116 BULLETIN 18 7, UNITED STATES NATIONAL MUSEUM 



Lateral stripe on adjacent portions of fourth and fifth rows; whole 

 middorsal area dark, a black edge along middle of seventh row; 

 middorsal stripe continuous, but indistinct taeniata 



10. Caudals few, 62 to 63 in known specimens; dorsolateral light stripes 



dotted posteriorly ; entire ends of ventral scales black f orbesi 



Caudals more numerous (known minimum 85) ; dorsolateral light stripes 

 continuous ; black spots at tips of ventrals smaller 11 



11. Lateral dark stripes more than one scale row wide, involving fourth 



and adjacent rows omiltemana 



Lateral dark stripe narrow, involving no more than parts of two 

 rows ; crassa 



12. Inner edge of dorsolateral light stripe on sixth row anteriorly ; sides 



below fourth row light, without dark stripes niontana 



Inner edge of dorsolateral light stripe on seventh row anteriorly, or, 

 sides dark or striped below fourth row 13 



13. Dorsolateral light stripes confined to fifth and sixth scale rows, inner 



edge (best defined anteriorly) on sixth 14 



Dorsolateral light stripes involving all of sixth and half of adjacent 

 scale rows, inner edge on seventh hesperia hesperia 



14. Sides of body below lateral stripe uniformly pigmented, with no evidence 



of light or dark longitudinal stripes hesperia baileyi 



A distinct dark line on second scale row, sometimes others on first and 

 third; a light line, well defined anteriorly, on adjacent borders of 

 second and third scale rows hesperia hesperioides 



15. Secondary dark lines on sixth and seventh or common borders of 



seventh and eighth scale rows montana 



No secondary lines as described gaigeae 



RHADINAEA AEMULA Bailey 



Rliadhmea aemula Bailey, Occ. Pap. Mus. Zool. Univ. Michigan, No. 412, 1940, 

 pp. 4-5, pi. 1, fig. 3. 



Type.— Mus. Comp. Zool. No. 42659. 



Type locality. — Omilteme and Sierra de Burro, Guerrero. 



Range. — Morelos, central Guerrero, and central Oaxaca. 



RHADINAEA CRASSA Smith 



Bhadinaea crassa Smith, Proc, Biol. Soc. Washington, vol. 55, 1942, pp. 190-191, 

 figs. 4, 5 ; Proc. U. S. Nat. Mus.. vol. 93, 1943, p. 463, pi. 32, fig. 1. 



Type.—E. H. Taylor-H. M. Smith Coll. No. 5526. 



Type locality — Durango, Hidalgo. 



Range. — Central Hidalgo to southeastern San Luis Potosi, known 

 from Durango, La Placita, and Barranca de los Horcones, Hidalgo; 

 and Ciudad Maiz, San Luis Potosi) . 



RHADINAEA DECORATA (Gunther) 



Coronella decorata Gijnther, Catalogue of the snakes in the British Museum, 



1858, pp. 35-36. 

 Bhadinaea decorata Cope, Proc. Acad. Nat. Sci. Philadelphia, vol. 15, 1863, p. 



101.— Dunn, Notulae Naturae, No. 108, 1942, p. 6.— Smith, Proc. U. S. Nat. 



Mus., vol. 93, 1943, pp. 463-464, pi. 32, fig. 3. 



