14. HELicoPs. 275 



shorter than tho parietaLs ; loroal trapezoid ; one ])rLe- and two 

 postociilars ; pai'ietal in contact with the sixth labial ; temporals 

 14-2; eight upper labials, third and fourth eutering: the eye ; five 

 lo^\•er labials in contact Avith the anterior chin-shields, which are 

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

 Ventrals 132-14G ; anal divided ; subcaudals 45. Dark olive- 

 brov.'n, with two broad |)aler stripes ; lower parts uniform yellow. 



Total length 530 millim. ; tail iOO. 



Angola. 



a~b. § (V. 146, 132 ; C. F, Uiique de Bragance. Prof. IJarboza du Bo- 

 4.'3). '^ cage [P.]. (Types.) 



3. Helicops septemvittatus. 



Calopisma septemvittatum, FiscJier, Verh. natuno. Ver. Hamb. (2) iii. 



1879, p. 84, pi. i, tig. :3. 

 Limnophis 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 ; lorcal deejicr than long ; one prte- 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 ; anal 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, Garman, Proc. Bost. Soc. N. H. xvii. 1874, p. 92, 



and N. Am. Sept. p. 34, pi. vii. iig. 4 (1883). 

 Liodytes allenii, C'ojje, Proc. U.S. Nat. Miis. 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 pra)- and tliree postoculars ; temporals 1-1-2 ; eight 

 i;pper labials, tiiird and fourtli entering the eye ; posterior chin- 

 shields 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 Hank ; upper lip and lower 

 parts yellowish. 



Total length 400 millim. ; tail 110. 



Florida. 



a. c? (V. 121 ; C. 63). Lake Kerr, Florida. A. Erwin Brown, Esq. 



[P.]. 



i2 



