCOID FLIES FROM THE ANDEAN MONTANYA 85 



four indistinct rather wide vittae on latter ; frontalia brown, antennae and 

 palpi wholly black. Legs wholly black, only the tibiae with a tinge of 

 reddish-brown. Wings clear, with an infuscation in basal-cell area. Both 

 scales of tegulae soft deep black. 



This species strongly approaches the habitus and coloration of Gaba- 

 nimyia hystricosa, G. polita, and Fahriciopsis h^strix, except that the 

 wings are quite hyaline. 



Hystriciopsis, new genus. 



Runs to H})strida in Brauer and Von Bergenstamm's tables. May 

 be distinguished by the epistoma being only moderately salient, not nasute ; 

 by the thickly-hairy tegulae, and by the distinctly curvate character of 

 the spinelike macrochaetae. Female front at vertex about equal to eye- 

 width, that of male about two-lifths of eye-width. Proboscis short, fully 

 extended about as long as head-height, rather fleshy ; palpi rather stout, 

 slightly thickened apically. Epistoma well produced, but very weakly so 

 compared with Hystriciidae. Vibrissae inserted far above oral margin. 

 Third antenncil joint in both sexes only a little longer than the elongate 

 second ; basal aristal joints not elongate. Two to three proclinate orbital 

 bristles in female, none in male. Ocellar bristles present, proclinate, about 

 as strong cis frontals ; inner vertical bristles cruciate. Eyes hairy, extend- 

 ing not quite as low as vibrissal insertion. Cheeks more than one-half 

 eye-height in both sexes. Parafacials naked. 



AbnormeJly two, normally three sternopleureJ bristles; four postsutural 

 bristles. Scutellum and abdomen densely clad with thomlike but curved 

 macrochaetae, especially those of abdomen curved ; first abdominal seg- 

 ment with none above except at sides, all segments with spine-bunches 

 on medicin line of venter. Apiceil cell widely open well before wingtip, 

 fourth vein bent at right angle, last section of same strongly bowed in, 

 hind cross vein nearer bend, costal spine atrophied. Hind scale of tegu- 

 lae thickly-hairy on whole upper surface except where covered by front 

 scale. Claws of male much longer than those of femaJe. Abdomen of 

 female not emarginate behind. 



Reproductive habit, larviposition probably of colored maggots not on 

 foliage. 



Type, H^striciopsis obscura, new species. 



The hairy tegulae will distinguish this form at once from zJl nearly 

 silied forms. 



