374 BULLETIN 17 7, UNITED STATES NATIONAL MUSEUM 

 IALTRIS DORSALIS (Gunther) 



Figure 116 



1858. Philodryas dor sails Gunther, Catalogue of colubrine snakes in the collection 



of the British Museum, p. 126 (type locality, S. Domingo). 

 1862. Ialtris vultuosa Cope, Proc. Acad. Nat. Sci. Philadelphia, 1862, p. 73 (near 



Jeremie).— Barbour and Loveridge, Bull. Mus. Comp. Zool., vol. 69, No. 



10, p. 283, 1929. 

 1862. Dromicus mentalis Gunther, Ann. Mag. Nat. Hist., ser. 3, vol. 9, p. 128, 



pi. 9, fig. 9 (type locality unknown). 

 1879. Jaltris dorsalis Cope, Proc. Amer. Philos. Soc, vol. 18, p. 273. 

 1896. Ialtris dorsalis Boulenger, Catalogue of the snakes in the British Museum, 



vol. 3, p. 137, pi. 7, fig. 2. — Barbour, Mem. Mus. Comp. Zool., vol. 44, No. 2, 



p. 342, 1914; Zoologica, vol. 11, No. 4, p. 115, 1930; vol. 19, No. 3, p. 140, 



1935; Bull. Mus. Comp. Zool., vol. 82, No. 2, p. 163, 1937.— Cochran, Proc. 



U. S. Nat. Mus., vol. 66, art. 6, p. 15, 1924; Proc. Biol. Soc. Washington, vol. 



41, pp. 54, 127, 1928; Occ. Pap. Boston Soc. Nat. Hist,, vol. 8, p. 188, 1934. 

 1909. Dromicus w-nigrum Werner, Jahrb. Wiss. Anst. Hamburg, vol. 26, pt. 2, 



p. 222. 



Figure 116. — Ialtris dorsalis: a, Top of head; b, side of head; c, chin. U.S.N. M. No. 60606, 

 from Moron, Haiti. One and one-half times natural size. 



Description—Adult, U.S.N.M. No. 60606, from Moron, Haiti, col- 

 lected by Dr. W. L. Abbott on December 23, 1917. Rostral much 

 broader than deep, scarcely visible from above; internasals as long as 

 broad, nearly as long as the prefontals; frontal nearly twice as long as 

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

 the parietals; loreal rectangular, small, a little longer than deep; one 

 preocular not reaching the frontal; two postoculars, the lower the 

 smaller, temporals 1 + 2; the scales bordering the sides of the parietals 

 enlarged; seven upper labials, the third and fourth entering the eye; 

 nine lower labials, the fourth amd fifth the largest, the first four in 

 contact with the anterior chin shields, which are much shorter than 

 the posterior ones. Scales in 19 rows, with two pores sometimes only 

 faintly visible near the tips; ventrals 185; anal divided; subcaudals 

 101 + , the extreme tail tip being gone. Head and body, 544 mm.; 

 tail, 225 mm. + tip. 



