102 ASTACID.E. 



This State is one of the best explored, for I have seen in the Museum 

 of the Chicago Academy sixty glasses with Cambarus, mostly from the 

 different localities of Illinois, but 1 was not able to ascertain tbe species. 

 There are known from the northern border, as at Chicago and Evans- 

 ton, C. acutus var. A., and C. obesus ; from the middle northern parts 

 (Illinois River and affluents), Ogle County. Lawn Ridge, Basson Pudge, 

 Peoria. Athens, 0. acutus var. A., C. troglodytes, C. propinquus, C. immuiris, 

 C. obesus, and from the western border from the Mississippi, from Quincy 

 and Belleville, O. virilis, C. placidus, and C. immums. 



30. Missouri. — Five species: C. acutus, C. virilis, C. juvenilis, C. 

 BartonU, 0. obesus. All are from St. Louis and from the Osage River, 

 near the centre of the State. 



31. Arkansas. — One species: C. obesus, locality unknown. 



32. Texas. — Three species: C. OlarM, 0. virilis, ('. placidus; the 

 first occurs near the middle of the State, between San Antonio and El 

 Paso del Norte ; of the others the localities are unknown. 



33. Ixdiax Territory. — None. 



34. Kansas. — None. I have seen only one species in the Chicago 

 Museum. 



35. Nebraska. — One species: C. Nebrascensis, without locality. 



36. Dakota. — None. I have seen only one specimen in the Chi- 

 cago Museum. 



37. Wyoming. — None. 



38. Montana. — None. 



39. Idaho. — None. 



40. Colorado. — None. 



41. Utah. — None. 



42. Arizona. — None. 



43. New Mexico. — None. 

 4 4 . Nevada. — None . 



4 -I Washington Territory. — One species: A. leniusculus. at Puget 

 Sound. 



46. Oregon. — Three species : A. TrowbriAgU, A. leniusculus, A. K/a- 

 matkensis. From Astoria, from the Columbia River and Lake Klamath. 

 The locality of A Oreganus is doubtful. 



47. California. — Two species: A. Gambclii and A. nigrescens. From 

 San Francisco. 



British America. — Five species: C. virilis, C. propinquus, C. BartonU, 

 C. robustus, C. Klamathensis. 



In Canada from the Humber River near Toronto is noticed C. robus- 

 tus. In Lake Superior C. BartonU, C. propinquus, C. virilis occur, the 

 latter also in Lake Winnipeg, Saskatschavan, and the Red River. A. 

 Klamathensis is found in British Columbia. 



Mexico. — Two species: C. Wiegmanni, 0. Mexicanus. One from the 

 marshes of the valley of Mexico, the other without known locality. 



