24 



REPTILIA: SERPENTES: COLUBRIDAE 



ATRACTUS 



ATRACTUS Wagler 



1828 Atractus Waaler, Isis von Oken, 21: Jil. Type-species: A-tractus trilineatus Wagler. 

 1843 Urobrachys Fitzinger, Systema Reptilium: 24. Type-species: Brachyorrhos f lamm igerus Boie. 

 18S8 Isoscelis Gunther. Cat. Sn. Brit. Mus.: 204. Type-species: Isoscelis maculata Gunther. 

 1910 Atractopsis Despax, Bull. Mus. Hist. Nat. Paris, I6: 372. Type-species: Atractus ( Atractops i s ) 

 pauc i dens Oespax. 



Distribution: Panama; South America as far south as Amazonian Bolivia and southern Brazil, east of 

 Andes and northwestern Ecuador west of Andes; slopes and highlands of Andes in Colombia, Ecuador 

 and Peru. 



Content: Approximately 7" species. 



Comment: Atractus subb ic i nctum Jan is omitted from the data matrix below, because there was 

 insufficient information in the original description. 



Matrix for Identification of Species 



Matriz para ident i f icac ion de especles 



ANDINU5 



ARANGOI 



BADIUS 



BaLZANI 



BISERIATUS 



BOCK I 



BOCOURTI 



BnETTGERI 



boulengerii 



carrioni 



carrioni 



CLARKI 



COLLARIS 



COLLARIS 



Is i gn i f icance of values: 



Pattern 



1 = Spotted or incompletely banded 



2 = Longitudinal lines 



3 = Completely ringed 



4 = Unicolor 

 = Unknown 



X = Combinations of above 



Abbreviat ions * 



R/P = Rostral larger than prefrontals. 



I/P = Width of internasals larger than half 



length of prefrontal suture. 

 No L. = No loreal. 

 L/PN = Loreal larger than postnasal. 



ISignificado de valores: 

 Sexo D i seiio 



= Desconocido 



1 = Macho 



2 = Hembra 



3 = Juvenil 



1 



Con manchas o bandas incom- 

 pletas 



2 = L'neas long i tudinales 



3 = Con anillos completes 



4 = Unicolor 



= Desconocido 

 X = Comb inac iones de los otros 

 Abreviaturas * 



R/P = Rostral mas grande que pref rontales. 

 I/P = Ancho de Internasales mayor que la mitad de 



la longitud de la sutura prefrontal. 

 No L. = Loreal ausente. 

 L/PN = Loreal mas grande que postnasal. 



*(See iavage, 

 Atractus ). 



Publ. Mus. Zool. Univ. Mich., 112, I56O, 16, for discussion of these characters in 



