264 3. IGUANIDM 



e*. Larger ; adult males with lateral blue or black- 

 ish belly-patches united across mid-line or sep- 

 arated merely by a narrow whitish interval 5 

 blue or black of belly confluent with that of 

 throat 5 undersurface of thighs and base of tail 

 often blue. 



S. g. vandenburgianus. p. 286. 



c*. Size larger, adults usually more than 60 mm. from 

 snout to anus; scales on back of thigh acuminate and 

 keeled 5 throat often with two discrete blue spots; 

 sides of body never reddish orange; 33 to 55 dorsal 

 scales in a row from interparietal plate to backs of 

 thighs. 



dd. No definite large black collar in front of shoul- 

 der. 



ee. Dorsal scales smaller, 43 to 53 (average 47.3) 

 between interparietal and backs of thighs; no 

 dorsolateral longitudinal light stripe; often 

 with two blue spots on throat. 



S. elongatus. p. 295. 



ee 2 . Dorsal scales larger 35 to 48 (average 39 to 

 42) between interparietal and backs of thighs; 

 often with a dorsolateral light stripe. 



f. Smaller; usually with very well-defined dor- 

 solateral and lateral light stripes; males with 

 a blue patch on each side of throat. 



S. consobrinus. p. 290. 



f". Larger; dorsolateral light stripe, if present, 

 without well-defined nearly straight edges. 



