324 



XENODON 



XENODON MERREMI I (Wagler) 



1824 Ophis Merrem i i Wagler, in Spix, Sp. Nov. Serp. Bras.! i] , pi. I]. Type-locality: Bahia, Brazil. 

 1826 X.l enodon j merrem i i — Fitzinger, Neue Classification der Reptilien: 57' 

 71827 Xenodon ocellatus Bole, Isis von Oken, 20: 5*1. Type-locality: Brazil. 

 ?1827 Xenodon a e n e u s Boie, Isis von Oken, 20: 5*1' Type-locality: Surinam. 

 186^ Xenodon irregularis Gunther, Ann. Mag. Nat. Hist., (3) 12: 354, pi. 5, fig. D. Type-locality: 



Para, Braz il. 

 1906 Tr iqonocephalus f lavescens Bacque, Rev. Mus. La Plata, 12: 114, fig. 1. Type-locality: Asuncion, 



Paraguay. 

 1506 Tr i qonocephalus al terna tus b i nocular ius Bacque, Rev. Mus. La Plata, 12: 115, ^'9- 2. Type- 

 locality: Asuncion, Paraguay. 



Distribution: Guianas, Brazil, Bolivia, Paraguay, central and northern Argentina. 



XENODON NEUWIEDI I (Gunther) 



1863 Xenodon Neuwiedii GUnther. Ann. Mag. Nat. Hist., (3) 12: 354, pi. 5, fig. C. Type-locality: Rio 



de Jane i ro, Braz 1 1. 

 1858 Xenodon neov i di i Cope (emendation of neuwiedi i Gunther), Proc. Acad. Nat. So i . Phila., 1868: 133" 

 1522 Xenodon hemileucurus Lutz and Mello, Folha Medica, 3 (I52O): 58. Type-locality: S. SimSo do 



Manhassu, Minas Gerais, Brazil. 



Distribution: Central and southern Brazil, Paraguay, northern Argentina. 



XENODON RABDOCEPHALUS (Wied) 



1824 C.[ oluber J rabdocephalus Wied, Isis von Oken, 6: 668. Type-locality: Brazil, stated further 



as Bahia, Brazil by Wied, Beitrage zur Naturgesch ichte von Brasilien, 1, 1825, 356. 

 1826 X. [ enodon j rabdocephalus — Fitzinger, Neue Classification der Reptilien: 57" 



Distribution: Guerrero and Veracruz, Mexico through Central and South America to Bolivia. 



Content: Two subspecies. 



Key to the subspecies 



1. Ventrals 124-133- 

 Ventrals 141-153- 



Clave de subespecies 



mex icanus 1. Ventrales 124-133- 



- rabdocephalus Ventrales 141-153" 



mex I canus 



- rabdocephalus 



Xenodon rabdocephalus rabdocephalus (Wied) 



I837 X.l enodon j rhabdocephalus Schlegel (emendation of rabdocephalus Wied), Essa i Physion. 



Serpens, 2: 87, pi. 3, figs. 6-7. 

 I858 Xenodon colubr i nus Gunther, Cat. Sn, Brit. Mus.: 55- Type-locality: Para, Brazil. 

 1864 Xenodon anqust i rostr i s Peters, Monats. Akad. Wiss. Berlin, 1864: '}')0. Type-locality: 



Veragua, Panama. 

 I885 Xenodon b i praeocul i s Cope, Proc. Amer. Phil. Soc, 23: 95' Type-locality: R'o Mamore, 



Bol i V ia. 

 1941 I Xenodon rabdocephalus rabdocephalus j — Schmidt (by inference), Zool. Ser. Field Mus. Nat. 



Hist., 22: 501. 



Distribution: Nicaragua(7) through Central America to Colombia, Ecuador, Brazil and Bolivia. 



Xenodon rabdocephalus mex i canus Smith 



1940 Xenodon mex icanus Smith, Proc. Biol. Soc. Washington, 53= 51 • Type-locality: Piedras 



Negras, Guatemala. 

 19*1 Xenodon rabdocephalus mex icanus — Schmidt, Zool. Ser. Field Mus. Nat. Hist., 22: 5''1' 



Distribution: Low and moderate elevations from Guerrero, Mexico , on Pacific and Veracruz, 

 Mexico, on Caribbean south through Guatemala. 



