266 3. IGVANIDM 



h'. — Blue belly patches confluent with throat 

 patch, and not separated from each other 

 by a lighter or darker midventral band; 

 ventral surfaces deep blue throughout. 

 S. o. taylori. — p. 315. 



dd\ — A definite black collar complete dorsally over 

 base of neck. 



eee. — Dorsal scales smaller, 38 to 46 between inter- 

 parietal plate and base of tail. 



S. jarrovii. — p. 321. 



eee'. — Dorsal scales larger, 27 to 37 between inter- 

 parietal and base of tail. 



S. t. poinsettii. — p. 326. 



b'. — Parietal and frontoparietal plates in contact with en- 

 larged supraoculars; scales on back of thigh not 

 smaller than those in front of anus. 



cc. — A strongly contrasted black blotch or collar in front 

 of shoulder; dorsal scales distinctly keeled, with 

 long points. 



ddd. — Scales larger, 25 to 32 between interparietal 

 and base of tail. 



eeee. — Scales of anterior ear denticulation longer, 

 acuminate, often extending completely across 

 ear-opening; coloration largely brown and 

 yellow above. 



ff. — Femoral pores 11 to 16, average 12.61; adult 

 males without narrow dark parallel lines on 

 lateral scales; no light middorsal longitud- 

 inal stripe one or two scales wide; often with 

 a broad dark brown dorsal band. 



S. magister. — p. 329. 



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