94 
PRELIMINARY LIST 
Acinopterus acuminatus VanD. Det. VanDuzee. 
Colorado (VanDuzee, 4). 
Steamboat Springs, July 26tli (Gillette). 
Bcaphoideus immistus Say. Det, VanDuzee. 
Fort Collins, August 18th, on black walnut (Baker). 
Phlepsius cinereus VanD. Det. VanDuzee. 
Colorado (VanDuzee, 4). 
Fort Collins, August 25tli (Baker). 
Phlepsius excultus Uhl. 
Denver, August 18th; Pueblo (Uhler, 5). Colorado (VanDuzee, 4). 
Phlepsius irroratus Say. 
Suburbs of Denver and Valley of the Arkansas (Uhler, 5). 
Phlepsius ovatus VanD. Det. VanDuzee. 
Colorado (VanDuzee, 4). 
Horsetootli Gulch, ten miles south-west of Fort Collins, 
April 25th to May 18th; Bist Canon, eight miles north-west 
of Fort Collins, June ISth; Dolores, May IStli (Gillette). 
Fort Collins, October 7tli; foot-hills five miles west of Fort 
Collins, during the winter hibernating under stones (Baker). 
Tliaiiiiiotettix atriclorsum VanD. Det. VanDuzee. 
Colorado (VanDuzee, 4). 
Spring Canon and Dixon’s Canon, June 30th; Montrose, 
June 24; Dolores, June 18th (Gillette). 
T'haiiiiiotf^ttix helli Uhl. Det. VanDuzee. 
Manitou (Uhler, 5). Colorado (VanDuzee, 4). 
Fort Collins, May 8th; Soldier Canon, five miles west of 
Fort Collins, May 19tli; Estes Park, July 11th; North Park, 
July 20th; Steamboat Springs, July 26th; Trinidad, May 
14th; Silverton, June 20th; Ouray, June 22d; Dolores, June 
ISth (Gillette). Fort Collins. May 18th to August 18th on 
alfal fa and July 29th on cultivated beet; Horsetootli Gulch, 
genus in Can. Ent. XXV, p. 285, one division is stated as having “longer elytra with well 
developed appendix.” It would seem that in the former paper the genus is properly 
characterized while, between those species which have elytra as long as abdomen or 
longer and with a well developed appendix, such as anthracinus, bicolor, striatulus, 
instabilis and obtutus, and some species of the genus Thamnotettix, we find no "-ood 
generic differences. ° 
