112 OPHIDIA. 
Dromicus ater, and, on the authority of Jan, a variety named “ inconstans,” said to 
occur in Mexico. It appears to me very doubtful whether this truly West-Indian type 
«éxtends into any part of the American Continent. | 
Also the occurrence in Mexico of Dromicus pleii (Dum. & Bibr.) (see Bocourt, Miss. 
Sc. Mex., Rept. p. 728) requires confirmation. The type of this species has a series of 
spots along each side of the abdomen ; it is a native of Martinique. 
1. Dromicus fugitivus. 
Coluber fugitivus, Donndorf, Zool. Beitr. i. p. 206 (1798). 
Dromicus fugitivus, Ginth. Col. Sn. p. 182; Bocourt, Miss. Sc. Mex., Rept. p. 708, t. 50. figg. 4, 
4: ae. 
Coluber cursor, Shaw, Gen. Zool. iii. pt. 2, p. 510 (1802). 
Herpetodryas cursor, Schleg. Phys. Serp. ii. p. 199. 
Dromicus cursor, Dum. & Bibr. vii. p. 650; Jan, Iconogr. xxiu. t. 5. figg. 1-3. 
Hab. Guaremata (Morelet).—West INDIES. 
2. Dromicus laureatus. (Tab. XL. fig. A.) 
Dromicus laureatus, Giinth. Ann. & Mag. N. H. 1868, 1. p, 419, t. 19. figs. E. ° 
Rhadinea loreata, Cope, Journ. Ac. N. Sc. Phil. viii. p. 140. 
Hab. Mexico, Mexico city (Doorman), La Cumbre de los Arrastrados (A. C. Buller). 
Scales smooth, in seventeen rows. Form of the head as in Coronella levis; body and 
tail moderately slender; tail one-third of the total length. Eyes of moderate size. 
The rostral just reaches the upper surface of the head; anterior frontals scarcely half 
as large as posterior; vertical longer than the snout, but shorter than the occipitals, 
which are rounded behind ; loreal square; one preorbital, reaching to the upper surface 
of the head, but not extending on to the vertical ; two postoculars; seven upper labials, 
the third and fourth entering the orbit; temporals 1+2-++3, the anterior in contact 
with both postoculars; two pairs of chin-shields, nearly equal in length; ventrals 163 ; 
anal bifid; subcaudals 95. <A lead-coloured band, three scales broad, runs from the 
nape, along the median line of the back, to the end of the tail; flanks reddish, with a 
very indistinct greyish streak along the fourth outer series of scales; two yellow lines 
across the rostral, the lower running along the upper labials and across the neck, thus 
entirely encircling the head ; the upper runs along the canthus rostralis, and stops or 
terminates in the temporal region. Lower parts uniform yellowish. The dentition of 
this species is neither distinctly diacranterian nor syncranterian. The maxillary is 
armed with nine teeth, gradually becoming stronger, longer, and more widely set 
behind; the last is conspicuously the longest, but scarcely more distant from the 
penultimate than this is from the antepenultimate, although these three teeth are 
much more distant than the others are from each other. 
