94 
PRELIMINARY LIST 
Acinopterus acuminatus YanD. VanDuzee. 
Colorado (YanDuzee, 4). 
Steamboat Springs, July 26tli (Gillette). 
Scaphoideus immistus Say. ^ anDuzee. 
Fort Collins, August 18th, on black walnut (Baker). 
Phlepsius cinereus YanD. VanDuzee. 
Colorado (YanDuzee, 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 YanD. P e t- ^ anDuzee. 
Colorado (YanDuzee, 4), 
Horsetooth Gulch, ten miles south-west of Fort Collins, 
April 25th to May 18th; Rist Canon, eight miles north-west 
of Fort Collins, June 13th; Dolores, May 18th (Gillette). 
Fort Collins, October 7th; foot-hills five miles west of Fort 
Collins, during the winter hibernating under stones (Baker). 
Thamnotettix atridorsum YanD. Pot. A anDuzee. 
Colorado (YanDuzee, 4). 
Spring Canon and Dixon’s Canon, June 30th; Montrose, 
June 24; Dolores, June 18th (Gillette). 
Thamnotettix belli Uhl. Det. ^ anDuzee. 
Manitou (Uhler, 5). Colorado (YanDuzee, 4). 
Fort Collins, May 8th; Soldier Canon, five miles west of 
Fort Collins, May 19th; Estes Park, July 11th; North Park, 
July 20th; Steamboat Springs, July 26th; Trinidad, May 
14th; Silverton, June 20th; Ouray, June 22d; Dolores, June 
18th (Gillette). Fort Collins. May 18th to August 18th on 
alfalfa and July 29tli on cultivated beet; Horsetooth 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 good 
generic differences. 
