NATURAL SCIENCES OP PHILADELPHIA. 303 



" In confinement, this species is just the opposite of the smaller lizards and 

 of the horned frogs. They retain to the last their fierceness and irascibility, 

 and their biting inclinations. My specimens were all perfectly untameable, 

 though petted for several days ; they all ultimately died, apparently of pure 

 rage and chagrin at being trapped. They bit fiercely at the finger, and 

 whipped good-sized dogs. They also bite indiscriminately a stick or anything 

 else presented to them ; and hold on so tenaciously that I have hung them 

 up for half an hour by their hold on a stick or string. They were ever on 

 the alert, watching every motion with cuuning and wrathful eyes. Every 

 now and then they would seem to lose their tempers completely, and tug 

 frantically at their ' lariettos,' leaping fiercely about in all directious. They 

 refused all food, and their lovely colors faded very perceptibly some time 

 before death." 



Crotophytus w i s 1 i z e n i i Baird, Girard, Proc. Acad. Nat. Sci. 1852, GO. C. 

 fasciatus Hallow., C. gumbelii B. G. 

 Colorado Chiquito River. 



Holbrookia propinqua Bd., Gird., Proc. Acad. Nat. Sci. 1852, 126. 



Navajo Springs ; Fort Wingate ; San Francisco Mountains ; Colorado Chi- 

 quito River ; Zuni City. " Very abundant ; not very agile." 



Holbrookia maculata Girard, Proc. Amer. Assoc. 1850, 201. 

 Fort Whipple. 



Holbrookia texana Troschel, Wiegm. Archiv. 1850, Tab. Bd., Gird., Proc. 

 Acad. Nat. Sci. Philada. 1852. 



Uta symmetrica Baird, Proc. Acad. 1 858. 



Bero Springs, near Fort Wingate. ''On rocks in a canon. Very agile, 

 and difficult to secure. Tails very fragile. 



" All have lemon or orange-yellow throats. Of some the bellies are plain 

 silvery while; of others bright greenish olive. Some are deep greyish-black 

 abore, others much lighter, with a dark lateral streak. The former I pro- 

 cured on light yellowish sandstone; the latter on dark blackish lava rocks. 

 Saw none except on rocks." (Coues' notes.) 



Sceloporus consobrinusB.de. G., Marcys' Report, 1853, 237. 



San Francisco Mountains ; Colorado Chiquito River ; Zuni Mountains. In 

 dry pine woods. 



Sceloporus graciosusB. &.G., Proc. A. N. S. Phil., 1852, 69. Sc. gracilis 

 B. k G., 1. c. 

 Colorado Chiquito River, in sandy situations ; Navajo Springs. 



Diploglossa. 



Heloderma h o r r i d u m Wiegmann, Herpet. Mexicana Tab. Baird U. S. Mex. 

 Bound. Surv. Tab. 

 Fort Whipple. Yellow orange, the black cross bars parallel and connected 

 margins of orange spots. 



Leptoglossa. 



Cnemidophorus sexlineatus Linn. var. gu 1 ar i s Bd. Grd. Cnem. gularia 

 B. G., 1. c. 1852, 128. On. gutUitus Hallow., 1. c. 1854, 192. 



Fort Wingate ; Colorado Chiquito River; Lithodendron Creek. 



" This is the lizard, par excellence, of Fort Whipple and vicinity. All sum- 

 mer it has been very numerous in and about the Fort coming into our tents 

 at all times, silently and furtively hunting for flies. Although so familiar, 

 it is exceeding timorous and darts out of sight at the least movement or noise. 

 It is, I think,by far the most agile of all its tribe. When running on level 

 ground the eye can hardly follow it ; but receives merely a dim impression of 



1866.] 



