110 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



Eyes of male normally thickly pubescent, those of female less thickly 

 so, but hairs always easily visible in both sexes; eyes practically con- 

 tiguous in male, usually obliterating the frontalia at point of con- 

 tact; female front at vertex fully one-third head-width or consider- 

 ably more 5 



5. Abdomen pollinose in whole or part 6 



Abdomen without pollen, wholly glabrous; both sexes normally with 



median marginal pair of macrochasta? on second segment 8 



6. Female without and male with median marginal pair of macrochajtaB 



on second segment 7 



Both sexes with such pair; parafacial hair rows well developed in 

 both sexes. . . .Ennyomma robust a subsp. rnadera new subspecies 



(Subg. A) 



7. Apical cell normally closed; front in both sexes very prominent, antenna? 



inserted high; parafacial hairs normally vestigal in female; frontalia, 

 antenna" and palpi dark. 



Ennyomma robust a ncomexicana new name for 



MyiophasiarobustaW&lton, 1914, Proc.U. S.N.M. 



XLVIII. 179 (nee Coquillett, holotype, 1897, 



Rev. Tach. 51) (Subg. A) 



Apical cell narrowly open; front of male not prominent; parafacial hair 

 rows well developed; frontalia, antennae and palpi light reddish or 

 yellowish Ennyomma robusta (Subg. A) 



8. Front of male not prominent; head not bulged behind below eyes; 



marginal row of macrochajtffi of third abdominal segment closely 



placed 9 



Front of male prominent, the parafacials much widened; head bulged 

 behind below eyes; marginal row of third segment not closely 

 placed 10 



9. Insertion of hind crossvein nearer bend of fourth in both sexes; palpi 



and third antennal joint black or blackish 



Ennyomma clistoides (Subg. A) 



Insertion of hind crossvein in middle in male, nearer bend in female; 

 antennae wholly rufous Ennyomma ruficornis (Subg. B) 



10. Parafacials, parafrontals and mesoscutum cinereous pollinose; median 



marginal pair of macrochaHrc of second segment weak in male, vary- 

 ing in female from absent through weak to well developed; palpi 

 black or blackish. 



Ennyomma clistoides subsp. iesensis new name 



for Myiophasia setigera Walton, 1914, Proc. 



U. S. N. M. XLVIII. 179 (nee Townsend, 



1908, Tax. .Muse. Flies Smiths. Misc. Coll. 



LI. 56) 



Parafacials parafrontals and mesoscutum silvery-white pollinose; 

 median marginal pair of macrochsetse of second segment strong in 



