80 



The Paloduro region consists of a series of canyons and draws, 

 with scattered cottonwoods and willows in their bottoms. Other vege- 

 tation includes scrub oaks, Opuntia , bear grass and various shrubs. 

 Elevations range between 2800 and 3600 feet. Cnemidophorus gularis is 

 abundant in some areas, but not where _C. grahamii (= tesselatus ) oc- 

 curs. The former species prefers sandy level areas and the latter 

 rocky bluffs. C. grahamii (= tesselatus ) does not attempt to escape 

 into or even use burrows, but seeks shelter under rocks (perhaps be- 

 cause they are abundant). The species was particularily common in Rush 

 Creek Arroyo around large sandstone rocks on bluffs surrounding a ser- 

 ies of small springs. One individual was found depositing eggs in 

 loose sand near the base of a shelving bank. Morphological descrip- 

 tions of adults and young are given. 



215. Tanner, D. L. 1975. Lizards of the New Mexican Llano Estacado 

 and its adjacent river valleys. STUDIES IN NATURAL SCIENCES, EAST- 

 ERN NEW MEXICO UNIVERSITY 2(2): 1-39. 



A list of museum specimens is given and localities individually 

 plotted on range maps. Species of Cnemidophorus included are exsan - 

 guis , gularis, inornatus , sexlineatus , tesselatus and tigris . 



216. Tanner, W. W. and 3. E. Krogh. 197^;. Variations in activity as 

 seen in ^f sympatric lizard species of southern Nevada, USA. HERPETO- 

 LOGICA 30(3): 303-308. 



The abundance of Cnemidophorus tigris on a daily and seasonal 

 basis was determined in a lizard community of 4 species on the Nevada 

 Test Site. Individuals of _C. tigris were found to escape capture best 

 at the time of day when the species was most abundant; the significance 

 of this is discussed. 



217. Taylor, E. H. 1938. Notes on the herpetological fauna of the 

 Mexican state of Sonora. KANSAS UNIV SCIENCE BULLETIN 24: 475-503. 



Cnemidophorus burti is formally named, described and diagnosed. 

 The type locality is "near La Posa, 10 mi. NW Guaymas". A photograph 

 of the type, which is lined with no spots, is provided. 



218. — . 1940. Palatal sesamoid bones and palatal teeth in Cnemido - 

 phorus, with notes on these teeth in other saurian genera. PROCEEDINGS 

 OF THE BIOLOGICAL SOCIETY OF WASHINGTON 53: 119-124. 



Palatal sesamoid bones and teeth are present in several species 



