634 NORTH AMERICAN ASTACID^ FAXON 



the rostrum is even flatter than iu the typical form, tapering, and fur- 

 nished with minute ante-apical teeth. 



Astacus klamathensis Stiiups. 



Additional localities : Sprague and Williamson's Rivers, near Fort 

 Klamath, Oregon. Dr. J. 0. Merrill, U. S. Army (U. fc. N. M.). Eel 

 Biver, Humboldt County, California. Teste W. 1ST. Lockiugton.* A 

 small specimen, 37 mm long, collected by Dr. Merrill in Klamath Lake, 

 Oregon, is labeled " Color in life, bluish green." An adult collected 

 by the same gentleman is accompanied by the following note : " Color 

 when fresh, bright red, lighter beneath ; large claws darker. Common." 



Astacus nigrescens Stimps. 



" This species appears to be found in most of the larger brooks of 

 the central counties of California, such as the Alameda Creek, Alameda 

 County; Coyote Creek, Santa Clara County, and San Joaquin Slough." 

 Lockington, I. c. 



* Remarks upon the Thalassinidea and Astacidea of the Pacific coast of North 

 America, with description of a New Species. By W. N. Lockington. Ann. Mag. 

 Nat. Hist., 5th series, Vol. n, 1878, p. 303. 



Museum of Comparative Zoology, 



Cambridge, Massachilsetts, January 1. 1890. 



