354 PROCEEDINGS OF THE ACADEMY OF [May, 



0. haydeni (Gabb.). Weber canyon, Utah. 



0. h. oquirrhensis (Hemph.). Oquirrh Mountains, Utah. 

 0. h. gabbiana (Hemph.).* Oquirrh Mountains, Utah. 

 0. h. utahensis (Hemph.). Oquirrh Mountains, Utah. 

 0. h. corrugata Hend. and Dan.* Small, nearly isolated moun- 

 tain, southeast of Webster, Utah. 

 0. h. hybrida (Hemph.).* Near Logan, Utah. 

 0. h. betheli Pils. and Ckll.* Glen wood Springs, Colorado. 

 Form alta Pils. and Ckll. Glenwood Springs, Colorado. 

 O. h. mixta Pils.* Glenwood Springs, Colorado. 

 O. hemphilli (Newc). White Pine mining district, Nevada. 



O. h. eurekensis Hend. and Dan. Eureka, Utah. 

 O. tenuistriata Hend. and Dan. Between McCammon and Hot 



Lava Springs, Idaho. 

 O. carinifera Pils. Garrison, Montana. 

 0. bruneri (Ancey). Montana. (Not seen by the author, and 



unknown in American collections.) 

 0. elrodi Pils.* MacDonald Lake, Mission Range, Montana. 

 O. yavapai Pils.* Yavapai Co., Arizona, etc. 



O. y. neomexicana Pils.* San Miguel Co., New Mexico. 



0. y. compactula Ckll. Pecos canyon, New Mexico. 



0. y. extremitatis Pils. and Ferr.* Grand Canyon, Ariz.; also 



northern Wyoming. 

 O. y. angelica Pils. and Ferr. Grand Canyon, Arizona. 

 0. y. profundorum Pils. and Ferr. Grand Canyon, Arizona. 

 0. y. marise Bartsch. Squaw Creek, near mouth Gallatin 

 Canyon, Montana. 

 O. concentrata (Dall).* Huachuca Range, Arizona. 



Form huachucana Pils.* Huachuca Range, Arizona. 

 O. metcalfei Ckll.* Black Range, New Mexico. 

 O. pilsbryi Ferriss.* Mineral Creek, Chloride, Sierra Co., New 



Mexico. 

 O. barbata Pils.* Chiricahua Range, Arizona; also Mogollon 

 Range, N. M. 

 0. b. minima Pils. and Ferr. Chiricahua Range, Arizona. 

 O. socorroensis Pils. Socorro Co., New Mexico. 



Subgenus Radiocentrum Pils. 



O. avalonensis Hemph. Catalina Island, California. 

 O. CHiRiCAHUANA Pils.* Cave Creek Canyon, near the cave, 

 Chiricahua Range, Arizona. 

 0. c. percarinata Pils. and Ferr. Big Emigrant Canyon, and 



Paradise Canyon, Chiricahua Range, Arizona. 

 0. c. obsoleta Pils. and Ferr. White Tail Canyon, Chiricahua 

 Range, Arizona. 

 O. clappi Ferriss.* Cave Creek, etc., Chiricahua Range, Arizona. 

 0. c. emigrans Pils. and Ferr. Big Emigrant Canyon, Chiri- 



cahuas. 

 O. c. cataracta Pils. and Ferr. Falls of Cave Creek, Chiri- 

 cahuas. 



