374 CRAYFISHES. 



that one might well suspect some error if the origin of the specimens were not 

 so well attested. Seven specimens, males of the first form, now in the Field 

 Museum of Natural History, were collected by Mr. S. E. Meek, together with 

 four female C. virilis, June 9, 1901, in the drainage of the Rio de los Conchos, 

 one of the southern tributaries of the Rio Grande. They were picked out from 

 among the fishes which were the chief object of Mr. Meek's exploration of 

 Mexico and sent to me for determination in January, 1902. 



The conditions obtaining at the time and place of their capture are thus 

 described by Mr. Meek in his account of the fishes secured during his Mexican 

 explorations of 1901 :^ 



"At Jimenez the Rio Conchos w-as nearly dry. "ur collections were made from a few deep holes 

 about two miles below the city. These contained a large amount of acjiiatic vegetation, which made 

 collecting difficult and unsatisfactory. The water was very clear, and in the deeper places were seen 

 many large suckers which we were unable to capture. Sunfishes were very abundant. All of these 

 streams become large and deep in the rainy season, at which time the Rio Conchos at Jiminez becomes 

 two hundred or more feet, in width and as much as fifteen feet in depth." 



Cambarus propinquus sanbornii Faxon. 



New localUies: — Ohio: Black River, Elyria, Lorain Co.; Hudson, Summit 

 Co.; Vermilion River ; Cuyahoga River, Kent, Portage Co. ; Dover Creek, Dover, 

 Cuyahoga Co. West Virginia: Horse Creek (U. S. N. M.). 



Cambarus obscurus Hagen. 



New localities: — New^ York: Cattaraugus Creek. West Virginia : Cassity, 

 Randolph Co.; Cheat River, Ises Ferry, Sand Run, Childer's Run, and 

 Trubie's Run, near Buckhannon, Upshur Co.; Queens, Upshur Co.; Weston, 

 Lewis Co.; Hacker's Creek, near Janelew, Lewis Co.; Ten-Mile Creek at 

 Lumberport, Harrison Co.; Decker's Creek above Morgantown, Monongalia 

 Co. (U. S. N. M.). 



Cambarus obscurus is an abundant river species in the Upper Ohio River 

 Basin in northern West Virginia, and western Pennyslvania. It is also found 

 in the Lake Erie and Lake Ontario drainage in the states of Pennsylvania and 

 western New York, and in Wills Creek, an affluent of the Potomac River, at 

 Hyndman, Bedford Co., Pa., and EUerslie, Allegany Co., Md.- In the U. S. 



'A Contribution to the Ichthyology of Mexico. Field Columbian Museum, Publ. C5, Zo(>l. Ser., 

 May, 1902, 3, p. 65. 



2 Ortmaun, Mem. Carnegie Mus., 1906, 2, p. 445. 



