NEW MUSCOID FLIES FROM THE ANDEAN MONTANYA 45 



sexes. Third antennal joint about or hardly twice as long as second. 

 Proboscis about one and one-third times head-height, no palpal bristlets. 



Three stemopleural, three postsutural, three preacrostichcJ, and three 

 postacrostichal bristles, Scutellum with two long lateral pairs of bristles, 

 and a shorter slender strongly decussate apical pair ; disk well set with 

 long bristly pile or strong bristly hairs like setae. Abdomen thickly set 

 with rather long strong bristly pile, especially on base and sides, less 

 thickly showing on dorsum of anal segment, thickly developed on venter, 

 sometimes developed into quite long true bristles on base and sides of ter- 

 gum ; second and third segments with sparse marginal row of macrochae- 

 tae and a separated median discal pair, or third with discal row extending 

 across segment ; anal segment sparsely set with bristles except on front 

 border. Fossa-like scar of third antenncd joint twice as far removed from 

 base of joint as aristal insertion. Claws of female short, those of male 

 longer. Third vein bristled one-half way or more to small crossvein. 

 Wrinkle or short stump at origin of apiccJ crossvein. 



Reproductive habit, larviposition of colored maggots. 



Type, Gabanimyia polita, new species, 



Gabanimyla polita, new species. 



Length of body, 7 to 9 mm., according to degree of abdominal flex- 

 ure ; of wing, 8 to 9 mm. Two females and one male, Ccisahuiri, San 

 Gaban Canyon, about 4,500 feet, February 4, 1910, on flowers of 

 Mikania sp. ; and one male, east base of Huascaray ridge, about 7,000 

 feet, September 22, 191 1, on foliage. 



Wholly soft deep black ; head silvery-white ; occipital pile white or 

 whitish, hairs of cheeks and parafacials black ; frontalia and lunula light 

 brown ; parafrontcJs, pleurae, and front edge of thoracic scutum shining 

 black with a thin silvery coat, giving way to a faint coat of tawny pollen 

 on disk of thorax, scutellum, and abdomen which is only visible in oblique 

 lights but most noticeable on anjj segment. Four quite well marked 

 thoracic vittae, subequal. Wings smoky at extreme base ; both scales of 

 tegulae deeply black-infuscate. Antennae are brown to black with sil- 

 very bloom, first two joints more shinmg like parafrontzds. Legs wholly 

 black, the tibiae sometimes brownish. The second aristal joint is about 

 two or at most three times as long as wide, there is only a wrinkle at 

 origin of apical crossvein, the third abdominal segment is without a com- 

 plete discal row of bristles, the abdomen is narrowed and shortened. 



Type, female. 



