494 PROCEEDINGS OF THE NATIONAL MUSEUM vol.93 



•TRIMORPHGDON TAU Cope 



A single specimen, the type (No. 30338), 3 is in the Museum, labeled 

 "Tehuantepec," but is actually from Quiotepec, Oaxaca, according to 

 Sumichrast. 



TRIMORPHODON UPSILON Cope 



One specimen was found dead in the road 10 km. north of Jacala, 

 Hidalgo (No. 110401). Scale rows 21-23-16; yentrals 226; caudals 

 63 (5); supralabials 8-8; infralabials 12-12; preoculars and post- 

 oculars 3-3; loreals 2-3; blotches on body 27, on tail, 14. 



The Museum has nine other specimens : "Mexico" (Nos. 9911-2. 25361 

 26138-9) ; Guanajuato (No. 11370) ; Guadalajara (Nos. 12419, 31358) ; 

 San Juan Capistrano, Zacatecas (No. 46334 ). 4 



♦TRIMORPHODON VILKINSONII Cope 



A single Mexican specimen, the type (No. 14268), 5 is in the Museum, 

 from "Chihuahua." 



TROPIDODIPSAS SARTORII SARTORII Cope 



Three specimens were obtained, one (No. 109909) at Potrero Viejo, 

 Veracruz; another (No. 109908) at Tenosique, Tabasco; and a third 

 (No. 109907) at Emiliano Zapata, Tabasco. 



The Museum has only one other specimen of this race, from Chun- 

 tuqui, Guatemala (No. 71361). Aside from these I have examined 

 another from Potrero Viejo, Veracruz (EHT-HMS No. 21809), and 

 four in the Museum of Comparative Zoology, three of which are from 

 Alvarez, San Luis Potosi (Nos. 25002-4), the other from Tamazun- 

 chale, San Luis Potosi (No. 45689). In three specimens of this entire 

 series the loreal enters the orbit on both sides (Nos. 109907, 25002, 

 25003), and in one specimen it enters the orbit on one side (No. 25004). 

 In one the nasal contacts a lower preocular below the loreal (No. 21809) , 

 and in No. 25002 the temporal enters the orbit on one side. Other de- 

 tails of variation are given in table 42. The dorsal scales are feebly 

 keeled in all. 



In one Potrero specimen and in the Guatemala specimens the only 

 light band complete about the body is the nuchal collar; the remain- 

 ing light bands reach the edges of the ventrals and caudals. In the 

 other Potrero specimen (No. 21809) 10 of the 13 body bands are very 

 narrowly interrupted medially. In the Tenosique specimen all the 

 light bands are complete about the body, except one immediately pre- 

 ceding the anus. In the Zapata specimen most of the bands are nar- 



* Cope, 1809, p. 152 ; Taylor, 1939b, p. 374, fig. 8, pi. 51. 



* Taylor, 1939b, p. 366. 



« Cope, 1886, pp. 285-286. 



