in the Collection of the British Museum. 419 
appears asa straight band on the tail. Upper part of the 
head uniform brown, separated from the white colour of the 
lower part by an indistinct black line, which runs from the 
orbit to the angle of the mouth, and is indistinctly edged with 
white below. Ventral and subcaudal shields uniform white, 
having only a blackish spot on the side, as mentioned be- 
fore. 
Two specimens were sent by Mr. John Hauxwell from 
Pebas; they are 12 inches long, the length of the head 
being 4 lines, and that of the tail 33 inches. Another ex- 
ample, collected by Mr. Fraser in Western Ecuador, appears 
to belong to the same species. 
Dromicus laureatus. Pl. XIX. figs. E. 
Scales smooth, in seventeen rows, many with a small apical 
groove. Form of the head as in Coronella levis; body and 
tail moderately slender. Eye of moderate size; the rostral 
does not extend to the upper surface of the head; anterior 
frontals scarcely half as fare as posterior; vertical longer 
than the snout, but shorter than the occipitals, which are 
- rounded behind; loreal square; one preorbital, reaching to 
the ot surface of the head, but not extending on to the 
vertical ; two postoculars; seven upper labials, the third and 
fourth entering into the orbit; temporals 1+2+3, the ante- 
rior 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 ros- 
tral, the lower runs 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. 
_ Qne specimen was in a collection made by Hr. Doorman 
- in the neighbourhood of the city of Mexico, It is 21 inches 
gt head 6 lines, tail 7 inches. 
Phe dentition of this species is neither distinctly diacran- 
terlan 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 panutiiinats than this is from the ante- 
penultimate, although these three teeth are much more distant 
than the others are from each other. 
