456 
TIscHNOGNATHUS DEKAY!I, Dum. et Bibr. 
Tropidonotus dekayi, Holbr. 
Two specimens of this small Snake were brought to me at Coban 
by the Indians. The other species of this limited genus, I. oceipito- 
maculatus, I never met with. It seems to have a more northern 
range. 
SPILOTES CORAIS. 
Coluber corais, Cuv. 
Spilotes corais, Dum. et Bibr. p. 222. 
Duefias and Lanquin, not uncommon. The specimens which I 
collected belong to the Mexican variety described by Duméril as 
Spilotes melanurus. 
HeERPETODRYAS BODDAERTII. 
Coluber boddaertii, Seetzen in Meyer’s Archiv, ii. p. 59. 
Herpetodryas boddaertii, Schleg. 
Two specimens from Duefias were brought to me by the Indians. 
These examples have a dark streak down the centre of the back, and 
two paler lateral streaks, constituting a very marked variety. They 
do not, however, differ in other respects. 
HERPETODRYAS BRUNNEUS, Giinther, Cat. Col. Snakes, p. 116. 
I picked up a specimen of this Snake on the road between Coban 
and Lanquin. It had been killed by some Indians passing. Another 
was sent to me by Mr. Owen from San Gerdnimo. In life the upper 
parts are grass-green, not brown as in the description. This colour 
disappeared almost immediately after the specimen was put into spirits. 
I believe it is known as a fact, that the green snakes become blue in 
spirits. This appears an exceptional case ; for the skin is blue, while 
the epidermis has become brown. 
HeERPeETODRYAS RApPiI, Giinther. 
One specimen, a young one, was caught under the wall of a house 
in Duenas. 
HeErRPETODRYAS FLAVIGULARIS. 
Psammophis flavigularis, Hallow. Proc. Ac. Nat. Se. Philad. 1852, 
p: 178. 
Herpetodryas flavigularis, Ginther. 
One specimen, a very large one, but a good deal injured, was sent 
to me by Mr. Owen from San Gerénimo. I took a rat from the 
stomach. 
DROMICUS MARGARITIFERUS. 
Herpetodryas margaritiferus, Schleg, Ess.ii. p. 184. 
Dromicus margaritiferus, Gimther. 
The scales of this species are in life decidedly bluish with a black 
