116 Journal New York Entomological Society. [Vol. xin. 



T. mexicana Herrich-Schaeffer. 



Occurs in Colorado and Nevada. 



T. aemilia Skinner. 



Occurs in the mountains of California and Oregon. I think it is 

 not specifically distinct from mexicana H.-S., but only a local race of 

 that species. 



Genus TELEGONUS Hiibner. 

 T. hahneli Staudinger. 



Reported from our southern border. 



Genus CABARES Godman & Salvin. 

 C. potrillo Lucas. 



Reported from our southern border. 



SECTION B. 



Key to the Genera. 



i. Club of the antenna; thickened at the end, which is obtuse and bare 2. 



Club of antennae tapered at the end 5. 



2. No costal fold in the male Hesperopsis. 



A costal fold present in the male 3. 



3. A pair of long lobes covering a bare hollow at base of abdomen in male. 



Scelothrix. 

 These lobes short or absent 4. 



4. Hind tibiae with a hair pencil Heliopetes. 



Hind tibiae without a hair pencil Pyr^us. 



5. Point of club of antennae obtuse 6. 



Point of club sharp 11. 



6. Fore wings with no costal fold Chiomara. 



Fore wings with a costal fold in the male 7. 



7. Fore wings with a sinus at anal angle ; two excavations on hind wing...Systasea. 



Fore wings with a small sinus; hind wings crenulate 8. 



Fore wings entire 9. 



S. Hind legs of male with a hair pencil Celotes. 



Hind legs with no hair pencil Staphylus. 



9. Costal fold of the male long, over half the margin 10. 



Costal fold short, less than half the margin Pholisora. 



10. Third joint of palpi moderate, less than twice as long as wide Thanaos. 



Third joint long, over twice as long as wide Bolla. 



11. Apex of fore wing falcate Eantis. 



Fore wings not falcate 12. 



12. No costal fold in the male Grais. 



A costal fold present in the male 13. 



13. Wings elongate; hind wings wavy Timochares. 



Wings trigonate ; hind wings entire Melanthes. 



