244 NATURAL HISTORY BULLETIN. 



Deronectes caTascopium Say. In the Putnam list; West Cliff; Ouray. 

 D. griseostriatus De Geer. Alamosa; Gunnison; Durango; the last two 



records come from Mr. Bowditch. 

 D. STRIATEEEUS Lee. Florissant; Colorado Springs; Durango, Bowditch; 



Dolores; Howe's Gulch and Rist Canon, April; Garland; Alamosa. 

 Hydroporus 12-lineatus Lee. A specimen from Georgetown is presumed 



to belong here. 

 H. septenTrionalis Gyll. Durango and San Juan River, Bowditch. 

 H. rivaus Gyll. Georgetown; Florissant; the latter record is for the form 

 congruus Lee. 



H. caliginosus Lee. Reported under the name pubernlus, from the 

 Leavenworth Valley. 



H. TENebrosus Lee. Montrose, Bowditch. 



H. Tartaricus Lee. Upper San Juan and Leavenworth Valley, Bowditch; 

 Horsefly Peak Divide, Hayward. A species closely allied to this and to 

 morio Sharp, was taken at Leadville and Breckenridge. 



H. Tristis Payk. Abundant in Ute Pass, below the Bridal Veil falls, Snow. 



H. contractulus Mann. Veta Pass, Bowditch. 



H. oblitus Aube. Colorado Springs. 



H. vilis Lee. Durango, Bowditch; Montrose; Georgetown, Wickham; 

 Red Mountain Road. 



H. belfragei Sharp. Colorado, Snow, (record from Bowditch). 



Ieybius sub^Eneus Er. Placerville, Bowditch. 



I. viridi^Eneus Cr. A specimen from Denver is doubtfully referred here. 



I. ouadrimacueaTus Aube. Colorado, Ulke. 



I. angustior Gyll. Gunnison, Bowditch. 



I. biguTTalus Germ. Abundant below Bridal Veil falls, Snow. 



I. CONFUSUS Aube. Denver, Packard. 



CopTotomus eongulus Lee. Colorado, Crotch. 



Agabus cordaTus Lee. Abundant in a. small stream in Williams Canon, 

 near Manitou; Gunnison; Montrose; Horsefly Peak; Georgetown. 



A. intersectus Cr. West Cliff; Georgetown; Ouray; Manitou, Bowditch; 

 Placerville. 



A. seriatus Say. Durango; Upper San Juan; Gunnison; Manitou, Bow- 

 ditch; Garland; La Veta; West Cliff. 



A. ldgens Lee. Vicinity of Fort Collins, March and April; Colorado 

 Springs. 



A. TEXanus Sharp. Canon City, Bowditch. 



A. punctueatuS Aube. Placerville, Bowditch. 



A. T.Enioeatus Harr. Colorado, Putnam. 



A. disintegrate Cr. Denver, Packard. 



A. ausTinii Sharp. Florissant; Georgetown; Gunnison; Leavenworth Val- 

 ley, 10,000 to 11,000 feet. 



A. STRIGULOSUS Lee. Florissant. The record is under the name nanus. 



A. morosus Lee. West Cliff; also in the Putnam list. 



A. infuscatus Aube. Leavenworth Valley; Durango; Williams River. 



A. obsoletus Lee. San Luis Valley and Gunnison, Bowditch. 



