13. COLUDRID.^ 



in three, or 3%j 19—19—17 in one, or 1%; 20—21 — 

 19 — 17 in one, or 1%; and 20 — 21 — 17 — 17 in one, or 

 1%. The gastrosteges vary in number from 148 to 182, 

 males having from 159 to 182, females from 148 to 177; 

 the average in fifty-three males is 174.2, in forty-seven 

 females, 169. The urosteges vary from 67 to 95, males 

 having from 79 to 95, females from 67 to 83; the average 

 in forty-four males is 86, in thirty-five females, 76. 



Distribution. — This subspecies, in typical form, is found 

 over eastern Washington and Oregon, ranging thence east 

 across Idaho to Utah, south across Nevada to eastern Cali- 

 fornia in the vicinity of Mono Lake, and to northern 

 Arizona. Positively identified specimens have been taken 

 as follows: 



In Washington, in Stevens (Diamond Lake, Spring- 

 dale), Walla Walla (Prescott, Wallulla), and Columbia 

 (Humpeg Falls) counties. 



In Oregon, in Lake (Walker Lake, Buck Creek, Bridge 

 Creek), Harney (Silver Creek, Burns), Malheur (River- 

 side), Umatilla (Umatilla, Meacham), and Wallowa (Wal- 

 lowa), counties. 



In Idaho, in Bonner (Sand Point, Hope), Kootenai, 

 Shoshone (Wardner), Nez Perce (vie. Lewiston), Lemhi 

 (Salmon Mountains), Washington (Weiser), Valley (Pay- 

 ette Lakes), Custer (Challis Valley), Ada (Boise), Camas 

 (Malad River Canyon), Blaine (Ketchum, Guyer Hot 

 Springs), Butte (Arco), Jerome (Shoshone Falls), Twin 

 Falls (Snake River near Salmon Falls), Cassia (Cotton- 

 wood Creek, Albion), Bingham (Fort Hall), Oneida 

 (Malad), and Bear Lake (Bear Lake), counties. 



In Utah, in Cache (Logan), Davis ( Woods Cross), 

 Salt Lake (Fort Douglas), Wasatch (Provo Canyon), Utah 



