14. HELicoPs. 275 



ishorter than the parietals ; loreal trapezoid ; one prae- and two 

 postoculars ; parietal in contact with the sixth lahial ; temporals 

 1 + 2 ; eight upper lahials, third and fourth entering the eye ; five 

 lower labials in contact with the anterior chin-shields, which are 

 shorter than the posterior. Scales perfectly smooth, in 19 rows, 

 Veutrals 132-146; anal divided; subcaudals 45. Dark oliye- 

 brown, with two broad paler stripes ; lower parts uniform yellow. 



Total length 530 millim. ; tail 100. 



Angola. 



.a-6. S (V. 146,132; 0.?, Duque de Br^ance. Prof. Barhoza du Bo- 

 45). * cage [P.]. (Types.) 



3. Helicops septemvittatus. 



Calopisma septemvittatum, Fischer, Verh. naturw. Ver. Hamb. (2) iii. 



1879, p. 84, pi. i. fig. 3. 

 LinmopHs septemvittatus, Cope, Proc. Am. Philos. Soc. xxii. 1885, 



p. 177. 



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

 -with the internasal ; frontal nearly twice as long as broad, widening 

 behind, longer than its distance from the end of the snout, shorter 

 than the parietals ; loreal deeper than long ; one prse- and two 

 postoculars; temporals 1 + 2 ; eight upper labials, fourth entering 

 the eye ; five lower labials in contact with the anterior chin-shields, 

 which are longer than the posterior. Scales perfectly smooth, in 

 19 rows. Ventrals 122-130 ; aual divided ; subcaudals 53-73. 

 Brown above, with four black stripes ; belly yellowish white, with 

 three black stripes. 



Total length 238 millim. ; tail 73. 



Mexico. 



4. Helicops allenii. 



Helicops allenii, Gartnan, Proc. Bost. Soc. N. H. xvii. 1874, p. 92, 



and N. Am. Rept. p. 34, pi. vii. fig. 4 (1883). 

 Liodytes allenii, Cope, Froo. U.S. Nat. Mus. xiv. 1892, p. 667. 



Eye rather small, half the length of the frontal. Rostral broader 

 than deep ; nasals in contact behind the rostral ; frontal once and 

 two thirds to twice as long as broad, much longer than its dis- 

 tance from the end of the snout, shorter than the parietals ; loreal 

 trapezoid; one prse- and three postoculars ; temporals l-f-2 ; eight 

 upper labials, third and fourth entering the eye ; posterior chin- 

 .fihields longer than the anterior. Scales in 19 rows, smooth or 

 faintly keeled on the body, distinctly keeled on the tail. Ventrals 

 121-128 ; anal divided ; subcaudals 58-63. Light reddish brown 

 above, with a dark brown vertebral stripe five scales wide ; a 

 narrower dark brown stripe on each flank; upper lip and lower 

 parts yellowish. 



Total length 400 millim. ; tail 110. 



Florida. 



.«. d (V. 121 ; 0. 63). Lake Kerr, Florida. A. Erwin Brown, Esq, 



[P.], 



i2 



