UHLER ON INSECTS. 771 



Piosoma setosum Le C. 



Fouud only at Colorado Springs, x\ugust 13 to IG; not common ; living 

 beneath rubbish on the ground. 



Harimliis calUjinosus Fab. 



Very common at Denver, running among the den.se weeds, and some, 

 times concealed beneath stones and rubbish, August 6 to 18. One speci- 

 men from Clear Creek Canon. 



nari)alus ohlitus Le C. 



Distributed everywhere, as well upon the plains as up into the mount- 

 ains. I took specimens at Denver, high up Beaver Brook, near Colo- 

 rado Springs, in Manitou Park, and near Cailon City, August 5 to 18. 



HariKilus fallax Le C. 



In alluvial soil near Canon City, August 11 j not very abundant. A 

 few specimens were also found under stones in the vicinity of Colorado 

 City, August 16. Not seen near Denver. 



Hai'imlus ochropiis Kirby. 



A few specimens occurred west of Colorado Springs and near the 

 Garden of the Gods, August 13. 

 Harpalus sp. 



Found on the hills west of Denver, August 8. 

 BemMditim hifossulaUis Le C. 



In Clear Creek Canon and Beaver Brook Gulch, August G and 7; also 

 near the South Platte Eiver, west of Denver. 

 Bembidium americanum Dej. 



Very common near Sloan's Lake, west of Denver ; but I did not meet 

 with it in any other locality. 



Fara. DYTISCID.^. 



Laccopldlus decipiens Le C. 



Common in pools of water near Denver, August 5 to 8. Later in the 

 month, these pools had dried up, and their insect inhabitants were no 

 longer to be seen. 

 Bhantus binotatns Harris. 



Very abundant in the same pools as the preceding; also in Sloan's 

 Lake, August 8. 



Fam. HYDROPHILID^. 



HydrophUus triangularis Say. 



In the pools near Denver, August 8. None found elsewhere. 

 Tropisternus nimhatus Say. 



Very common in the pools of water on the plains in the vicinity of 

 Denver; also in Sloan's Lake, and in standing water near Colorado 

 Springs. 



