628 PROCEEDINOii OF THE NATIONAL MUSEUM. vol. 49. 



front not produced, epistoma not prominent, no ocellar bristles. 

 Arista short-hairy. Palpi very slender. Cheeks very narrow in both 

 sexes, eyes extending far below oral margm. Face much narrower; 

 parafacials very narrow in both sexes, especially so m male. No 

 median marginal raacrochaetae on first abdominal segment in either 

 sex. Claws very short in both sexes. Tarsi of both sexes slender. 

 Hind crossvein straight, halfway between small crossvein and 

 cubitus. 



Differs from Anthoica and related genera by short claws, narrow 

 male front, etc. 



Differs from Eumyohia by the short proboscis, and by most of the 

 characters of Leskia as to face and front, venation, etc. 



Differs from Ophirion by the slender tarsi and short claws. 



SIPHOLESKIA, new genus. 



Genotype. — Drepanoglossa occidentalis Coquillett, Can. Ent., vol. 27 

 1895, p. 126; Kev. Tach., 1897, p. 74, referred to Epignmyia. 



Differs from LesTcia as follows: Proboscis elongate and slender, the 

 part beyond geniculation much longer than head-height. Palpi 

 longer, proportionately rather more slender. Epistoma much more 

 prominent, projected anteriorly, the vibrissae set well back from oral 

 margm. Apical cell widely open, endmg a little before wingtip. 

 Bend of fourth vein widely rounded, its course at cubitus being merely 

 a broad curve. 



The genus may be distinguished at once from Parajischeria Town- 

 send by the longer proboscis, much narrower parafacials, and siimate 

 hind crossvein; from Neojischeria Townsend by the long proboscis and 

 absence of discal macrochaetae on abdomen. 



MYOBIOPSIS, new genus. 



Genotype. — Myohiopsis similis Townsend, new species, for LesJcia 

 aiwlis Coquillett, Rev. Tach., 1897, p. 67, part (not Dexia analis Say, 

 Jom-n. Acad. Nat. Sci. Phila., vol. 6, 1829, p. 177), holotype being 

 specimen labeled Andover, Massachusetts (Riley Coll.). Holotype, 

 No. 19149, U.S.N.M., male. Paratypes include TD 4359, female; 

 4360, male. 



Differs from Eumyohia as follows : Front and face about same length 

 in both sexes. Imier vertical bristles present in male. Proboscis 

 shorter. No median macrochaetae on first abdominal segment in 

 either sex. Costal spuie absent or vestigial. Apical cell practically 

 closed in tip of wing. Hmd crossvein about in middle between small 

 crossvein and cubitus m male, slightly out of middle in female. 



