38 U. S. NATIONAL MUSEUM BULLETIN 209 



StM's description of his ochroptera is meager, but agrees with the 

 present form perfectly and there are no other species of the genus in 

 California. The possibihty that he may have had a Cryptocheilus 

 instead of a Hemipepsis has been considered but seems remote in 

 view of the fact that the two other species of Hemipepsis that St^l 

 described at the same time (the Ethiopian iodoptera and ochropus) 

 are kno^vn to have been correctly placed. 



Specimens (58 cf, 66 9): From California (Antioch, Benicia, Ben- 

 ton Station in Modoc County, Berkeley, Brentwood, Bj^ron, Camp 

 Baldy in Los Angeles County, Coalinga, Colton, Concord, Davis, 

 Escondido, Hastings Reserve in Monterey County, Humboldt County, 

 Jamesburg, iVlenlo Park, Middleton, Mill Valley, Morgan Hill, 

 Mountain View, Niles, Palm Desert in Riverside County, Redwood 

 City, San Diego County, San Joaquin Experimental Range in Madera 

 County, San Jose, San Rafael, Santa Paula, Sonoma County, Stan- 

 ford University, and Telsa) ; and Nevada (Buffalo Valley in Lander 

 County). Also, there are a few specimens somewhat intermediate 

 to the subspecies ustulata from Arizona (Pima County and Springer- 

 ville) and Nevada (Mesquite, Pyramid, and Reno). 



Dates of collection are from Apr. 15 at Berkeley, Calif., to October 

 at Mountam View, Calif. Most of them fall in the summer months. 



This subspecies appears to be common in the Upper and Lower 

 Sonoran faunas of middle and southern California. Specimens from 

 southern California (San Diego, etc.) are somewhat intermediate to 

 the subspecies ustulata, and additional more or less intermediate 

 forms are on hand from Nevada, Utah, and northern Arizona. The 

 Utah intermediates and most of those from northern Arizona are 

 recorded under ustulata ustulata, as they seem to fit best there. 



3. Hemipepsis mexicana (Cresson) 



Mygnimia mexicana Cresson, 1867, Trans. Amer. Ent. Soc, vol. 1., p. 143, 9- 

 Lectotype: ? , Vera Cruz, Mexico (Philadelphia). 



Forewing 11.5 to 18 mm. long in the male, 17 to 22 mm. long in 

 the female; lateral ocellus separated from the eye by about 1.0 to 

 1.5 its diameter in the male, and by about 1.0 its diameter in the 

 female; head and thorax with suberect hairs, moderately dense in 

 the male and sparse in the female; clypeus of male with some suberect 

 hair of moderate length; clypeus of female with a subapical row of 

 4 to 8 long suberect hau's, above which are a few shorter suberect 

 hairs that are less than a third as long as the subapical row ; nervellus 

 joining the mediella only slightly beyond (about 1 to 2 times the 

 width of the vein) the cubitella; under side of last segment of female 

 tarsi with a median basal row of about 2 or 3 bristles, these all basad 



