102 ASTACID^. 



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

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

 different localities of Illinois, but I was not able to ascertain the species. 

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

 ton, C. acufiis var. A., and C. obesiis ; from the middle northern parts 

 (Illinois Kiver and affluents), Ogle County, Lawn Eidge, Basson Pudge, 

 Peoria, Athens, C. acutus var. A., C. iroghdi/tes, C. propinquus, C. wimnnis, 

 C. ohcsuf!, and from the western border from the Mississij:)pi, from Quincy 

 and Belleville, C. virilis, C. placidus, and C. immunis. 



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

 Bartonii, C. obesiis. All are from St. Louis and from the Osage River, 

 near the centre of the State. 



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



32. Texas. — Three species: C. Clarldi, C. virilis, C. jjlacidus ; the 

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

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



33. Indian 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. 



4 1 . Utau . — None . 



42. Arizona. — None. 



43. New Mexico. — None. 



44. Nevada. — None. 



45. Washington Territory. — One species: A. leniuscidus, at Puget 

 Sound. 



46. Oregon. — Three species : A. Trowbridgii, A. leniuscidus, A. Kla- 

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

 The locality of A. Oreyanus is doubtful. 



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

 San Francisco. 



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

 C. robustus, C. Klamathensis. 



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

 tus. In Lake Sujierior C. Baiionii, 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. Wicgmanni, C. Mexicanus. One from the 

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



