LEPIDOPTERA— 11ESPERIDAE— HESPERIA TESSELLATA. 787 



NISONIADES RUTILIUS, Scud. 

 Nisoniades Rutilius, Scud., MS. 



One individual, now in Mr. Scudder's hands for description, was taken 

 June 23 at Turkey Creek Junction. 



NISONIADES ICELUS, Lintner. 

 Nisoniades Icelus, Lintner, 23d Rep. N. Y. State Illus. Nat. Hist., 1872. 



One specimen was taken June 10 near Fairplay, South Park. 



PHOLISORA, Scud. 

 PHOLISORA CATULLUS, Cramer. 

 Niso?iiades Catullus, Morris. Syu. Am. Lep., 115. 



Specimens were brought by the expedition from Southern Utah. One 

 or two were seen near Denver early in June. 



LEUCOSCIRTES, Scud. 

 tLEUCOSCIRTES ERICETORUM, Boisd. 

 Syrichihus Alba, Edw., Proc. Ent. Soc. Phila., 1866. 



Brought in by the expedition of 1871, probably from Utah or Arizona. 

 The species is also found in California. 



HESPERIA, (Fabr.) Kirby. 



HESPERIA TESSELLATA, Scud. 

 Eesperia Tesxellata, Scud., Rep. Peabody Acad. Sci., 1871. 



This species is abundant throughout the West. In Colorado, it is found 

 on the wing during June and July. 



HESPERIA, sp. (J). 



A Hesperia, very closely allied to Centaurem, Rambur, frequents the 

 high peaks about Twin Lakes, where seventeen specimens were taken in 

 July, all above 11,000 feet elevation (timber line). 



Mr. Scudder assures me that this species is distinct from JRuralis, Boisd., 

 to which it was at first referred. It is probably not Ceiitaurece- ; but I have 

 scarcely sufficient material for comparison at hand to safely describe it as 

 distinct. 



