284 MALE GENITALIA OF NORTH AMERICAN HESPERIIDAE 



The drawings were made from the genitahc mounts by Miss 

 Helen Winchester. 



The references under the species refer to previous figures of the 

 male genitalia. 



The records given are of insects which we have observed and in 

 the collections of the Academy of Natural Sciences of Philadel- 

 phia, the American Entomological Society, and of R. C. Wil- 

 liams, Jr. 



All references to genitalia in this paper refer to those of the 

 male insect. 



1, Hesperia centaureae Rambur (Fig. 1.) 



Scudder, Butterflies Ea^t. U. S. and Canada, in, pi. 35, fig. 45, (1889). 

 Reverdin, in Oberthur, Etud. Lep. Comp., xn, pi. ccccn", fig. 5202, (1916). 



This species has both the costal fold and ti])ial tuft. American 

 and European specimens are the same genitalically. 



There is a single, beaked, terminal projection to the uncus; 

 the scaphium is simple with small dentations on the external 

 portion; the valve is of a pattern somewhat similar to that of 

 7-iiraUs, but with the central terminal recurved projection long 

 and extended outwardly bayonet-shaped; the aedoeagus is 

 simple. 



Records: New Jersey, lona, April (Skinner), Great Notch, 

 Essex County; Virginia, Montgomery Count}^ April; Color- 

 ado, Wilson Peak, Hall Valley, August (Oslar); Alberta, 

 Laggan. 



2. Hesperia ruralis Boisduval (Fig. 2.) 



This species has both costal fold and til)ial tuft. 



Ruralis has a rather large uncus with two stout, well separated, 

 beaked projections above, and two strong hooks below, the 

 latter curving upwards, with a connecting band from base to 

 base curv(Ml dorsally. The valve is si)lit at its terminus and the 

 ventral lobe carries a recurved process armed with a num])er of 

 stout teeth. The aedoeagus is simple. 



Records: Colorado, Chimney Gulch, Golden, Bear Creek, 

 Jefferson County (Oslar); Utah, Silver La.k(^; California, 

 Albion, May (Sinclair), Santa Cruz, April and May (Dodge), 

 Ti-inity C^ounty, June (Fox), Santa Clara County; Washington, 

 Port Blakeley, Olympia; Oregon, Fort Klamatli, Ashlaiid, 



