CROCODILIANS, LIZAKDS, AND SNAKES. 

 Dipsosaxirus dorsalis Hallowell. 



245 



Catalogue 

 No. 



2730 



9374 



9373 

 2702 



9295 

 8635 



12634 

 12653 

 5294 



4178 

 15888-91 



15966-68 

 19103 



21839 

 21854-5 



21950-1 



Number 

 of speci- 

 mens. 



Locality. 



Fort Yuma, California-. . 



Colorado and Zuiii Ex- 

 pedition. 



Colorado River 



Pacific K. R. Survey 



Sonora 



Colorado Desert, Arizona 



La Paz, Lower California 

 do 



Cape St. Lucas, Lower 



Cailfornia. 

 Colorado 



San Lnis. Gozales Bay, 

 Gulf of California. 



Yuma, Arizona 



Colorado Desert, south 

 of Salton Lake, Cali- 

 fornia. 



Quito vaquito, M e x . 

 Bound. Line, Arizona. 



Fort Yuma, California.. 



Yuma Desert; mon. 200, 

 Arizona. 



Coyote Wells, Colorado 

 Desert, San Diego 

 County, California. 



Gardners Laguna, Sal- 

 ton River, Lower Cali- 

 fornia. 



When col- 

 lected. 



-,1855. 



From whom received. 



Maj. G. H. 

 U. S. A. 



Thomas, 



-,1875.. 



, 1882. 

 ,1882. 



H. MoUhansen 



Lieut. R. S. William- 

 son, U. S. A. 



Lieut. E. 



U. S. A. 



L.Belding. 



do 



J. Xantus . 



Bergland, 



A. Schott 



TJ. S. Fish Commission 



do 



F. Stephens 



Dr. E. A. Mearns 



-do. 

 -do. 



Nature of speci- 

 men. 



Alcoholic. 



do. 

 do. 



do. 

 do. 



do. 

 do. 

 do. 



do. 

 do. 



do. 

 do. 



.do. 



do. 



do. 

 do. 



do. 



U.S. 



N.M. 



No. 



18345 



18346 

 18347 

 18348 

 18349 

 18350 

 18351 

 18352 

 18353 

 18:!54 

 18355 

 18350 

 18357 

 18358 

 18359 

 18360 



Sex and 



Locality. 



Male 



adult. [ 

 Young; 



juv. 

 Adult 



juv. 



juv. 

 Adult 

 Adult 

 Adult 

 Adult 

 Adult 

 Adult 

 Adult 

 Adult 



juv. 

 Adult 



Callville, Great Bend of Colorado, Nevada 



.do. 

 -do. 



Amargosa Desert, Nevada 



Amargosa River, California 



do 



Three miles east of Owens Lake, California 



Panamint Valley, California 



do 



Mohave Desert, Leach Point Valley, California . 



Borax Flat Water Station, California 



Mesquite Valley, California 



Bennett Wells, California 



do 



Furnace Creek, Death Valley, California 



Owl Holes, Death Valley, California 



Alti- 

 tude. 



Feet. 



4,100 

 3,300 



Date. 



Collector. 



Maj" 4 Merriam. 



....do ... 

 ...do ... 

 May 31 

 Apr. 27 



do ... 



June 26 

 May 15 

 Apr. 24 

 Apr. 25 

 Apr. 22 

 Apr. 13 

 Apr. 1 

 Apr. 4 

 June 21 

 Apr. 26 



Bailey. 



do. 

 Merriam. 

 Bailey. 

 Merriam . 

 Bailey. 

 Nelson. 

 Bailey. 

 Merriam. 

 Stephens. 

 Bailey, 

 do. 

 do. 

 Fisher. 

 Merriam. 



CROTAPHYTUS Holbrook. 



Crotaphytiis Holbrook, North Amer. Herpt., II, 1842, p. 79. — Baikd and Gikakd, 

 in Stansb. Expl. Gr. Salt Lake, 1852, p. 339.— Bocourt, Mi8.s. Sc. Mex. Eept., 

 1874, p. 153.— BouLKNGER, Cat. Liz. Brit. Mus., 2(1 ed., II, 1885, p. 203. 



Leiosaurus A. Dumeril, part. Arch. Mus., VIII, 1856, p. 532. 



Throat and sides of neck wrinkled; a gular fold; femoral pores. 

 Scales above small, tuberciilate, and paved ; beneath larger, imbricated, 

 and hexagonal. Tail much larger than body, rounded. Head covered 

 with scales above. Occipitals small; suborbitals of small plates. Ear 

 distinct. Xostril rather lateral, anterior to the end of canthus rostralis. 



