THE HERPETOLOGY OF HISPANIOLA 



253 



of the chevrons. Some of the largest in the series have not yet devel- 

 oped anything but a few spots in that region, keeping the pale and 

 almost immaculate dorsal coloration which is evidently so typical 

 the young occiduus. 



Figure 68. — Celestus hadius: a. Top of head; h, side of head; c, chin. U.S.N. M. No. 25818, 

 type, from Navassa Island. Twice natural size. 



The Navassa Island form, Celestus hadius, I prefer to regard as a 

 distinct species until fresh material can give a better idea of its range 

 in color and scalation. The old and faded type specimens suggest the 

 coloring of impressus somewhat, and their general build and shortness 

 of limb still more convey the impression that their relationships are 

 here, instead of with the long-legged and heavily patterned Hispaniolan 

 form. 



Specimens examined. — As listed in table 45. 



CELESTUS DARLINGTONI Cochran 



Figure 69 

 1939. Celestus darlingtoni Cochr.\n, Proc. New England Zool. Club, vol. 18, p. 2. 



Diagnosis. — Generally similar to Celestus costatus in scalation but 

 with shorter limbs and tail, fewer subdigital lamellae, fewer scales 

 around the body, smaller adult size, and different coloration. 



Description of the type. — An adult, M.C.Z. No. 44374, from Valle 

 Nuevo, Dominican Republic, in the Cordillera Central southeast of 

 Constanza, elevation 6,000 to 8,000 feet, collected in August 1938 by 

 P. J. Darlington. Head moderately elongate, its width nearly three- 

 fourths its length measured from posterior border of ear. Rostral rec- 

 tangular, twice as wide as higli, not touching the nasal, in contact with 

 first supralabial and followed by a pair of supranasals, which are 

 broadly in contact; a pair of frontonasals slightly larger than the 

 supranasals; prefrontal undivided, irregularly quadrilateral; frontal 

 one and one-half times as long as broad, wider than the supraoculars, 

 in contact broadly with second and third, and narrowly with first; a 



