NO. 1935. MU8C0ID FLIES FROM SOUTH AMERICA— T0WN8END. 317 



INCAMYIA, new genus. 



General characters of Dexodes, with the strongly elongate second an- 

 tennal joint, and the frontal bristles descending low; but eyes hairy, 

 facialia strongly ciliate about one-half way up, and ventral carina 

 of female very pronounced and occupying second and third segments. 

 Vibrissas on level with the slightly prominent oral margin. Female 

 front about one and one-half times the width of one eye, the face but 

 slightly wider. Female ^vith one proclinate and two divergent orbitals 

 in line, and one reclinate orbital inside these. Pair of weak proclinate 

 divergent ocellar bristles. Third antenna! joint of female about 

 one and one-half times as long as second. Arista abruptly thickened 

 on less than basal one-third. Proboscis short, palpi slender. 



Three sternopleural bristles, three postsutural bristles. Three 

 lateral pairs of scutellar bristles, the two posterior pairs equal and 

 very strong, the anterior pair little more than one-half as long; 

 apical absent; two very weak discal pairs, the anterior pair closely 

 approximated, the posterior pair separated. All segments except 

 first with pair of median discal bristles, first and second mth median 

 marginal pair, third with marginal row of eight, anal with lateral 

 discal bristles and marginal row; lateral marginal ones on first and 

 second segments. Terminal segments with base of piercer and larvi- 

 positor deeply sunk within anal or fourth (actually fifth) segment, 

 the piercer strongly thrust into the deep carina of third (actually 

 fourth) segment, only latter having the short spines for holding skin 

 of host. Claws of female nearly as long as last tarsal joint, hind tibiae 

 irregularly bristly. Anal cell closed in margin well before wingtip. 

 Fourth vein rounded at bend, hind cross vein nearer bend. Strong 

 costal spine. 



Reproductive habit, subcutaneous larviposition; uterus slender, 

 developing white maggots. 



Type-species. — Incamyia cuzcensis, new species. 



INCAMYIA CUZCENSIS, new species. 



Length of body, 5.5 mm.; of wing, 4.5 mm_. One female, Cuzco, 

 Peru, February 21, 1910, on foliage. 



Black, with brassy pollen. Parafacials and parafrontals golden- 

 brassy, vertex and orbits same, facial plate and facialia blackish with a 

 faint silvery bloom, frontalia and antennae dark brown, palpi pale 

 brownish-yellow, cheek-grooves reddish-brown, cheeks narrowly 

 brassy above, occiput ashy. Sternopleurae brassy ; mesoscutum thickly 

 pollinose with pale brassy, leaving two heavy ^A^ide black vittae 

 which extend more or less distinctly on sides of scutellum, rest of 

 latter brassy pollinose. Abdomen with golden-brassy pollen on 

 second and third segments reaching on sides and in middle nearly to 



