182. HTDBOCAIAMUS. 209 



a. Hgr. (V. 140 ; 0. 94). Belize. F. D. Godman, Esq.rP.]. 



b-d. d (V. 137; 0. 91), Stann Creek, Brit. Rev. J. Robertson [CT.]. 



$ (V. 142; 0.?), & Honduras. 



hgr. (V. 189 ; C. 85). 



e. Hgr. c? (V. 135; ? (Type.) 



C. 93). 



9. Erythrolamprus piceivittis. 



Conioplianes piceivittis, Cope, Proc. Amer. PhUos. Soc. xi. 1869, 



p. 149; Bocourt, Miss. 8c. Mex., Rept. p. 656, pi. xli. fig. 2 



(1886). 

 Tachymenis tseniata, Peters, Man. Berl. Ac. 1869, p. 876. 

 piceivittis, Gunth. Ann. 8f Mag. N. H. (4) ix. 1872, p. 20, and 



Biol. C.-Am., Sept. p. 160 (1895). 

 Erythrolamprus piceivittis, Cope, Bull. U.S. Nat. Mm. no. 32, 1887, 



p. 77. 



Snout moderate, rather strongly depressed, rounded. Eosfcral 

 nearly twice as broad as deep, visible from above ; internasals much 

 shorter than the prsefrontals ; frontal once and a half as long as 

 broad, as long as its distance from the end of the snout, shorter 

 than the parietals ; loreal a little longer than deep ; one prasocular, 

 with a subocular below it ; two postoculars ; temporals 1+2; eight 

 upper labials, fourth and fifth entering the eye ; five lower labials 

 in contact with the anterior chin-shields, which are as long as or a 

 little longer than the posterior. Scales in 25 rows. Ventrals 158- 

 169 ; anal divided ; subeaudals 82-93. Dark brown above, with 

 two whitish longitudinal streaks which extend to the canthi 

 rostrales ; these streaks may be interrupted on the occiput ; upper 

 lip and sides brownish white ; lower parts uniform white. 



Total length 520 milUm. ; tail 150. 



Mexico. 



a. S (V. 162 ; 0. 91). Yucatan. 



b. S (V. 164 ; 0. 93). Mexico. 



182. HYDROCALAMUS. 



Hotnalopsis, part., Dum. ^ Bibr. JErp. Gin. vii. p. 967 (1854). 

 Hydrocalamus, Cope, Proc. Amer. Philos. Soc. xxii. 1885, p. 176 ; 

 Bocourt, Miss. Sc. Mex., Rept. p. 811 (1896). 



MaxiUary teeth 12, gradually increasing in size and followed, 

 after an interspace, by a pair of feebly enlarged grooved fangs 

 situated behind the vertical of the eye ; mandibular teeth subequal. 

 Head slightly distinct from neck ; eye small, with round pupil ; 

 nasal entire or semidivided. Body cylindrical ; scales smooth, 

 without apical pits, in 21 rows ; ventrals rounded. Tail moderate ; 

 subeaudals in two rows. 



Central America. 

 VOL. in. p 



