264 NATURAL HISTORY BULLETIN. 



MonoTOMA PICIPES Hbst. Ouray. 

 M. FUI/vipes Melsh. Garland. 



BYRRHID^E. 



Cytilus SERICEUS Forst. Colorado, Ulke. 



C. TRiviTTATUS Melsh. Leadville; Red Cliff; Moose Mountain, 12,000 feet. 



Byrrhus americanus Lee. Veta Pass, Schwarz. 



B. CYCLOPHORUS Kirby. Colorado, Putnam. 



B. GEMINATUS Lee. Veta Pass, 9,400 feet. 



B. kirbyi Lee. Mount Lincoln; Leadville. 

 Syncalypta grisea Lee. Garland. 



Limnichus monTanus Lee. La Veta; an undetermined species is in my 

 cabinet from Buena Vista. 



GEORYSSIDJE. 



Georyssus pusiixus Lee. Garland. 



PARNIDiE. 



Dryops STRIATUS Lee. West Cliff and other points in Custer County; Gar- 

 field County, Cockerell; below Bridal Veil Falls; Colorado Springs; 

 Manitou; Spring Canon; Garland; La Veta; Veta Pass; Pagosa Springs; 

 Upper San Juan; Durango. Often exceedingly abundant under stones 

 in running water. 



Elmis concolor Lee. Colorado Springs, one pair, Wickham. Taken in 

 June. 



E. corpulEnTUS Lee. Veta Pass, 9,400 feet; Buena Vista. Mr. Bowditch 

 has a new species from the Upper San Juan. 



HETEROCERIM. 



HeTEROCERUS paixidus Say. La Junta, Bowditch. 



H. undatus Melsh. Buena Vista; the form mollinus Kies., comes from 

 Ouray. The form substriatus is known from Alamosa; Garland; Moun- 

 tains southwest of Montrose; South Fork of San Miguel. 



H. collaris Kies. San Luis Valley; Durango. 



H GEMMATUS Horn. Gunnison, Hayward. 



DASCYLLIM. 



Eucinetus terminaus Lee. West Cliff. 



Cyphon concinnus Lee. Rist Canon; Horsetooth Gulch. 



C. variabilis Thunb. Fort Collins; West Cliff. 



ELATERIDiE. 



DELTOMETOPUS amcEnicornis Say. Colorado Springs, June, Wickham. 

 Anelastes drurii Kirby. Pagosa Springs, Oslar; Mountains southwest of 



Montrose; Upper San Juan; West Cliff; Dome Rock; Wales' Canon, Pueblo 



County, Cockerell. 

 Epiphanis CORNUTUS Esch. South Fork of San Miguel, Hayward. 



