356 BULLETIN 17 7, UNITED STATES NATIONAL MUSEUM 



labials and throat white ; the ventral scales light anteriorly, darkening 

 as midbody is approached ; a black spot on the outer ends of the first 

 30 ventral plates. 



Remarks. — This subspecies seems to be the rarest of the forms on 

 the island itself. The five cotypes now in the Museum of Comparative 

 Zoology and the four specimens in the National Museum are all that 

 I have seen. Schmidt does not mention that the American Museum 

 of Natural History had an example of the species in 1 92 1 . Boulenger's 

 specimens were either protenus or niger, none being typical parvifrons. 



Variations. — With so small a series, it is not possible to judge what 

 the limits of variation in the ventral and caudal count for this race 

 would be. At present all that can be said is that the ventral plates 

 number around 142 to 149, and the subcaudals 110 to 129. The 

 position of the lateral light stripe seems to be constant, for it extends 

 over the upper half of the fifth and all of the sixth scale-rows, not 

 infringing appreciably on the seventh. 



Specimens examined. — As fisted in table 69. 



Table 69. — Specimens of Leimadophis parvifrons parvifrons examined 



LEIMADOPHIS PARVIFRONS UNCOLNI Cochran 



FiGtJRES 107, 109, 115c 



1931. Leimadophis parvifrons lincolni Cochran, Proc. Biol. Soc. Washington, 

 vol. 44, p. 91.— Barbour, Zoologica, vol. 19, No. 3, p. 139, 1935; Bull. Mus. 

 Comp. Zool., vol. 82, No. 2, p. 161, 1937. 



1930, Dromicus parvifrons niger Barbour, Zoologica, vol. 11, No. 4, p. 114 (from 

 Beata Island) (not of Dunn) . 



Original description. — '^Diagnosis. — Frontal and supraocular plates 

 equal in width measured across the center; intemasals as long as the 

 prefrontals; snout relatively long and narrow in front of eyes; dorsal 

 black stripe only 3 scales in width; light lateral stripe on side of neck 

 appearing broken into spots by the invasion of the sinuous black 

 lateral stripe. 



