40. THAMNOPHIS 799 



(road to Nestucea between Grand Ronde and Dolph), Lin- 

 coln (road between Chitwood and Siletz River), Benton 

 (road between Pioneer and Siletz River, Alsea River near 

 Alsea), Linn (Albany), Lane (Elmira, June Lake and 

 Siuslaw River, Junction Lake and Deadwood Creek), Coos 

 (South Fork Coos River, Sumner, Coquille, Empire, Myrtle 

 Point), Douglas (Takeneitch Creek, Camas Mountains), 

 Curry (Langlois, Sixes River, Port Orford, Elk Creek, 

 Flores Creek, Rogue River, Harbor), and Jackson (Battle 

 Creek near Eagle Point) counties. 



From California, from Del Norte (Smith River, Cres- 

 cent City, Requa), Siskiyou (Sisson), Shasta (Burney 

 Creek), Humboldt (Redwood Creek, Orick, Carlotta, 

 Maple Creek, Samoa, Eureka), Mendocino (Covelo, Gar- 

 cia River, Sherwood, Willets, Mendocino, Albion River 

 near Comptche), Sonoma (Kidd Creek, Skaggs Springs), 

 Napa (Napa), and Marin (Inverness, Point Reyes Station, 

 Tocaloma, Willow Camp) counties. 



It is evident that T. sirtalis concinnus is not confined to 

 the extreme northwest, but, on the contrary, occupies a strip 

 close to the coast south nearly or quite to San Francisco Bay. 

 In the extreme north T. sirtalis concinnus ranges east far 

 from the coast, for the specimens from northern Idaho are 

 of this dark race and it is very possibly may be that Cope's 

 type of trilineata from Fort Benton, Montana, also belongs 

 here. A little farther south, however, concinnus does not 

 range far from the ocean, as is shown by the specimens from 

 Klamath County, Oregon, and Modoc County, California, 

 which represent the race T. sirtalis infernalis. 



Remarks. Although there is much variation in the 

 amount of dark pigment and in the width of the dorsal line, 

 these characters are sufficiently constant to serve for the 



