346 NORTH AMERICAN FAUNA. [No. 7. 



Cereus engelmarmi. 



This is tlie commonest and most widely diffused cactus of the genus 

 Cereus over the deserts of southern Nevada and southeastern Cali- 

 fornia, where it was found in the following localities: 



CALIFORNIA. 



Deep Spring Valley. — Tolerably common in the wash leading up 

 from Deep Spring Valley to the pass over the White Mountains ; in 

 full flower June 10. Found also on the Inyo Mountains. 



Panamint Mountains. — Common in places. 



NEVADA. 



Gold Mountain. — Tolerably common on the south slope above 1,550 

 meters (5,100 feet) ; in flower June 3. 



Timpahute and Desert Mountains. — Tolerably common on both slopes. 



Pahranagat Valley. — Common on rocky slopes j in full flower May 

 22-26. 



Pahranagat Mountains. — Common in places. 



Juniper Mountains. — Common; in flower May 5. 



Muddy Mountains. — Bather common; in full flower May 5. 



UTAH. 



Beaverdam Mountains. — Common, ranging from 730 to 1,350 meters 

 (2,400 to 4,400 feet) on the west slope, and from 1,100 to 1,300 meters 

 (3,600 to 4,300 feet) on the east slope; in flower May 10-11. 



Santa Clara Valley. — Occurs in places ; in flower May 11-15. 



Cereus mohavensis. 



This cactus grows in dense clumps in rocky places on the sides of 

 the Desert Ranges, usually in canons, and bears dark, purple-red 

 flowers. It was observed in the following localities: 



CALIFORNIA. 



White Mountains. — Common in places on the east slope above Deep 

 Spring Valley, beginning at an altitude of 1,900 meters (6,300 feet) and 

 ranging up to the summit of the divide; in flower June 10. 



Panamint Mountains. — Common in places along the summit, particu- 

 larly north of Telescope Peak; not yet in flower, April 17-19. 



NEVADA. 



Charleston Mountains. — Found in a few places on the west slope of 

 the Charleston Mountains above 1,550 meters (5,100 feet); beginning 

 to flower April 29. 



Pahranagat Mountains. — Found along the summit of the range; in 

 flower May 26. 



Highland Range. — Found on the west slope of the range; in Hower 

 May 20. 



Juniper Mountains. — Tolerably common in places among the junipers 

 from 1,820 to 2,050 meters (6,000 to 6,700 feet) in altitude; in flower 

 May 18-19. 



