MEXICAN SNAKES AND CROCODILMNS — SMITH 



447 



The Museum has four other specimens from Mexico : No. 1988, Ala- 

 mo de Parras, Coahuila ; Nos. 14279, 14283, Chihuahua ; and No. 46355, 

 Guanacevi, Durango. 



* MASTICOPHIS FLAGELLUM PICEUS (Cope) 



A single specimen in the Museum, from Mexico, is labeled Altata, 

 Sinaloa (No. 33570). 



MASTICOPHIS FLAGELLUM STRIOLATUS (Mertens) 



Masticophis flagellum striolatus Smith, Journ. Washington Acad. Sci., vol. 31, 

 1041, pp. 393-394. 



Two specimens were secured, one 10 km. south of Cuernavaca, 

 Morelos (No. 111277), the other at Coyuca, near Acapulco, Guerrero 

 (No. 111278). 



The Museum has 18 other specimens, as follows : Acaponeta, Nayarit 

 (No. 46183) ; Atemajac, Jalisco (No. 4G386) ; Colima (Nos. 32178, 

 32221-2, 32232-4, 62027-9, 62031-4) ; Zacatula River, near Lauria, 

 Guerrero (No. 32344) ; Sierra Madre, Chacan River, Michoacan (No. 

 62026) ; Hurcha Volcano, plains of Nuruapa, Michoacan (No. 62030). 



All specimens have 17-13 scale rows, 2-2 preoculars and postoculars ; 

 the supralabials are 8-8 except in two (Nos. 32344, 62030), which have 

 9-9; and the temporals are 2-2 except in eight, which have three 

 posterior temporals. Other data on variation are given in table 22. 



Table 22.- — Variation in Masticophis flagellum striolatus 



U.S.N.M. 

 . No. 



62031 

 62033 

 32221 

 46483 

 62028 

 62030 

 62032 

 62034 

 111277 

 111278 



Sex 



Ven- 

 Irals 



185 

 189 

 183 

 183 

 189 

 189 

 183 

 193 

 189 

 184 



Caudals 



101 + 

 10S4-? 



1184- 

 125 

 118 

 123 

 994- 

 1204- 

 117 



Infrala- 

 bials 



10-10 

 10-11 



10-11 

 10-11 

 10-10 

 10-10 

 10-11 



10-10 



Fifteen other counts on mainland specimens of this race are avail- 

 able in the literature (Boulenger, 1893, pp. 388-389 ; Oliver, 1937, p. 19 ; 

 Taylor, 1938, pp. 524-525; Van Denburgh, 1897, p. 463). All counts 

 available (35) show a total range of from 183 to 195 ventrals, sexed 



