42 BULLETIN 199, UNITED STATES NATIONAL MUSEUM 



KEY TO MEXICAN FORMS OF COLEONYX 22 



1. Dorsal surface covered with small granular scales, without larger tubercular 



scales 2 



Dorsal surface with larger tubercles intermingled with the small granular 

 scales 9 



2. Two light and 3 dark bands between level of arm and leg insertions. 



fasciatus (p. 43) 



Usually 4 or parts of 4 dark bands between levels of arm and leg insertions, or 



the bands broken up into spots 3 



3. Preanal pores small, usually 4 in number (rarely more or less), the pore-bearing 



scales separated medially; maximum snout-vent measurement about 59 



mm brevis (p. 43) 



Preanal pores larger, usually 6 to 10, the series continuous, not separated 

 medially; maximum snout- vent measurement 77 mm 4 



4. Usually 4 or less postmental scales touching mental .variegatus slevini (p. 45) 

 Usually 5 or more postmental scales touching mental 5 



6. Preanal pores in males usually 8 or more variegatus bogerti (p. 44) 



Preanal pores in males usually 7 or less 6 



6. Dark transverse body bars in the adults considerably wider than the light 



interspaces 7 



Dark transverse body bars in adults about equal to or narrower than the 

 light interspaces ; or bars obsolete and replaced by spotting 8 



7. A middorsal light longitudinal line usually splitting the dorsal body bars in 



the adults variegatus sonoriensis (p. 45) 



No middorsal light longitudinal line; adults with longitudinal edges of the 

 dark body bars even, with narrow uniform interspaces. 



variegatus peninsularis (p. 44) 



8. Dark body bands in the adults unicolor; top of head unicolor; nuchal light loop 



narrow and clear variegatus abbotti (p. 44) 



Dark body bands in the adults with light centers producing a double-barred 

 effect, or bars obsolete and replaced by spotting; top of head spotted; nuchal 

 light loop irregular or obsolete variegatus variegatus (p. 44) 



9. Enlarged supranasals ^^ separated by a median circular scale. 



elegans nemoralis (p. 43) 

 Enlarged supranasals in contact elegans elegans (p. 42) 



COLEONYX ELEGANS ELEGANS Gray 



Coleonyx elegans Gray, Ann. Mag. Nat. Hist., vol. 16, 1845, p. 162. 



Coleonyx elegans elegans, Klatjber, Trans. San Diego Soc. Nat. Hist., vol. 10, 



1945, pp. 191-195, map. 

 G[ymnodactylus\ scapularis A. Dum:6ril, in Dum^ril and Dum^ril, Catalogue 



na^thodique de la collection des reptiles, 1851, pp. 45-46 (Pet6n, Guatemala, 



here restricted to La Libertad; Mus. Hist. Nat. Paris). 

 Gyinnodactylus coleonyx A. Dumeril, Arch. Mus. Hist. Nat. Paris, vol. 8, 1858, 



p. 483 (same type as scapularis). 



Type. — Brit. Mus. Nat. Hist., male spec; Mr. Dysou collector. 



" Adapted from Klauber, op. cit., pp. 205-206. 



*> We believe the scale above nostril should be designated supranasal rather than prenasal; and those scales 

 following the mental should be postmental rather than gular, since the latter term refers to throat or gullet, 

 rather than chin. 



