276 NATURAL HISTORY BULLETIN. 



A. concavus Say. Colorado, Horn; Fort Collins. 



A. coloradensis Horn. Durango; Garland; Monument Gulch to Mont- 

 rose; Colorado Springs, June and July. 



A. INQUINATUS Hbst. Argentine Pass, Bowditch. 



A. pumieus Horn. South of Durango, Bowditch. Mr. Hayward reports it 

 from Aztec, New Mexico, twenty miles south of the Colorado line. 



A. TERMINALS Say. Argentine Pass; Mount Lincoln. 



A. CRUENTATUS Lee. Upper San Juan; Rico Road; Durango; La Junta; 

 Veta Pass; West Cliff. 



A. scabriceps Lec. Dixon Canon, April; Durango, July, Oslar. 



A. subTruncatus Lec. Colorado, Horn. 



A. FEMOraus Say. Summitville, Hayward. 



A. oblongus Say. Colorado, Horn. 



Ochod.EUS simplex Lec. Fort Collins, May and June; Little South, July; 

 Manitou, April, Gillette. 



O. biarmaTus Lec. Greeley, Wickham. 



O. MUSCUEUS Say. Denver, May; Fort Collins, June. 



O. sparsus Lec. Colorado, Horn. 



Bolboceras LAZARUS Fab. Southern Colorado, Leconte; Fort Collins, 

 June and July; Greeley. 



ODONTyEUS OBESUS Lec. Veta Pass; Buena Vista, one male. The occur- 

 rence of this species in the Rocky Mountains is interesting as it is other- 

 wise Pacific in distribution. 



Trox SCUTELLaris Say. Pueblo, Bowditch; La Junta, Hayward. 



T. SCABROSUS Beauv. Lamar. 



T. SUBEROSUS Fab. Pueblo; Fort Collins and vicinity. 



T. PDNCTATUS Germ. Lamar; vicinity of Colorado Springs; Fort Collins; 

 La Junta; Denver; a common form in the Southwest. 



T. TUBERCULATus De Geer. Vicinity of Fort Collins. 



T. GEMMUEATUS Horn. Durango, Hayward. 



T. sonor^; Lec. South Park region, Oslar; Florissant; Buena Vista; West 

 Cliff; Durango. 



T. unistriaTus Beauv. Colorado Springs. 



T. aTrox Lec. Near Long's Peak, Leconte; Fort Collins; Greeley. 



Hoplia eaTicoeeis Lec. Southern Colorado, Leconte. 



Dichelonycha backii Kirby. Vicinity of Fort Collins; near Brush Creek, 

 10,000 to 12,000 feet, Cockerell; Southern Colorado, Leconte; Garland; 

 Veta Pass; common at times. 



D. TruncaTa Lec. Durango, Oslar; Placerville; South Fork of San Miguel; 

 Mountains southwest of Montrose. 



D. SULCATA Lec. Chimney Gulch, June; Fort Collins, May; Garland; Veta 

 Pass, 9,100 feet. 



Serica vespertina Gyll. Horsetooth Gulch, May; Greeley; Colorado, 

 without definite record, Horn and Snow. Specimens which may be- 

 long here were taken at Buena Vista and Colorado Springs. 



S. SERICEA 111. Southern Colorado, Leconte. 



S. CUR v ata Lec. Southern Pueblo County, Cockerell. 



