4 Annals Entomological Society of America [Vol. XII, 



The first of these occupies the following regions: the coastal 

 belt of southeast Alaska and British Columbia with the adjacent 

 islands, the Puget Sound Basin of Washington and the Willa- 

 mette Valley of Oregon, and extends fully up to the five thousand 

 foot level on the Cascades. This contains the Vancouveran 

 fauna in its purest form and with its species but little modified 

 throughout its extent. Characteristic Coleoptera of this area 

 are Omus dejeani R.eiche, Cychnis tuber culatus Harr., Carabus 

 taedatus Fab., in its typical form, Nebria mannerheimii Fisch., 

 Pterostichus herculaneus Mann, and Pterostichus validiis Dej., 

 and Miscodera insignis Mann. 



Next we have a subfauna that might be called the Pacific 

 Maritime. This occupies that very wet region to the west of 

 the Olympic and Coast Ranges of Washington and with sec- 

 ondary modifications taking place chiefly in northwestern 

 Oregon, in southwestern Oregon and northwestern California, 

 in Mendocino County, California, and south of the Russian 

 River in California,- extends down the coast as far as middle 

 Monterey County, California. Within this maritime area, the 

 fauna as far as the species are concerned, is quite similar to that 

 found in the pure Vancouveran, but the form and appearance 

 of many of the species has changed'. Melanism is markedly 

 evident here and is to be noted in such widely separated families 

 as the CarabidcB, the Elateridce, the Cantharidce (Lampyridce) , the 

 ScarabaeidcE, and the Rhynchophora. Increase in size is also 

 to be noted with regard to many of the species. To illustrate 

 this, I will cite but a few examples. In the Carabidce, in the 

 genus Scaphinotus, we have the species 5. angulatus Harr. 

 which is of a metallic purple color in those specimens dwelling 

 in the Puget Sound Basin and the Willamette Valley, and 

 absolutely black in those which are found in the wet coast 

 belt, though otherwise unmodified. In southwestern Oregon 

 and northwestern California, a related but distinctly different 

 species, 5. behrensi Roesck, is found replacing the above. 

 Scaphinotus angusticollis Fisch. in the pure Vancouveran region 

 from southeastern Alaska to the eastern side of the- Willamette 

 Valley, is typically of a ferruginous color. West of the Olympics 

 and Coast Range of Washington and the Willamette river in 

 Oregon, it is absolutely black. In Washington, it is structurally 

 the same as the typical form; in western Oregon, larger and with 



