■^1920°] DUNN — SOME HAITIAN SNAKES 39 



This is the best known of these forms. It was named by Jan, 

 whose specimens came from Port au Prince. Boulenger's 

 specimens also belong to this race, with the exception of one 

 which is of the following form. Upon including his counts of 

 scales with those of the specimens I have, it is interesting to see 

 how little changed the averages are. This seems to indicate 

 that the variation is small, and the averages near the truth, 

 even though so few spechuens have been counted. Of his 

 seven, fom* were females, and tliree males. The addition of 

 these specimens makes the general ventral average 156.4, the 

 male caudal average 120.4, and the female caudal average 

 113.3, — very little change for an addition of one fourth as 

 many specimens. 



Leimadophis parvifrons niger subsp. nov. 



Diagnosis. — Like L. parvifrons parvifrons, but uniformly black. Ven- 

 trals: 145-156 (average, 151.1); males, 150-155 (average, 152); females, 

 145-156 (average, 150.5). Caudals: females, 111-125 (average, 119.6); 

 males, 123-132 (average, 127). 



Type, M. C. Z., no. 7833, adult female, La Vega, San Domingo. 



Description. — Practically uniformly black; some of the scales in the 

 first three rows anteriorly are light-edged; some white on upper labials; 

 throat mottled with white; under side of tail, in posterior half, white. 



Specimens: Two in type series from La Vega; seven others, from " San 

 Domingo," in the United States National Museum, nos. 55,026-32, col- 

 lected by Abbott. A young specimen in the U. S. N. M. and one of the 

 type series, show traces of striping, and in them the position of the lateral 

 stripe is the same as in the other two races of parvifrons. 



This race apparently inhabits most of San Domingo, save for 

 the higher plateau country which is occupied by protenus. Its 

 caudal count is higher than in either of the other races of par- 

 vifrons, while its ventral count is intermediate. Boulenger's 

 San Domingo specimen was uniformly black. Its scale count 

 also agrees with that of niger, the ventrals being 145, the cau- 

 dals, 123. It was a male. 



