THE HERPETOLOGY OF HISPANIOLA 217 



regions that perhaps will never be satisfactorily assignable to one of 

 the known subspecies, as isolation has not yet played the part in the 

 main central portion of Hispaniola that it has so obviously done upon 

 the outlying insular and peninsular forms such as typical personatus 

 at the extreme southwest and mentalis in the northeast. 



The lizards from northern Haiti have some of the characters of 

 scalaris, mentalis, or barahonensis without being very definitely any 

 one of them. The Hinche specimen, M.C.Z. No. 25431, was once 

 recorded by me as semilineatus. I now believe that it may represent 

 an intergrading form toward beatanus. 



LEIOCEPHALUS PERSONATUS SEMILINEATUS Dunn 



Figures 64, 65c; Plate 2, A 



1920. LeiocepJialus semilineatus Dunn, Proc. New England Zool. Club, vol. 7, 

 p. 33 (type locality, Thomazeau, Haiti). — Cochran, Proc. Biol. Soc. Wash- 

 ington, vol. 41, p. 54, 1928 (part) (Morne a Cabrits). — Barbour, Zoologica, 

 vol. 11, No. 4, p. 99, 1930; vol. 19, No. 3, p. 122, 1935; Bull. Mus. Comp. 

 Zool., vol. 82, No. 2, p. 137, 1937. — Barbour and Loveridge, Bull. Mus. 

 Comp. Zool., vol. 69, No. 10, p. 289, 1929. 



Description. — U.S.N.M. No. 59144, an adult male from Morne a 

 Cabrits, Haiti, collected by J. B. Henderson and Dr. Paul Bartsch on 

 April 24, 1917. Head shields large, entirely smooth, three scales (an 

 internasal and two prefrontals) in a line between the rostral and the 

 beginning of the supraorbital ring; prefrontals and internasals em- 

 bracing a medial series of three contiguous scales, the anterior smallest 

 and not in contact with the rostral, the central scale the largest; 

 posterior prefrontals much the larger; both pairs of prefrontals 

 directly in contact with the canthals; two can thai scales, the first one 

 short and wide, the second much longer, followed by five superciliaries, 

 the first three of which are exceedingly long, narrow, and overlapping, 

 the last two rather small; five supraoculars, separated incompletely 

 from the superciliaries and from the frontals on either side by a single 

 interrupted series of small scales; frontals moderately large, in contact 

 along their entire inner margin; occipital very small, bordered laterally 

 by two pairs of parietals, the inner slightly the larger and about four 

 times as large as the occipital; four upper and five lower labials to a 

 point directly beneath the center of the eye; temporal scales smooth 

 in front of the ear; an enlarged smooth scale accompanied by one or 

 two slightly smaller ones on the upper anterior corner of the ear ; the 

 scales between them and the parietals small and keeled; anterior 

 margin of the ear with four enlarged projecting scales. Dorsal 

 scales moderately large, imbricate, and somewhat mucronate, the 

 rows converging along the center of the back ; laterals slightly smaller 

 than the dorsals, their keels directed upward and backward ; ventrals 

 about equal to the dorsals in size, smooth, their posterior edges 



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