12 BAYLOR UNIVERSITY BUE/LETIN 



of those species obtained by members of the United States Biological Survey 

 on their trip through Brewster County. (See Bailey, North American Fauna 

 No. 25; "Biological Survey of Texas.") 



REPTILIA. 



Crotaphytus collaris baileyi Stejn. Bailey's Ring-necked Lizard. 



This fine lizard was common on the "Big HSU" near Alpine, at Blackburn's 

 Ranch (six miles from Paisano) and near Elephant Mesa. In five females 

 obtained on the "Big Hill," the nuptial coloration was in the form of trans- 

 verse bands of pink, about four across the body and several on the tail. Dates, 

 May 7th and 8th. All of my examples exhibit a double row of interorbitals, 

 so I consider them typical of this much discussed subspecies. 



The Biological Survey examples are from the west base of the Chisos Moun- 

 tains and Paisano. 



Crotaphytus wislizenii Baird and Girard. Leopard Lizard. 



"A fine large individual of this big spotted lizard was shot near Boquillas 

 in the Big Bend of the Rio Grande, by McClure Surber * * * The species is 

 not common and occurs only in the low hot valleys of extreme arid Lower 

 Sonoran Zone." (Bailey). 



The Big Bend doubtless marks the eastern limit to the range of this fine 

 species. I saw a large lizard which I supposed to be wislizenii in the hot 

 desert strip between Butcherknife and Terlingua, but I was too much crippled 

 to pursue it and the boys were off on a quail hunt and out of call. The breed- 

 ing colors, in examples from near El Paso, sent me while fresh by Messrs. 

 Townsend and Barber, were gorgeous. The under parts were bright crimson 

 and the upper parts were spotted with the same color. 



Holbrookia texana Troschel. Texan Spotted Lizard. 



Inhabits the low, hot desert strips. It was not observed near Alpine but 

 was extremely abundant from Butcherknife to the base of the Chisos Moun- 

 tains. The examples collected were so brilliantly colored that I could hardly 

 realize that they were of the same species that occurs in Central Texas. Re- 

 corded by Bailey from Boquillas and McKinney Spring. 



Holbrookia maculata Girard. Spotted Lizard. 



Specimens of this species were obtained at Alpine, Paisano, Du Bois Canyon 

 and Blackburn's Ranch. The Biological Survey specimens are from about 

 the same localities. 



TTie females collected by us are very variable in markings but the upperparts 

 are uniformly of a light clay color. An interesting series of these lizards was 

 received at the Museum from Hockley, Yoakum and Garza Counties in the 

 Plains Region. These are in the breeding colors and are very handsome speci- 

 mens, although they have now been immersed in formalin for several months. 

 The males are similar to those from Brewster County but the females are very 



