LYMN^EID^E OF NORTH AMERICA. 



219 



the cubcnsis group. As in the case of techclla, future investigation will 

 doubtless add much information concerning the range of this race. 

 At present it is known to occupy the drainage areas of three great 

 river systems — the Mississippi, the Rio Grande and the Colorado. 



RECORDS. 



UNITED STATES. 



Arizona: Holbrook, Navajo Co. (Ashmun) ; Midway between the Chiri- 

 cahua and Peloncillo ranges (Pilsbry). 



California: Bardsdale, Ventura Co. (Berry); in lake, 25 miles west of 

 Susanville, Lassen Co. (Hannibal) ; near Daggett, Mojave River, San Ber- 



as§. Distribution 

 of 

 COCKERELLI 



Fig. 18. 



nardino Co. (Smith. Coll.) ; San Diego, San Diego Co. (Newberry) ; Bixby, Los 

 Angeles Co. (Hemphill; Walker). 



Colorado: Fossil Ridge, six miles south of Ft. Collins, Larimer Co. (Hen- 

 derson) ; Florence, Fremont Co. (Henderson; A. Kenyon) ; Lake, San Luis 

 Valley, Costilla Co. (Ingersoll) ; pool, southeast of Denver, Arapahoe Co. (J. D. 

 Putnam). 



Montana: Missouri River above the Falls (Bland & Cooper); Mingus- 

 ville, Dawson Co.; spring, five miles south of Wilbaux, Dawson Co. (Squyer). 



Nebraska: Ogallala, Keith Co. (Ferriss; Simpson). 



Nevada: Quinn River crossing, Humboldt Co., alt. 4100 ft. (Berry; C. H. 

 Richardson, Jr.). 



New Mexico: Gallup, Bernalillo Co. (Ashmun); Chaco Canyon, alt. G;100 

 feet, San Juan Co. (Geo. H. Clapp; Geo. H. Pepper) ; Farmington, San Juan Co. 



