216 Journal New York Entomological Society. [Voi. xxiii. 



EXPLANATION OF PLATE XVIL 



Platypesa submacula, abdomen and part of wing. 



Platypesa minorata, hind tarsus. 



Platypesa elongaia, abdomen. 



Platypesa vehitina, parts of wing. 



Platypesa submacula, hind tarsus. 



Platypesa nitida, part of wing. 



Platypesa elongata, hind tarsus. 



Platypesa taniata, abdomen, male and female variety. 



Platypesa nitida, hind tarsus. 



Platypesa tecniata, part of wing. 



Platypesa elongata, part of wing. 



NEW WESTERN AND SOUTHWESTERN 

 MUSCOIDEA 



By Charles H. T. Townsend, 

 Washington, D. C. 



The following are descriptions of some new muscoid genera and 

 their genotypes from the western United States and the southwest of 

 North America, including the northwest of Mexico. The region 

 which they inhabit extends from Idaho and Yellowstone Park to 

 Texas, California and western Chihuahua. 



Family CALIRRHOID.E 



COCKERELLIANA new genus. 



Genotype, Cockcrdliana capitata Townsend new species. 



Female. — Form rather narrowed. Lower profile of head nearly 

 three fifths of frontal profile, the occiput being lightly bulged. Facial 

 profile retreating, the vibrissal axis distinctly less than antennal. 

 Clypeus rather shortened, broadening but little below, carina ves- 

 tigial. Epistoma elongate, narrowed distinctly by vibrissal angles. 

 Facialia bare, flattened, rather narrow, not prominent, Vibrissae set 

 well above oral margin. Peristomalia long, curved in profile, with a 

 few widely separated bristles on lower extent. Proboscis short, 



