TEIID LIZAKUS OF THE GENUS CNEMIDOPHORUS 177 



fined to any one locality and may unite from either in front or 

 behind. The finding of specimens of tcssdlatus with a single fron- 

 toparietal plate seems to have a bearing on the origin of ce^'olhensis^ 

 the only form in the tcsseUatus group which regularly possesses but 

 one frontoparietal, as discussed under that species. Some of the 

 examples Avith one frontoparietal, complete or incomplete, are as 

 follows : C.A.S. Xos. 4247a, 42447, 42459, 34580, 3459G, 1574, 43223 ; 

 Stanford Nos. 102C, 570G; and IM.V.Z.U.C. No. 42G70. In C.A.S. 

 No. 48601 the right parietal is united with the interparietal and in 

 C.A.S. No. 42657 the frontoparietals are distinct, but each is united 

 posteriorly with the interparietal. In M.V.Z.U.C. the three 

 parietals are all fused into a single plate. 



Range. — This lizard is distributed over an unusually large terri- 

 tory. It inhabits the lower levels of western North America from 

 northwestern Oregon southeastward to the Panhandle of Texas, 

 thence south to southern Coahuila and west to the Pacific Ocean. 

 It is found throughout the central and northern districts of Lower 

 California and also on a number of islands in the Gulf of California. 



An unusually large number of records is available for fessellahis, 

 especially in the United States. The reports for this area are given 

 by states in alphabetical order, preceding a similar listing of the 

 Mexican specimens. 



ARIZONA.— Apache County {Ada/nana, U.S.N.M.) Cochise 

 County {Chincahua Mts., Van Denburgh, 1922, p. 532; Ruker Canyon 

 in the CMr'icahua Mts., Van Denburgh, 1922, p. 532, Stanford; 

 Fairhank., Van Denburgh and Slevin, 1913, p. 408, C.A.S. ; Iluachuca 

 Mts., Stejneger, 1902, p. 151, A.ISI.N.H., Stanford) . Coconino County 

 {Flagstaff, U.S.N.M. ; Grand Canyon, U.S.N.]\I. ; Lee's Ferry, Van 

 Denburgh, 1922, p. 512, U.S.N.M., B.Y.U.; Painted Desert, A.M. 

 N.H.; Tanner Tank, U.S.N.M,; Tuha, A.M.N.H., B.Y.U.). Gila 

 County {Glohe, F.M.N.H. ; Rice, U.S.N.M.; Roosevelt, Van Den- 

 burgh, 1922, p. 532. M.V.Z.U.C.) Graham County (Ash Creek, 

 U.S.N.M. ; Graham Mts., southwest of SolomonsviUe, U.S.N.M. ; 

 Safford, U.S.N.M.). Maricopa County {Agua Caliente, Van Den- 

 burgh and Slevin, 1913, p. 408, C.A.S. ; Cave Creek, Van Denburgh 

 and Slevin, 1913, p. 408, C.A.S.; Chandler, M.V.Z.U.C; Gila Bend, 

 U.S.N.M. ; Hassaxjamya, U.S.N.M. ; 12 miles west of 3Iaricopa, Burt, 

 :Mich. ; Paradise Valley, Van Denburgh, 1922, p. 532, C.A.S. ; Phoenix, 

 Van Denburgh, 1922, p. 512, U.S.N.M. ; '2o miles northeast of Phoenix, 

 Taylor; Sentinel, Stone, 1911, p. 231; Tempe, Van Denl)urgh, 1922, 

 p. 532, U.S.N.M., M.V.Z.U.C.', Stanford; Vulture, U.S.N.M.) Mo- 

 have County {Colorado River ahove Bill Williams River, ISI.V.Z.U.C; 

 Colorado River at the mouth of Diamond Creek, U.S.N.IM. ; 

 Fort Moham, Van Denburgh, 1922, p. 512, U.S.N.IM.; Hackherry, 



