496 PROCEEDINGS OF THE NATIONAL MUSEUM vol.93 



173, 181, respectively, as listed above; caudals 599, 58$, 644, 549, 

 respectively. In three females the dark bands are 14 or 15 on the 

 body, 5 or 6 on the tail; in the single male the body bands are 18, tail 

 bands 6. The dorsal scales in the light bands are usually black-tipped 

 (not in No. 109910). All the light bands are light yellow, and com- 

 plete about the body. 



The form differs from typical sartorii chiefly in (1) regularity of 

 the bands, and (2) light bands all yellow. In s. sartorii the bands are 

 complete or incomplete ventrally, and tend to be somewhat variable, 

 while in s. annul atus they are very even and regular. In the latter 

 they are broader than in most s. sartorii* and perhaps average less 

 numerous. In anmdatus all the light bands are yellow, while in 

 s. sartorii only the nuchal collar is yellow, the remaining bands red. 



I may add here a few notes on another species, Tropidodipsas 

 philippii, of which one specimen (M. C. Z. No. 11410) from "Colima" 

 has been examined. It is a male with 15-15-15 scale rows, 181 

 ventrals, single anal, 85 caudals, 8-8 supralabials (fifth and sixth 

 entering orbit on one side, fourth also on other), 9-9 infralabials, 

 2-2 preoculars and postoculars, and 1-2 temporals; the prefrontals 

 enter the orbit on both sides, above the preoculars; the loreal does 

 not enter the orbit; total length 519 mm., tail 142 mm. There are 

 feeble but distinct keels on the dorsal scales posteriorly and numerous 

 pits on the scales of the ventral surface of the head. On the body 

 there are about 11 long, dark cross bands narrowly separated from 

 each other hy light rings (several broken medially and alternating) 

 covering two or three scale lengths medially, four or five laterally; 

 on the tail there are nine similar black rings. The belly is mostly 

 light, the black rings involving the ends (one-third or one-fourth on 

 each side) of the ventrals. In caudal count this snake broadly over- 

 laps the count of occidentals, an obviously related species with 81 

 caudals; other philippii have 67 to 71. Nevertheless, occidentala. 

 appears to be well differentiated from philippti on the basis of ventral 

 color (all black except where light rings cross belly) and the total 

 absence of keels on the dorsal scales. 



TYPHI.OPS BASIMACULATUS Cope 



One specimen (No. 110304) is from Potrero Viejo, Veracruz, col- 

 lected by Dyfrig McH. Forbes. Dorsals 379; caudals 9; scale rows 

 18. I follow Taylor in restricting tenuis to Guatemala, pending 

 further collections from intermediate territories. 



The Museum has three others, from Cordoba and Orizaba, Veracruz 

 (Nos. 6344 [2], 6602). 



