190 



REPTILIA: SERPENTES: COLUBRIDAE 



*** 



MASTIGODRYAS 



M. STIGODRYAS Amaral 



1843 Eudryas Fitzinger (preoccupied by Eudryas Boisduval, 1835)) Systema Reptilium: 26. Type-species: 



Coluber Boddaert i Sentzen. 

 1535 Mast i qodryas Amaral, Mem. Inst. Butantan, 8 (l933"3'')' 157- Type-species: Mast i qodryas dan i el i 



Amaral. 

 1539 Dryadoph i s Stuart (substitute name for Eudryas Fitzinger), Copeia, 1939' 55- 



Distribution; Mexico through Central and South America to Argentina. 



Content: Eleven species arranged in four species groups; one ( brues i Barbour) ex tral im i tal. 



Comment: Romer, Osteology of the Reptiles, 1955, pointed out that Mast i qodryas and Dryadoph i s were 

 Synonymous. He did not use Mast i qodryas for the taxon. It is the prior name, however, and one of 

 us (Peters) has examined the type, which clearly indicates the synonymy of the two taxa, so the 

 earlier name is used here. 



Key to the species 



1. With 17 scale rows at midbody- 

 W i th 15 scale rows at midbody- 



-b if ossatus 



2. Usually nine supralab ials; dorsal pattern lacks 

 alternate lateral and dorsal rectangular dark 

 blotches 3 



Usually eight supralab ials; dorsal pattern with 

 alternate lateral and dorsal rectangular dark 

 blotches pulchr iceps 



3. With vertebral stripe at least anteriorly 4 



Without vertebral stripe anteriorly 6 



4. Lacking lateral stripes, or if present, never 



fused with vertebral stripe posteriorly 5 



Two dorsolateral stripes anteriorly which fuse 

 with vertebral stripe on posterior part of 

 body; lateral dark stripe present plee i 



5. Light lateral line on part of fourth and fifth 



rows sanqu i ventr i s 



Light lateral line on third row dorsal i s 



6. Dorsum unicoloi 



Some indication of dorsal pattern- 



-7 



7. Subcaudals fewer than 100 dan 1 el i 



Subcaudals more than 100 melanolomus 



8. Pattern reticulate, each scale with distinct 



black borders melanolomus 



Pattern not reticulate, each scale may have 

 slightly darker borders 9 



9. One or more light lateral stripes on body 10 



No lateral light stripes melanolomus 



10. Dorsal pattern with one light stripe dorso- 



laterally 11 



Dorsal pattern with two lateral light lines--12 



11. Dorsolateral light line on fourth, fifth and 



sixth rows heath i i 



Dorsolateral light line on fourth and fifth 

 rows boddaert i 



Clave de espec i es 



1. Con 17 filas de escamas en el medio cuerpo 2 



Con 15 filas de escamas en el medio cuerpo 



b i f ossatus 



2. Normalmente nueve supralab iales; diseno dorsal 



sin manchas rectangulares laterales y dorsales 



oscuras alternadas 3 



Normalmente ocho supralab iales; diseno dorsal 

 con manchas rectangulares laterales y dorsales 

 oscuras alternadas pulchr i ceps 



3. Con 1 1 nea vertebral por lo menos anter iormente- 



4 



Sin iTnea vertebral anter i ormente 6 



4. Lineas laterales ausentes, si estan presentes 



nunca fusionadas con la 1 'nea vertebral poste- 



ri ormente 5 



Dos I'neas dorsola terales anteriores que se 

 fusionan con la vertebral poster i ormente; 

 linea oscura lateral presente plee i 



5. L'nea clara lateral sobre parte de la cuarta y 



qu i nta f i las sanqu i ventr i s 



Linea clara lateral sobre tercera f i la- dorsal i s 



6. Dorso unicoloi 7 



Con por lo menos alguna indicacion de diseno 



dorsal 8 



7. Subcaudales menos de 100 dan i el i 



Subcaudales mas de 100 melanolomus 



8. Diseno reticulado, cada escama con consp'cuo 



borde negro melanolomus 



Oisefio no reticulado, cada escama puede tener 

 hordes ligeramente oscuros 9 



9. Una o mas cintas laterales claras en el cuerpo- 



10 



Sin cintas laterales claras melanolomus 



ICDiseRo dorsal con una l'nea dorsolateral clara- 

 11 



Diseno dorsal con dos I'neas claras laterales — 

 12 



11. L'nea dorsolateral clara sobre cuarta, quinta y 



sexta f ilas heath i i 



Linea dorsolateral clara sobre cuarta y quinta 

 f i las boddaert i 



