112. ATKACTUS. 307 



Snout rounded. Rostral small, once and a half as broad as deep, 

 just visible from above ; interiiasals very small, a little broader 

 than long ; prsefrontals as long as broad ; frontal slightly broader 

 than long, as long as its distance from the end of the snout, much 

 shorter than the parietals ; loreal nearly thrice as long as deep ; 

 two postoculars ; temporals 1 + 2 ; seven upper labials, third and 

 fourth entering the eye ; four lower labials in contact with the 

 single pair of chin-shields, which are moderately large and separated 

 from the symphysial. Scales in 17 rows. Ventrals 148-159 ; 

 anal entire ; subcaudals 21-26. Pale yellowish or reddish brown 

 above, some of the scales edged with black, with numerous regular 

 black transverse spots or bars ; upper lip and lower parts uniform 

 whitish. 



Total length 335 millim. ; tail 40. 



Brazil. 



n. c? (V. 148; C. 26). Brazil? (Tvpe.) 



6. $ (V. 159; C. 21). Temambuco. W'. A. Forbes, Esq. [P.]. 



11. Atractus major. 



Rhabdosnma maculatum (non Giinth., 18o8), Gunth. Proc. Zool. 



Soc. 1859, p. 411. 

 Kabdosoma badium, part., Jan, Arch. Zool. Anat. Phys. ii. 1862, 



p. 13, and Icon. Gen. 11, pi. i. fig. 1 (1865). 



Snout obtuse. Rostral small, nearly as deep as broad, just 

 visible from above ; internasals very small ; praefrontals longer 

 than broad ; frontal as long as broad, or slightly longer than broad, 

 as long as its distance from the internasals or from the rostral, 

 much shorter than the parietals ; loreal twice and a half to thrice 

 and a half as long as deep; two postoculars; temporals 1 + 2; 

 seven upper labials, third and fourth entei'ing the eye ; three lower 

 labials in contact with the single pair of chin-shields, which are 

 moderately large, and separated from the symphysial. Scales in 17 

 rows. Ventrals 163-182; anal entire ; subcaudals 30-45. Brown 

 above, with darker spots, which may be large and light-edged, 

 forming a handsome pattern ; labials yellowish, with brown sutures ; 

 yellowish beneath, dotted or spotted with brown or black. 



Total length 700 millim. ; tail 80. 



Ecuador, Brazil. 



u-h, c. 2 (V. 174, 168 ; C. W. Ecuador. Mr. Eraser [G.]. 



4;^, .30) & vg. (V. 1U3; 

 C. 43). 



d. 2 (V. 170; C. 31). Intac, Ecuador. Mr. Buckley [C.]. 



e. Yg. (V. 182; C. 36). PaUatanga, Ecuador. Mr. Bucklev [C 

 /. Yg. (V. 169; C. 45). Canelos, Ecuador. Mr. Buckley [C 



12. Atractus isthmicus. 



Rabdosoma zebrinum (non Jan), Bocourt, Miss. Sc. Mct., Eept. 

 p. 539. pi. xxxiv. fig. 1 (1883). 



x2 



