188 ___^ — 



REPTILIA: SERPENTES: COLUBRIDAE -^ ^ ^ LYSTROPHIS 



LYSTROPHIS Cope 



1826 Rhinostoma Fitzinqer, Neue Classification der Reptilien; 56. Type-species: Vipera nasua Wagler. 



Suppressed by Int. Comm. Zool. Nomen., Op. 658, 1564, 101. 

 1885 Lystrophis Cope, Proc. Amer. Phil. Soc, 1884: I53. Type-species: Heterodon Dorbignyi 



Oumeril, Bibron and Dumeril. 



Distribution: South and southeastern Brazil, Paraguay, Bolivia, north and central Argentina, and 

 Uruguay. 



Content: Three species. 



Key to the species Clave de especies 



1. Dorsals in 21 rows 2 1. Dorsales en 21 f i las 2 



Dorsals in I5 rows h i str icus Dorsales en I5 filas h i str icus 



2. Tip of tail very rounded; dorsum with succes- 2. Punta de la cola muy redondeada; coloracion 



s i ve rings of black, yellow, black, red; ven- dorsal en anillos negros, amarillos, negros y 



ter predominantly black; ventrals more than rojos; vientre predom i nantemente negro; ven- 



148 sem ic i nctus trales mas de 148 sem ic i nctus 



Tail ending in point; dorsal pattern of rounded Cola puntiaguda; coloracion dorsal de manchas 



black blotches or irregular transverse bands, circulares o bandas transversas irregulares 



usually bordered by yellow; coloration between negras usualmente bordeadas de amarillo; colo- 



spots usually red; venter with equal amounts racion entre las manchas usualmente roja; 



of red and black; ventrals fewer than 148 vientre con igual cantidad de rojo y negro; 



dorb i qny i ventrales menos de 148 dorb i qny i 



LYSTROPHIS DORBIGNYI (Dumeril, Bibron, and Dumeril) 



18S0 "iper a ( Rhinostoma ) nasua Wagler, Nat. Syst. Amphib,: I7I. Type-locality: America. Suppressed 

 by Int. Comm. Zool. Nomen., Op. 658, 1564, 101. 



I854 Heterodon Dorbignyi Dumeril, Bibron, and Dumeril, Erp. Gen., 7' 772. Type-locality: The series 

 of syntypes apparently came from four areas, including Buenos Aires, Montevideo, Santa Cata- 

 rina, and "Bresil", without more precise data. No restrictions have been made. 



1885 '-ystroDhis dorbiqnyi — Cope. Proc. 'Amer. Phil. Soc, 1884: I53, 



1566 Lyst roph i s dorb i qny i- — Orejas Miranda, Copeia, I566: I56, figs. 8a b, ')a-d. 



Distribution; Between 25 and 40° S: southeastern and southern Paraguay, southern Brazil, central 

 Argentina east of the Andes, and Uruguay. 



LYSTROPHIS HISTRICUS (Jan) 



186? Heterodon histricus Jan, Arch. Zool. Anat. Fis., 2: 224. Type-locality: unknown. 



I867 Heterodon naftereri Ste i ndachner, Re i se der Osterre ich i schen Fregatte Novara, Zool., Reptiles; 



50. Type-locality; Brazil. 

 1894 Lystrophis histricus — Boulenger, Cat. Sn. Brit. Mus., 2; I52. 

 1966 Lystrophis histricus — Orejas Miranda, Copeia, I566: 203, "figs. 8e-f, 5f. 



Distribution: Between 15° and 34° S: southern and southeastern Brazil, northeastern Argentina, 

 Paraguay, and northeastern Uruguay. 



LYSTROPHIS SEMICINCTUS (Dumlril, Bibron, and Dumeril) 



I854 Heterodon semi-ci nctus Dumeril, Bibron, and Dumeril, Erp. Gen., 7: 774. Type-locality; "a 



Buenos Ayres et Santa-Cruz" (see note under Lystroph i s dorb i qny i ). 

 I863 Heterodon pulcher Jan, Arch. Zool. Anat. Fis., 2: 222. Type-locality: Bolivia. 

 I854 Lystrophis semicinctus — Boulenger, Cat. Sn. Brit. Mus., 2: I53. 



1528 Lystrophis semicinctus weiser i Muller, Zool. Anz., 77= 72. Type-locality: Catamarca, Argentina. 

 1566 Lystrophis semicinctus — Ore |as Miranda, Copeia, I566: 202, figs. 8c-d, 5e. 



Distribution: Between 20° and 30° S; central and northern Argentina, southwestern Brazil, 

 southern Bolivia, and probably northern Paraguay. 



