14. HELICOPS. ^77 



•fiuboaudals 50-72. Dark olive-brown above, with four more or 

 less distinct blackish stripes ; a yellow stripe along the two lower 

 rows of scales ; yellow or red boneath, with black spots or stripes 

 «n the belly, and a black stripe on the tail. 



Total length 1010 millim.; tail 180. 



Brazil. 



A. Belly with two regular longitudinal series of black spots. 



(C carinicaudus, Wied.) 



^. ? (V. 155 ; C. 64). Brazil. G.L.Conyngham.Eaq. 



[P.]. 



B. Belly with three black stripes. (H. infratcenintus, Jan ; 



H. trivittaiiis, Cope.) 



.b. ? (V. 135 ; 0. 62). Rio Grande do Sal. ' Dr. H. v. Ihering [C. 



C. Belly checkered with black. (H. laliojaster, Cops. 



c. ? (V. 132 ; 0. 70). Rio Grande do Sul. Dr. H. v. Ihsring |_ 



D. Belly anteriorly as in B, posteriorly as in C. 



Jr-e. d (V. 132 ; 0. 72) Rio Grande do Sul. Dr. H. v. Ihering [0.1. 

 &yg. (V. 132; 0.66). 



7. Helicops modestus. 



Helioops oarinacaudus (non Wied), Gray, Cat. p. 71 (1819). 



modestus, Giinth. Ann. ^ Mag. JV. H. (3) vii. 1861, p, 425, fig. 



? Helicops leprieurii, var. moesta, Jan, Arch. Zool. Anat. Phys. iii. 



1865, p. 253. _ 

 Helicops assimilia, Reinh. Vid. Meddel. 1866, p. 161, fig. 



Eye small ; rostral visible from above, forming a narrow suture 

 iwith the internasal ; frontal twice as long as broad, much longer 

 -than its distance from the end of the snout, shorter than the 

 parietals ; loreal deeper than long, sometimes fused with the prse- 

 •ooular ; one or two prae- and two postoculars; temporals 1 + 2; 

 .seven or eight upper labials, third or fourth, or third and fourth, 

 entering the eye ; four or five lower labials in contact with the 

 .anterior chin-shields*, which are as long as or a little shorter than 

 'ithe posterior. Scales in 19 rows, dorsals feebly keeled, laterals 

 smooth. Ventrals 119-125 ; anal divided ; subcaudals 43-67. 

 Dark olive above, with three hghter stripes or with two blackish 

 ■ones ; belly yellowish white, uniform or *ith a few brown spots. 



Total length 490 millim. ; tail 95. 



Brazil. 



* The 3 pairs of nhia-shielcls in the type speeiraea I regard as an aaomaly, 

 .flame as figured in a specimen of Isohnognathus delcayi by DagAs in 1883. 



