484 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 93 



head scales. Whether this specimen actually was collected near Te- 

 qucyutepec is not certain. It does not seem probable that the form 

 occurs both at Potrero and at Tequeyutepec, although this is not 

 impossible ; also it does not seem probable that p. phenax would occur 

 with p. halophUus at Tequeyutepec, although this also is not impos- 

 sible; if the latter is true, then some doubt is thrown upon the asso- 

 ciation of the two forms as subspecies. Data available at present 

 are much too inadequate for the formation of definite conclusions. 



THAMNOPHIS RUFIPUNCTATUS (Cope) 



Thamnophis ruflpunctatus S.mitii, Zoologica, vol. 27, pp. 120-121, 1942. 



Four specimens were secured near Progreso, Chihuahua (Nos. 

 104658-61). 



The Museum has 15 other specimens, from Mexico, as follows : Guan- 

 acevi, Durango (No. 46369) ; Meadow Valley, Chihuahua (No. 26592) ; 

 Eio Casas Grandes (No. 2G 91) ; Arroyo del xViamos, 70-74 km. south of 

 Nueva Casas Grandes, Chihuahua (Nos. 42874-5) ; Chihuahua (Nos. 

 14254, 14261 (2), 14265, 14271, 14275, 14286, 14288) ; Rio Papagochic, 

 Guerrero, Chihuahua (No. 95607) ; Guadelupe y Calvo (No. 46368). 



THAMNOPHIS RUTHVENI Hartweg and Oliver 



Thamnophis ruthveni Smith, Zoologica, vol. 27. p. 114, 1942. 



A single topotype, from near Tehuantepec, Oaxaca (No. 110802), 

 was collected. 



The Museum has one other, from Chivela, Oaxaca (No. 46364). 



THAMNOPHIS SAURITUS CKALCEUS (Cope) 



One specimen (No. 110805) was secured at Jonuta, Tabasco. It is a 

 male with 150 ventrals and 92 caudals. 



The Museum has three others from Mexico, from Montecristo, Ta- 

 basco (No. 46548) ; Puerto Morelos, Yucatan (No. 46530), and Cozumel 

 Island (No. 13906, type of rutiloris) . 94 



THAMNOPHIS SAURITUS PROXIMUS (Say) 



Thamnophis sauritus proximus Smiih, Zoologica, vol. 27, p. 116, 1942. 



Three specimens were secured, one (No. 105305) at Hacienda La 

 Clementina, near Forlon, Tamaulipas, and two (Nos. 110803-4) near 

 Acultzingo, Veracruz. The ventrals of these, in the above order, are 

 160, 159, 160; caudals 102+ ( $ ), 97 ( $ ), 98 ( 9 ). 



M Cope, 18f-5b, pp. 38S-3S9. 



