HERPETOLOGY OF ZUNI MOUNTAINS — GEHLBACH 



261 



Francisco Mountain, Coconino County, Arizona, the type locality of 

 A. t. nebulosum (see Hallowell, 1854, p. 144). 



Evidence from other Colorado Plateau locaHties coupled with the 

 Zuni data suggests that A. t. utahense is an ontogenetic variant of 

 A t nebulosum. Lowe's statement (1955d, p. 238) that adult color 



90 



80 



^70 

 E 

 X 

 5 60 



< 50 



40 



30 



30 



A-4V* 



A e 



40 





o •© 



o° o 



o 

 o o o 



50 60 70 80 90 



SNOUT-VENT LENGTH mm. 



100 



Figure 5.-Relationship of tail length to snout-vent length in Ambystoma tigrinum nebu- 

 losum from the Zuni region. 



# Males, metamorphosed 



y Females, metamorphosed |Yellow-spotted 



O Larvae J 



■ Males, metamorphosed] Non-yellow-spotted 



A Metamorphosed jg^p^^.^^^^^jly ^ai^t^ined (collected July 16, 1957, 7800 feet) 



A Larvae J 



pattern is established upon transformation, unfortunately, is mis- 

 leading. Dunn (1940, p. 154) and Bishop (1941, p. 163) have sum- 

 marized ontogenetic changes in color pattern with which I concur. 

 In fact, Dunn (1940, p. 158) diagnosed A. t. nebulosum {=A. t 

 utahense, Lowe, 1955d) as containing yeUow-spotted young and 



