oides rostralis._ It should be added that, at this
writing, the lack of ideally complete material from southwestern
Colorado leaves some doubt as to the range of variation properly to be
included within the geographic range of _T. t. fossor._ Consequently,
study of a larger number of specimens from more localities in Colorado
may show that the boundary between the geographic ranges of _T. t.
fossor_ and _T. t. rostralis_ should be shifted from where we have
tentatively placed it.

_Specimens examined._--Total number, 168. Unless otherwise indicated,
those from Colorado are in the United States National Museum, Biological
Surveys Collection, and those from Wyoming are in the Museum of Natural
History of the University of Kansas.

=Colorado.= _Routt Co._: Hahns Peak, 2; Hayden, 1. _Jackson Co._ Pearle,
North Park, 9000 ft., 2; Canadian Creek, North Park, 6; 5 mi. E Canadian
Creek, 1; Rabbit Ear Mts., Arapaho Pass, 5. _Larimer Co._: Elkhorn, 7000
ft., 1; Estes Park, 7. _Grand Co._: Coulter, 4. _Boulder Co._: Longs
Peak, 3; Gold Hill (the skin only; skull does not belong), 1; 3 mi. S
Ward, 9000 ft., 10 (K. U.); 5 mi. W Boulder, 7. _Gilpin Co._: Blackhawk
(U. S. N. M.), 2. _Jefferson Co._: Golden, 1; Golden foothills, 7300
ft., 1. _Park Co._: Como, South Park, 9800 ft., 1. _El Paso Co._:
Cascade, 1 (too young for certain sub-specific identification).

=Wyoming.= _Carbon County_: 13 mi. E and 6 mi. S Saratoga, 8500 ft., 1;
14 mi. E and 6 mi. S Saratoga, 8800 ft., 1; 7 mi. S and 11 mi. E
Saratoga, 5; 8 mi. S and 6 mi. E Saratoga, 10; 10 mi. N and 14 mi. E
Encampment, 8000 ft., 2; 10 mi. N and 16 mi. E Encampment, 8000 ft., 1;
8 mi. N and 16 mi. E Encampment, 8400 ft., 10. _Albany Co._: 2-1/4 mi.
ESE Browns Peak, 10300 ft., 7; 3 mi. ESE Browns Peak 10000 ft., 5; 2 mi.
S Browns Peak, 10600 ft., 7; 3 mi. S Browns Peak, 1; 2 mi. E and 1/2 mi.
S Medicine Bow Peak, 10800 ft., 2; 5 mi. N Laramie, 7200 ft., 1; 1 mi. E
Laramie, 7164 ft., 18; Laramie Mts., 10 mi. E Laramie (8500 ft., 2; 9000
ft., 1), 3 (U. S. B. S.); 5-1/2 mi. ESE Laramie, 8500 ft., 4; 8 mi. E
and 4 mi. S Laramie, 8600 ft., 5; 8 mi. E and 6 mi. S Laramie, 8500 ft.,
1; 15 mi. SE Laramie, Pole Mtn., 8200 ft., 3 (U. S. B. S.); 1 mi. SSE
Pole Mtn., (8250 ft., 4; 8350 ft., 6), 10; 1 mi. S Pole Mtn., 8350 ft.,
2; 2 mi. SW Pole Mtn., 8300 ft., 6; 2-1/2 mi. S Pole Mtn., 8340 ft., 1;
3 mi. S Pole Mtn., 1; Woods P. O., 2 (U. S. N. M.); Fort Russell, 1 (U.
S. N. M.); Sherman, 2