90 BULLETIN 187, UNITED STATES NATIONAL MUSEUM 



LEPTODEIRA YUCATANENSIS MALLEISI Dann and Stuart 



Leptodeira yucatanensis malleisi Dunn and Stuabt, Occ. Pap. Mus. Zool. Unir. 

 Michigan, No. 313, 1935, pp. 1-4.— Tayxor, Univ. Kansas Sci. Bull., voL 25. 

 1938 (1939), pp. 327-328, fig. 3, pi. 34, fig. a 



Type.— Umv. Mich. Mus. Zool. No. 73230. 



Type locality. — Tuxpena, Campeclie. 



Range. — Campeclie, western Yucatan through northern Chiapas to 

 Peten and British Honduras (recorded in Mexico from Cozumel Is- 

 land and Colonia Santa Maria, Yucatan; Tuxpefia, Encarnacion, Pital, 

 and Balchacaj, Campeclie; and Palenque, Chiapas), 



Genus LEPTOPHIS Bell 



Leptophis Beix, Journ. Zool., vol. 2, 1825, p. 328. — Oliveb, Occ. Pap. Mus. Zool. 

 Univ. Michigan, No. 462, 1942, pp. 1-16 (annotated check list). 



Genotype. — Leptophis ahaetulla Bell { = Coluber ahaetulla Lin- 

 naeus) . 



Range. — Nayarit and Tamaulipas southward on both coasts to 

 Paraguay. 



Species. — Three; two, including two subspecies each, occur in Mex- 

 ico; 14 other species and subspecies occur in Central and South 

 America. 



KEY TO MEXICAN FORMS OF LEPTOPHIS 



1. No loreal occidentalis praestans 



A loreal 2 



2. Vertebral scales slightly enlarged; paravertebral scales keeled (strongly 



on posterior part of body), others smooth 4 



Vertebral scales not at all enlarged ; all dorsal scales except those in lateral 

 (first) row keeled, at least on posterior part of body S 



3. Black lateral strijjes 1^^ to 2i/^ scale rows wide on posterior part of body; 



veutrals 165 to 174, average 168 mexicanus yucatanensis 



Black lateral stripes obsolete or narrower on iwsterior part of body; 

 ventrals 151 to 173, average 163 mexicanus mexicanus 



4. Ventrals 185 to 186, caudals 160 to 166 in known specimens, diplotropis forreri 

 Ventrals 165 to 181, caudals 126 to 161 diplotropis diplotropis 



LEPTOPHIS DIPLOTROPIS DIPLOTROPIS (Gunther) 



Ahaetulla diplotropis GtJNTHER, Ann. Mag. Nat. Hist., ser. 4, vol. 9, 1872, pp. 25-26, 

 pi. 6, fig. A ; Biologia Centrali-Americana, Rept., 1894, p. 130. 



Leptophis diplotropis [diplotropis] BocoxjiiT, Mission scientifique au Mexique et 

 dans I'Amerique centrale, Kept., livr. 15, 1897, pp. 835-837, pi. 64, fig. 3.— 

 Smith, Proc. U. S. Nat. Mus., vol. 93, 1943, pp. 442-443. 



Leptophis diplotropis aeneus Bocourt, Mission scientifique au Mexique et dans 

 I'Amerique centrale, Rept., livr. 15, 1897, p. 837 (type locality not stated, 

 possibly Michoacan or Jalisco; type in Mus. Hist. Nat. Paris). 



Tyve. — Brit. Mus. Nat. Hist., three cotypes. 

 Type locality. — Tehuantepec. 



