258 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



bull, June 7-10); but I have before received the same form from the 

 same general region. 



Hesperia comus Edw. — Juniper Mountains, June 4 ; Mount Trumbull, 

 June 7-10. 



Hesperia tessellata Scudd. — St. George, April-May ; Mokiak Pass^ 

 April 28-30 or June 2 ; Mount Trumbull, June 7-10 ; Bear Valley, July 

 4; Beaver Mountains, July 18-20. 



Heliopetes ericetorum (Boisd.) Scudd. — Mokiak Pass, April 28-30 or 

 June 2 ; Mount Trumbull, June 7-10. 



Pholisora catullus (Pabr.) Scudd. — St. George, April-May ; Pine 

 Mountains, May 12. 



Heteropterus Ubya, nov. sp. — This species is placed provisionally in 

 the genus Heteropterus, of which Pap. morpheus Pall, is the type, but 

 differs from it to such an extent that it must undoubtedly be eventually 

 separated therefrom. 



The wings are uniform dark glossy brown above, with a tinge of 

 dark green ; the fringe concolorous, excepting on the upper half or more 

 of the fore wings, where it is albescent. Midway between the tip of the 

 fore wing and the apex of the cell is a conspicuous, though not large, 

 slightly oblique, white cross-band, interrupted by the nervules occupy- 

 ing the three lower subcostal interspaces, while there is an inconspicuous 

 white spot in the centre of the middle median interspace. Beneath, the 

 front wings are paler than above, with the markings repeated, some- 

 times (in male only f) with less distinctness, and with a hoary clouding 

 at the apex of the wing. Hind wings of the same ground-color, but 

 with such a sprinkling of olivaceous scales as to give a decided greenish 

 hue ; the inner margin as far as the submedian vein almost entirely 

 or quite white; a transverse band of squarish, snow-white spots of median 

 size cross the wing, represented particularly by equal spots in the sub- 

 costo-median and medio-submedian interspaces; midway between the 

 former and the base is a smaller, circular, snow-white spot, and occa- 

 sionally a few white scales midway between them in the costo-subcostal 

 interspace, which may properly be considered part of the median series ; 

 in addition, there is a series of submarginal, vaguely defined, roundish 

 or lunular white spots in the interspaces. 



The palpi are white beneath, dark brown above ; and this, together 

 with the shape of the wings, gives it a certain resemblence to Pholisora 

 catullus. Antennae white beneath, dark brown above, narrowly annu- 

 lated with white at the base of the joints of the stalk ; the club pur- 

 plish-black. Expanse of wings, 32™™ ; length of antennae, 7™™. 



1 <? , 2 5 . Beaver Dam, April 20-28. 



OcModes sonora Scudd. — Beaver Mountains, July 18-20. This species 

 has not been hitherto reported east of the Sierra I^Tevada. By what we 

 presume must be a clerical error, Mr. W. H. Edwards, in his recent 

 catalogue, places this as a synonym to Boisduval's Hesp. sylvanoides. 



