\'ol. xxix] ENTOMOLOGICAL NEWS I// 



A New Muscoid Genus from the Chiricahua Moun- 

 tains, Arizona (Dip.). 



By Charles H. T. Townsend, U. S. Bureau of Entomology, 

 Washington, D. C. 

 On August 4, 191 7, while seeking shelter in a shallow cave 

 under overhanging rock walls of South Fork Cave Creek, 

 Chiricahua Mts., Arizona, at an altitude of about 5500 feet, the 

 writer found a single female of a very remarkable fly resting 

 on the roof of a pocket at one end of the cave. Diligent search 

 made subsequently in similar situations failed to disclose addi- 

 tional specimens. The reproductive system v^'as extracted and 

 proves the fly to belong to one of the Calirrhoid groups, as 

 indicated by the external head characters. 



CHIRICAHUIA new genus. 

 Head in profile nearly twice as high as its length, in froni 

 view almost as wide as its height. Eyes proportionately small, 

 thinly but distinctly hair}-, extending about as low as tips of 

 antennae or about two-thirds' way to ^■ibrissae. Lower profile 

 of head rounded, bulged downward. \'ibrissal axis equal to 

 antennal axis. Clypeus broad, rather elongate-oval in outline, 

 widened below, in nearly same plane throughout, feebly cari- 

 nate on upper half. Epistoma in front view very short and 

 restricted, in same plane with clypeus, not produced, about 

 level with vibrissae. Facialia widely separated, only slightly 

 curved inward below, with sparse downwardly-directed bris- 

 tles on lowest third, the vibrissae widely separated and a little 

 longer than the bristles below them. Proboscis very short, less 

 than one-third head-height. Palpi reaching nearly to end of 

 proboscis, moderately stout, subcylindrical. Antennae inserted 

 far above eye-middle, extending scarcely over half way to oral 

 margin, second joint but little elongate, third joint about two 

 and one-half times length of second and of e\en width. Arista 

 bare, basal joints short, inserted nearly half way down third 

 antennal joint. Front very broad, taking up nearly half the 

 head-width at vertex, widening anteriorly, scarcely as long as 

 its average width. Parafrontalia averaging somewhat broader 

 than frontalia, narrowing posteriorly. Frontal bristles descend- 

 ing to base of third antennal joint. Outer vertical well devel- 



