52 



138. — . and G. A. Hoddenbach. 1966. Geographic variation in ovarian 

 cycles and clutch size in Cnemidophorus tigris (Teiidae). SCIENCE 

 154(3757): 1671-1672. 



The activity seasons for _C. t. septentrionalis in Colorado and _C. 

 t. marmoratus in Texas were determined. Older lizards in both areas lay 

 larger clutches. Colorado lizards lay one clutch per year averaging 3A 

 eggs; Texas lizards average 2 clutches per year each averaging 2.2 eggs. 



139. McKenna, T. M. and G. C. Packard. 1975. Rates of heat exchange 

 in the lizards Cnemidophorus sexlineatus and Sceloporus undulatus . 

 COPEIA 1975(1): 162-169. 



Lizards from Colorado were heated and subsequently cooled through 

 a range of 21-39°C. They heated up faster than they cooled off. This 

 differential was not due to endogenous heat production at any tempera- 

 ture and is attributed to changes in thermal conductivity mediated by 

 the cardiovascular system. This indicates a capacity for these small 

 lizards (average Vv'eight 6 gm) to control their rates of heat exchange 

 with the environment. 



140. McKinney, C. O., F. R. Kay and R. A. Anderson. 1973. A new all- 

 femalespeciesof the genus Cnemidophorus . HERPETOLOGICA 29: 361-366. 



Cnemidophorus laredoensis from Webb County, Texas, is named, des- 

 cribed, and compared morphologically and biochemically. It is diploid 

 and its parental species are most likely _C. gularis and _C. sexlineatus . 



141. Maslin, T. P. 1950. Herpetological notes and records from Colo- 

 rado. HERPETOLOGICA 6(3): 89-95. 



Distributional notes are given for Cnemidophorus tesselatus and _C. 

 perplexus (= probably velox ), as well as morphological descriptions of 

 young and adults of both species. The placement of Cnemidophorus gra - 

 hamil Baird and Girard in the synonymy of C. tesselatus (Say) is con- 

 firmed. Cnemidophorus gularis octolineatus is placed in the synonymy of 

 _C. perplexus . 



142. — . 1962. All-female species of the lizard genus Cnemidophorus 

 (Teiidae). SCIENCE 135(3499): 212-213. 



