TAXONOMY OF 1 MUSCOIDKAX FLIES — TOWNSEND 59 



ments, and male claws very long. Clinoneura has parafacials bare, 

 only one pair of discal macrochaetae on middle abdominal segments. 

 The species described by Robineau-Desvoidy as Bstlieria tibialis is 

 neither a Ptilodexia nor a Clinoneura, since it has the apical cell 

 petiolate. 



Ptilodexia has cheeks (male) about, or slightly over, one-half eye 

 height ; antennae inserted low, so as to give a long frontal profile ; 

 vibrissas inserted high above oral margin ; no strong or other recli- 

 nate vertical bristles; second antennal joint elongate and third 

 shortened. 



DOLICHOCODIA, gen. nov. 



Near Myiocera, from which it differs as follows : Head conspic- 

 uously elongated anteriorly, apical cell open. xA.ntennse inserted on 

 or above middle of eyes ; proboscis slender and horny, with long fili- 

 form palpi which are but slightly thickened apically and bear very 

 long bristles ; parafacials wider ; long axis of head at antennal inser- 

 tion fully equal to that at epistoma ; head longer than high. Type, 

 Myiocera bivittata Coquillett, described from specimens collected by 

 the writer on the Rio Ruidoso, in the White Mountains of New 

 Mexico. 



EUCH^TOGYNE, gen. nov. 



Like Chcetogyne, but proboscis rather stout and only a little longer 

 than head height ; hind tibiae completely ciliate on outer edge, with no 

 bristles among the cilia. It agrees with Chcetogyne in having the 

 carina wide, flattened on its edge and conspicuously furrowed on 

 median line. Type, Hystrichodexia roederi Williston (Kansas Univ. 

 Quarterly, 11, pp. 77-78), described from Arizona (1 male). For 

 purposes of comparison, the following characters are given for cer- 

 tain allied genera : 



Hystrichodexia has proboscis shorter than head height. 



Paraprosena has carina narrow and thin. 



Chcetogyne has proboscis very long and slender, hind tibiae with 

 long macrochaetae among the cilia. 



Phorostoma has only a weak rudimentary facial carina. 



Buchcetogyne roederi Williston. — Three males in U. S. N. M. ; 

 two collected by the writer in Meadow Valley, Sierra Madre of 

 western Chihuahua, head of Rio Piedras Verdes, about 7,300 feet, 

 August 30 and September 2 ; and one labeled "Mexico, 400, Phoro- 

 stoma." 



Williston says in his description : "Third, fourth, and fifth seg- 

 ments opaque golden yellow." The so-called fifth segment shows 



