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. 8. 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 was nearly dry. Our collections were made from a few deep holes 
about two miles below the city. These contained a large amount of aquatic 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 SANBORNI Faxon. 
New localities:— Onto: Black River, Elyria, Lorain Co.; Hudson, Summit 
Co.; Vermilion River; Cuyahoga River, Kent, Portage Co.; Dover Creek, Dover, 
Cuyahoga Co. West Vireinia: Horse Creek (U.S. N. M.). 
CAMBARUS OBSCURUS Hagen. 
New localities:— New York: Cattaraugus Creek. West Vrrcinta: 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 Ellerslie, Allegany Co., Md.? In the U.S. 
1A Contribution to the Ichthyology of Mexico. Field Columbian Museum, Publ. 65, Zoél. Ser., 
May, 1902, 3, p. 65. 
? Ortmann, Mem. Carnegie Mus., 1906, 2, p. 445. 
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