788 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvii. 



Family HESPERIID.E. 



AMBLYSCIRTES VIALIS Edwards. 

 Six specimens. May 31, June 2, -i, T, IH. 



ERYNNIS COMMA Linnaeus, var. MANITOBA Scudder. 

 No specimens; Mr Coclcle has it. 



ANTHOMASTER AGRICOLA Boisduval. 

 Fourteen specimens, July T, 11, 12, 28 (Frye Creek), Auf^ust 3, 5. 



PAMPHILA PAL/EMON Pallas. 



No specimens; Mr. Cockle has taken it. 



THORYBES PYLADES Scudder. 



No specimens; it is in Mr. Cockle's collection. 



THANAOS ICELUS Lintner. 



Four specimens, May 29, June <!, 8, 10. 



THANAOS LILIUS, new species. 



Two specimens, May 31, June 4. This form resembles luciUus 

 Lintner, but is larger, the wing more variegated with brown, which 

 shows distinctly in a patch at the end of the cell, cut by an erect dark 

 line on the cross vein. Otherwise it is very similar. The size is that 

 of '^iiiartlalis^ but the markings are diffused and not as contrasted as in 

 that species. It is the western representative of luciliufi, probal)ly a 

 geographical race of it, but as much entitled to specific rank as several 

 other species of the genus. I have specimens from Easton, Washing- 

 ton (Koebele), and Yosemite Valley, California, June 16 and August 5 

 (Dyar). 



Ty2)e.—Cvit. No. 7333, U. S. National Museum. 



HESPERIA MONTIVAGA Reakirt. 



No specimens; a few were seen, l)ut escaped capture. Mr. Cockle 

 has the species. 



HESPERIA C^SPITALIS Boisduval. 



Six specimens. May 29, June 2, 6. 



Family SPHINGID^. 



HEMARIS DIFFINIS Boisduval, var. THETIS Grote and Robinson. 



Three specimens, May 30, 31, June 15, at flowers of lilac. Others 

 were seen, but not captured. The form has distinct red tips on the 



