241 



PHILODRYAS 



11. Sharp canthus rostral i s . 11 + 2 maxillary 



teeth; 15 mandibular teeth pataqon i ens is 



Canthus rostral i s inconspicuous; 15 * 2 

 teeth; 21 mandibular teeth arnaldo i 



-13 



-14 



12. Dorsal pattern uniformly green 



Dorsal pattern not uniformly green- 



13.Ventrals fewer than 205 16 



Ventrals more than 205 v ir i d i ss i mus 



14. Lacking dark vertebral stripe, 3~5 scales wide- 



15 



With dark vertebral stripe 3"5 scales wide 



psammoph i deus 



15.Ventrals more than 200; deep green dorsally, 



posteriorly reddish mattogrossens i s 



Fewer than 200 ventrals; yellowish-green dor- 

 sally, often with scales streaked with black 

 and wh i te pataqon iens i s 



16. Dorsal scales smooth; usually fewer than 120 

 su beau da Is olf ers i i 



Dorsal scales keeled; usually more than 120 



subcaudals- 



-aestivus 



11. Canthus rostralis saliente y n'tido; 11 + 2 



dientes maxilares; 15 dientes mandibulares 



pataqon i ens i s 



Canthus rostral i s imperceptible; 15 * 2 dientes 

 maxilares; 21 dientes mandibulares arnaldo i 



12.Dorso verde uniforme 13 



Dorso no verde uniforme 14 



13.Ventrales menos de 205 16 



Ventrales mas de 205 v ir idiss imus 



14. Sin cinta vertebral oscura de tres a cinco 



escamas de ancho 15 



Con cinta vertebral oscura de tres a cinco 

 escamas de ancho psammoph i deus 



15.Mas de 200 ventrales; dorso oliva oscuro, 



rojizo poster iormente mattoqrossens i s 



Menos de 200 ventrales; dorso verde amarillento 

 con escamas f recuentemente I'neadas de negro y 

 bianco pataqon i ens i s 



l6.Escamas dorsales lisas; usualmente menos de 



120 subcaudales olf ers i i 



Escamas dorsales quilladas; usualmente mas de 

 120 subcaudales aest i vus 



PHILODRYAS AESTIVUS (Dumeril, Bibron and Dumlril) 



I854 Drvophvlax aest i vus Dumeril, Bibron and Dumeril, Erp. Gen., 7: 1111. Type-locality: South 



Amer i ca. 

 1896 Philodryas aestivus — Boulenger, Cat. Sn. Brit. Mus., 3: 128. 



Distribution: Southwestern and southern Brazil; Amazonian Bolivia; Paraguay, Uruguay and northern 

 Argent i na. 



Co 



mment: The composite nature of Herpetodryas aest i vus Schlegel (Essai Physion. Serp., 1837, 186) 

 was noted by Dumeril, Bibron and Dumeril, in Erp. Gen., 7, I854, who restricted Schlegel's name to 

 the Asian material (p. 2O5), and gave a new name to the American material (p. IIU). 

 Unfortunately, they chose the same specific epithet for the latter that Schlegel gave to the 

 former (aest i vgs), and this has led to considerable confusion in later literature concerning the 

 authorship of the names. It is clear that they were dealing with two distinct taxa, and by 

 ■ndicating the American species as Dryophylas aest i vus Nobis they intended this to be a newly 



coined name. We so use it here. 



Content: Two subspecies. 



Key to the subspecies 



1. With 21 scale rows, strongly keeled except 



outer row; black line behind eye 



maneqarzon i 



With 15 moderately keeled scale rows, 

 lacking black line behind eye aest i vus 



Clave de subespecies 



1. Con 21 filas de escamas fuertemente qui- 

 lladas excepto la fila exterior; una I'nea 



negra detras del ojo maneqarzon i 



Con 15 filas de escamas moderadamente qui- 

 lladas; sin I'nea negra atras del ojo 



aestivus 



Philodryas aestivus aestivus (Oumeril, Bibron and Dumeril) 



1900 Philodryas campicola Jensen, Vidensk. Medd. Naturhist. Foren. Kjobnhavn, I5OO: 108. Type- 

 locality: Laqoa Santa, Minas Gerais, Brazil. 



1902 Philodryas subcarinatus Boulenqer. Ann. Mag. Nat. Hist., (7) J: 287. Type-locality: Coloni 

 Ben'tez, Paraguay. 



1524 P.[ seuduromacer ] luqubr is Werner, Sitz. Math.-Naturw i ss. Kl. Akad. Wiss. Wien, I33, abt. 



1: 53- Type-locality: SSo Paulo, Brazil. 

 1959 Philodryas aestivus [ aestivus ] — Ore jas-M iranda. Com. Zool. Mus. Hist. Nat. Montevideo, 4 



(82):' 2. 



Distribution: S3o Paulo, Brazil to Bolivia, Paraguay and northern Argentina. 



