376 BULLETIN 17 7, UNITED STATES NATIONAL MUSEUM 



two, while in the second of Cope's co types of /. vultuosa there is a 

 single postocular on one side of the head. In Werner's type of D. w- 

 nigrum three postoculars are present. The number of labials is 

 constant in this species, there being always seven supralabials and nine 

 infralabials, of which only the first four touch the anterior chin shields. 

 In some cases the lower postocular is very small; it is not surprising 

 that there is some variation in this region, as in No. 60605 and in the 

 type of Werner's w-nigrum. 



The coloration seems to vary greatly in intensity irrespective of age. 

 In No. 9829, which is an adult of good size, over a dozen regular black 

 spots may be counted on the back before they begin to break up, 

 while in No. 60606 only two spots approach a regular outline before 

 breaking up. In Nos. 56047 and 9829 the throat, lips, and ventrals 

 are immaculate, the three remaining snakes having these regions more 

 or less heavily spotted with black dots. 



Specimens examined. — As listed in table 74. 



IALTKIS PARISHI Cochran 



Figure 117 



1932. Ialtris parishi Cochran, Proc. Biol. Soc. Washington, vol. 45, p. 189. — 

 Barbour, Zoologica, vol. 19, No. 3, p. 140, 1935; Bull. Mus. Comp. Zool., vol. 

 82, No. 2, p. 163, 1937. 



Original description. — "Description of the type. — U.S.N.M. No. 

 80773, a male from ten miles east of Baraderes, Haiti, collected on 

 April 7, 1930, by Lee H. Parish and Watson M. Perrygo. Head very 

 broad and depressed, greatly swollen through the temporal region; 

 rostral one and one-half times as broad as deep, scarcely visible from 

 above; internasals longer than broad, as long as the prefrontals; 

 frontal one and one-half times as long as broad, equal to its distance 

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

 rectangular, small, a little longer than deep ; one preocular not reaching 

 the frontal; two postoculars, the lower slightly the larger; temporals 

 1+2, the uppermost of the second temporal series considerably en- 

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

 nine lower labials, the fifth the largest, the first four in contact with 

 the anterior chinshields, which are a little shorter than the posterior 

 ones. Scales in 19 rows, with two pores quite distinctly visible near 

 the tips; ventrals 163; anal divided; caudals 67 plus the tip, which is 

 missing." Head and body, 726 mm.; tail, 206 mm. + tip. 



"Coloration. — Body color above sepia, changing to cinnamon on the 

 snout and lips; head immaculate above; a very conspicuous white line 

 narrowly edged above and below with black emanating from the 

 lower posterior border of the eye and passing diagonally backwards 

 to the commissure of the mouth, bisecting the two last upper labials; 



