60 
PRELIMINARY LIST 
(Gillette). 
Diplocliis luridus Stal. 
Colo. (Uhler, 1 and 6). Colorado Springs, August 10th (Uhler, 5). Manitou 
and Garden of the Gods, July 13th to 16th (Packard—see Uhler, 5). 
Fort Collins, July 4tli; foot-hills five miles west of Fort 
Collins, June 30tli (Gillette). 
Diplodiis sociiis Uhl. 
Estes Park, July 16th (Gillette). 
Apioiuerns ftaviventris H. Schf. 
Larva from a bush in Clear Creek Canon, near mouth of Beaver Brook 
Gulch, August 7th (Uhler, 5). Brown variety on foot-hills at mouth of Clear 
Creek Canon, July 3d, in Garden of the Gods, and at Manitou, July 13th to 
15th (Packard—see Uhler, 5). 
Apioiuents pictipes H. Schf. 
Foot-hills eight miles south-west of Fort Collins, June 30th 
to July 12th; Silverton, June 20th (Gillette). 
Apionienis spissipes Say. 
Colo. (Uhler, 1 and 6), Valley of Arkansas, near Canon City, August 11th 
(Uhler, 5). Colo. (Snow—see VanDuzee, 5). 
Apioineriis ventralis Say. 
Colo. (Gillette—see Osborn, 1). Estes Park (Snow—see VanDuzee, 5). 
Fort Collins, May 14th on alfalfa (Baker). Foot-hills five 
miles west of Fort Collins, March 12th to June 12th; 
Giaymont, July 15th (Gillette). 
Pygolampis pectoralis Say. 
Fort Collins, April 6th under a board in edge of field 
(Baker). 
Spilalonhis geuiciilatiis Stal. 
Pueblo (John Lansing). 
Hygrotrechus reiiiigis Say. 
Colo. (Uhler, 1). Mountains in July (Carpenter—see Uhler. 6). From water 
on plains of Southern Colorado, June to July (Carpenter—see Uhler, 7). On 
still water along margin of Sloan’s Lake; very abundant on surface of 
irrigating canal proceeding from Canon of Arkansas, in August (LUiler, 5). 
Denver, July 10th; Boulder, June 20th; Manitou, July loth (Packard—see 
Uhler, 5). 
Near Fort Collins and in the adjoining foot-hills, common 
