40 



respectively. Hatchlings achieve reproductive maturity the season fol- 

 lowing birth. Less than 10% of the population consisted of the larger 

 size classes in late May, strongly suggesting annual turnover of the 

 population. Only 12 of the 135 lizards marked during the first year 

 were recaptured the second year and, although some migration and shift- 

 ing of home ranges occurred, this should have little effect on age-size 

 class proportions of the population. 



104. Hunsaker, D., II and C. Johnson. 1959. Internal pigmentation and 

 ultraviolet transmission of the integument in amphibians and reptiles. 

 COPEIA 1959(4): 311-315. 



The following species of Cnemidophorus lack internal pigment: 

 grahami (= tesselatus ), perplexus (= neomexicanus or inornatus ), sacki 

 (= gularis or exsanguis ), sexlineatus and tessellatus (= tigris T. The 

 significance of this fact in light of their ecological aspects is brief- 

 ly discussed. 



105. 3ameson, D. L. and A. G. Flury. 1949. The reptiles and amphib- 

 ians of the Sierra Vieja range of southwestern Texas. TEXAS JOURNAL 

 OF SCIENCE 1(2): 54-79. 



Life belts and vegetation associations of the region are describ- 

 ed. Cnemidophorus perplexus (= inornatus ) reaches its highest abundance 

 on sandy alluvial fans with scattered areas of small rock in the cat- 

 claw-tobosa association. It also occurs in nearby sandy areas of the 

 Plains life belt. Cnemidophorus grahamii (= tesselatus ) reaches its 

 peak abundance in the creosotebush-catclaw-blackbrush association adja- 

 cent to the mountains. This area is quite rocky with little grass but 

 many desert shrubs under which rodent burrows are common. This species 

 also occurs at rocky mouths of canyons, on rocky canyon bottoms and 

 their associated slopes, and in sandy areas (salt cedar-mesquite and 

 creosotebush associations) of the Rio Grande Basin to the west. Cnemi- 

 dophorus gularis octolinearis (= exsanguis and gularis ) occurred in 

 rocky areas of the mountains and plains in several vegetation associa- 

 tions (the authors were unknowingly dealing with both species here). 

 Cnemidophorus tigris was not found in the study area but occurred in the 

 Rio Grande Basin almost exclusively in the catclaw-creosotebush associa- 

 tion. 



106. Jones, K. B. 1981. Effects of grazing on lizard abundance and 

 diversity in western Arizona. SOUTHWESTERN NATURALIST 26: 107-115. 



Comparisons were made between heavily and lightly-grazed chapar- 

 ral, desert grassland, mixed riparian scrub, cottonwood-willow and Son- 

 oran desertscrub habitats. The abundance and diversity of lizard spe- 



