NEW MUSCOID FLIES FROM THE ANDEAN MONTANYA 43 



of parafrontals in female present but weaker, with addition of two procli- 

 nate orbitals. Strong pair of divergent ocellar bristles. Third antennal 

 joint of female normal, but little longer than second ; that of male fully 

 one and one-half times length of second and considerably to greatly 

 widened, subtruncate apically. PcJpi long, stout-filiform, with bristlets. 

 Proboscis beyond geniculation a little less than head-height, horny. Oral 

 profile long ; head elongate, more so, as a rule, in male than in female, 

 its lower border in male usually fully as great as its occipital height. 

 Bristles of peristomalia and lower section of facialia vibrissiform, but only 

 half as long as vibrissae. Cheeks nearly one-half eye-height in male, 

 rather more than same in female. Male with median marginal pair of 

 macrochaetae on second abdominal segment (one female has a single 

 dorsal marginal on second segment). Three strong lateral peiirs of scu- 

 tellar bristles, weak decussate apical pair (absent in one female, which is 

 type), two or three weak discal pairs, scutellar bristlets usually stronger 

 in male than in female. Costal spine long, as a rule. 



Reproductive habit, larviposition of colored maggots but probably not 

 on foliage. 



Type, Trichophoropsis puna, new species. 



This genus is seen to be much allied to Vihrissom^ia, though abun- 

 dantly distinct on very many characters as can be seen by compziring the 

 descriptions. 



Trichophoropsis puna, new species. 



Length of body, 9 to I 1 mm. ; of wing, 7 to 8 mm. Four females and 

 one male, Oroya, Peru, 1 2,250 feet, March 6, 1 9 1 3, on short herbage. 



Black ; head silvery, parafacials and parafrontcils more or less deeply 

 brassy ; facial plate amber-yellowish, brassy ; occipital pile pale to deep 

 brassy ; frontalia, third antennal joint and arista dark brown ; lunula and 

 first two antennal joints yel!owish-red, palpi yellowish-red to reddish- 

 yellow. Thorax thinly silvery, dorsum with four broad nearly equal 

 black vittae. Scutellum narrowly reddish-yellow on apex in female, very 

 vsadely so in male. Abdomen of both sexes very distinctly silvery ; male 

 abdomen with red on sides of second segment, and conspicuous reddish- 

 yellow to yellowish-red hypopygium. Legs wholly black. Wings clew, 

 hardly or only slightly tinged with tawny at base. Tegulae pure white. 

 Third antennal joint of male only moderately widened. Cheek width 

 same in both sexes. 



