262 



REPTILlA: SERPENTES: COLUBRIDAE 



*• 



RHADINAEA 



RHADINAEA Cope 



I863 Rhad i naea Cope, Proc. Acad. Nat. Sci. Phila., 1863' 101, Type-species; Taeniophis verm iculat Iceps 

 Cope. 



Distribution! Southeastern United States through Mexico and Central America to Uruguay and northern 

 Argent i na. 



Content: About 40 species, of which 24 are found within limits of this work. 



Comment: Boulenger, Cat. Sn. Brit. Mus., 2, 1854, 160, synonymized Calonotus Jan, I863 (proccupied 

 by Calonotus Agassiz, 1846), with Rhad i naea Cope, and was followed in this synonymy by Romer, 

 Osteology of the Reptiles, 1956, 5^1. Both of the African species included in Calonotus by Jan 

 were considered by Boulenger, I.e., p. I96, to belong to Coronella . however, and there is no 

 valid reason to include Calonotus Jan in this generic synonymy. Romer, I.e., also gave 

 Rhad inella Smith, 19*1> as a synonym of Rhad i naea . but we know of no published documentation of 

 th i s act i on. 



This genus is currently being revised by C. W. Myers, and will be considerably changed from 

 the arrangement seen here upon completion of his work. 



Key to the species 



1. Scale rows at midbody 21 2 



Scale rows at midbody 19 3 



Scale rows at midbody I7 6 



2. Dorsum with longitudinal stripes qodman i 



Dorsum un i col 01 altamontana 



3. Broad lateral dark stripe occupies all of 



fourth and adjacent halves of third and fifth 



scale rows 4 



Not as above 5 



4. With dark stripe occupying adjacent halves of 



first and second scale rows serperaster 



No dark stripe below broad stripe on fourth and 

 adjacent rows hempsteadae 



5. Lateral dark stripe broad, occupying all of 



third and neighboring halves of second and 



fourth scale rows montecr ist i 



Lateral dark stripe narrow, occupying only 

 contiguous halves of third and fourth scale 

 rows stadelman i 



6. Subcaudals fewer than 75 7 



Subcaudals more than 75 16 



Clave de espec i es 



1. Filas de escamas al medio del cuerpo 21- 



Filas de escamas al medio del cuerpo I9- 



rilas de escamas al medio del cuerpo I7- 



2. Diseno dorsal con iTneas long i tud i nales- qodman i 

 Dorso un i forme altamontana 



3. Cinta lateral ancha y oscura ocupa toda la 



cuarta hilera de escamas y las mitades adya- 



centes de la tercera y quinta 4 



No como el anterioi 5 



4. Cinta oscura ocupa las mitades adyacentes de 



primera y segunda hilera de escamas 



serperaste r 



Sin cinta oscura debajo de la cinta ancha en 



cuarta hilera de escamas y adyacentes 



hempsteadae 



5. Cinta lateral oscura, ancha ocupa toda la tei — 



Cera hilera de escamas y las mitades adyacen- 

 tes de la segunda y cuarta hileras- montecristi 

 Cinta lateral oscura, angosta ocupa solamente 

 las mitades contiguas de tercera y cuarta 

 hileras de escamas stadelman i 



6. Subcaudales menos de 75" 

 Subcaudales mas de 75 



-1 

 -16 



7. Upper labials eight- 

 Upper labials seven- 



-12 



7. Labiales superiores ocho — 

 Labiales superiores siete- 



-12 



8. Fourth and fifth labials in orbit; usually I7 



scale rows immediately anterior to vent 9 



Third, fourth and fifth labials in orbit; 

 usually with reduction to 15 anterior to 

 vent brev i rostr i s 



9. More than I3O ventrals 10 



Fewer than I3O ventrals saroent i 



10. Two posterior temporals 11 



One posterior temporal pachyura 



Cuarta y quinta labiales en orbita; usualmente 

 17 hileras inmed iatamente anterior al ano 9 



Tercera, cuarta y quinta labiales en orbita; 

 usualmente con reduccion a I5 delante del 

 ano brev i rostr i s 



9. Mas de I3O ventrales- — 

 Menos de I3O ventrales- 



10 



- saroent i 



10. Dos temporales posteriores- 

 Una temporal posterioi 



11 



- pachyura 



