240 AMERICAN JOURNAL 



t. * — A. Columbiana, and M. Vancouverensis, extending 

 north to lat. 60°. 



A. Germana, typical, was from " Oregon," but seems to ex- 

 tend to t. 



M. sportella, from near z to s. M. Vancouv. also passes 

 eastward to J, north of lat. 49°. 



z. f — 0. devia, has a very narrow range. 



r. § — H. Townsendiana, between Cascade range and coast, 

 then appears to go east like Vancouverensis, and along Rocky, 

 mountains to "south-eastern Idaho." 



I ||. — Ang. strigosa, found near South Pass and at the 

 northern and southern ends of line, but only surmised to occur 

 between. Also at f t- 



•f. — H. polygyrella, only known locality. 



Tf ||. — T. Mullani, as far as known. 



^[ +. — Ang. solitaria ? found elsewhere only east of longi- 

 tude 100°. 



% §. — Ang. Idahoensis is found somewhere between these 

 points. 



** |f. — Ang. Cooperi, discovered by Dr. Hayden in Black 

 Hills, and near lat. 40°, (Bridger's Pass); found by me at **, 

 and by Newberry in New Mexico, near ff. Between the line 

 of this and strigosa both will doubtless be found at many points 

 on the mountains. 



In Nebraska, east of the Black Hills, Dr. F. V. Hayden 

 found (See Geol. Report on Nebraska, 1858,) many of the 

 well-known eastern species, sub-fossil, in alluvium, along the 

 Missouri river, and some of them will probably be found to be 

 washed down from the Rocky Mountain ranges. H. arborea, 

 Ps. minuscula, Pat. striatella, O. chersina were among them, but 

 Ang. solitaria does not seem to occur above Ft. Berthold, about 

 lat. 47° 30', long. 100°, nor 31. concava above Council Bluffs, 

 lat. 41° 80', long. 96°, where most of the other eastern species 

 cease with the eastern trees.* 



* Daring the last summer Dr. Hayden found H. Cooperii and a new 

 species (H. Haydenii) in Webber cailon, near Salt Lake. 



