164 NORTH AMERICAN FAUNA. [No. 7. 



1866. Coleongx variegatus Cope, Proc. Phila. Acad., I860, p. 310. Id., ibid., 1867 (p. 



85) (Owens Valley, Calif.). 

 1885. Eublepliaris fasciatus Boulcnger, Cat. Liz. Br. Mus. ; I, p. 231 (Ventahas, Mexico). 

 Coleouyx brevis. 

 1859. Stenodactylus variegatus Baird, Mex. Bound. Surv. Ropt. u, pp. 12-34 (part) pi. 



xxiv, figs. 11-19 (Jun. from Live Oak Creek, Texas). 

 1880. Coleonyx variegatus Cope, Bull. U. S. Nat. Mus., No. 17, p. 13 (Texas) (nee Baird). 

 1885. Eublepliaris variegatus Bouleuger, Cat. Liz. Br. Mus. I, p. 233 (Texas) (nee 



Baird). 



The only specimen brought home by the expedition is a young one 

 (No. 18620) collected by Mr. Bailey, January 23, on the east side of 

 Death Valley, opposite Bennett Wells, about 50 feet above the salt fiat. 

 This is within the known range of this species, which extends east to 

 Tucson, Ariz., north to Owens Valley, California, and west across the 

 Colorado and Mohave Deserts to Mohave Station. 



Family IauANiDJE. 



Dipsosaurus dorsalis (B. & C). 



The sixteen specimens brought home by the expedition extend our 

 knowledge of the geographical distribution of this species materially. 

 We knew in a general way that it inhabits southern California and Lower 

 California, but very few records of exact localities have ever been given. 

 We now find that it occurs in the whole Death Valley region, extend- 

 ing north into Owens Valley, as high as 4,100 feet above the sea, and 

 east to Callville, on the Great Bend of the Colorado, Nevada, making 

 with the specimen from the Amargosa Desert, Nevada, the first record 

 of the species in that State, so far as I know. 



This species then ranges from Cape St. Lucas along the gulf coast of 

 Lower California to the Colorado and Mohave deserts. To the east it 

 extends at least as far as the Colorado Biver, but how far beyond is 

 not known. Its northern range is indicated above.* 



It is interesting to note that this species is a vegetable eater, as Dr. 

 Merriam's subjoined notes show. 



[This remarkable lizard, which in general form suggests the ancient 

 Saurians, is more strictly limited to the torrid Lower Sonoran Zone 

 than any other species, not excepting the gridiron-tail (Gallisaurus 

 ventralis). It ranges across the Lower Sonoran deserts of the Great 

 Basin from the Mohave Desert and Death Valley to the Great Bend 

 of the Colorado Biver, and thence northerly in eastern Nevada through 

 the lower part of the valleys of the Virgin and Muddy, always keeping 



* There is a record which would seein to indicate the occurrence of Dipsosaurus 

 dorsalis on the west slope of the Sierra Nevada in California, inasmuch as the 

 smaller specimen brought home by Dr. Heermann is said to have been collected be- 

 tween " Kern River and the Tejon Pass" (Pac. R. R. Rep., x, 1853, Williamson's route, 

 p. 8), but it must not be forgotten that Lieut. Williamson's parties on that expedition 

 were repeatedly on the slope toward the desert, and there is not the slightest prob- 

 ability that the specimen in question was collected on the valley slope. 



