340 



BULLETIN 17 7, UNITED STATES NATIONAL MUSEUM 



"Description.- — Scales, 17-13; ventrals, 205; anal, divided; caudals,?; 

 oculars, 1-2; temporals, 1-2; eye contained three times in its distance 

 from tip of snout, rostral higher than wide; labials, eight above, 4 and 

 5 entering eye; lower labials ten, five in contact with anterior chin 

 shields, which are as long as the posterior ; nasal separated from loreal 

 by prefrontal, which reaches labials 2 and 3. The scales of the fourth 

 dorsal row bordered with black on upper posterior edge ; scales of first, 

 second and third rows, white anteriorly, darker on posterior part of 

 body; dorsum above scale row four, brown; head and throat blue 

 (green in life?) ; upper labials white, edged above with dark, which is 

 continuous with the stripe along the fourth scale row; belly light gray 



Figure 101. — Uromacer dorsalis: a, Top of head; b, side of head; c, chin. U. S. N. M. No. 

 77083, from La Grande Source, Gonave Island, Twice natural size. 



anteriorly to dark gray posteriorly, a dark dot on ends ot ventrals 

 anteriorly. 



"The type is the only specimen of this form, but its peculiarities 

 are such that there is no doubt of its specific distinctness. Apparently 

 it is derived from U.frenatus." 



Additional specimens were collected by Walter Eyerdam at La 

 Grande Source, Gonave Island. Two are adult males, having 17 

 scale rows around the body, narrowing to 11 at the base of the tail. 

 One has a mutilated body so that a ventral count cannot be made; this 

 specunen, M.C.Z. No. 25559, has 212 caudals and head plates as in the 

 type. The other male has 205 ventrals and 206 caudals and normal 

 head plates also. 



The light lateral stripe appearing on the first four longitudinal scale 

 rows of the type is not apparent in these two specimens, the whole 

 body being a drab-gray above, slightly darker middorsally and on the 

 belly; the light labial stripe is continued however for about two head 



