1895.] Zoology. 679 
Above and ends of gastrosteges, light brownish-olive ; top of head, 
lips, and inferior surfaces yellow. Skin between scales, black. No. 
17,065 U. S. National Museum, Cameron Co., Tex. Dedicated to my 
friend Dr. L. Stejneger of the U. S. National Museum. 
ZAMENIS CONIROSTRIS sp. nov.—The second species of the section of 
the American species of the genus presents the following characters. 
Profile of muzzle much decurved ; rostral plate prominent and sub- 
conic. Frontal plate with concave lateral borders, and expanded 
front, in contact with preoculars. A single loreal which is nearly twice 
as long as deep, and is deeper posteriorly than anteriorly. Parietal 
plates rounded posteriorly, bordered by three temporals and two or 
three scales. Temporals 2-2-2. Superior labials normal, regular. 
Postgenials equal in length to pregenials. Gastrosteges 162 ; anal 1-1; 
urosteges 85. Length 758 mm. length of tail 200 mm. 
The specimen may have been taken near the period of moult, so that 
the color is somewhat uncertain. It is now light brown above, and light 
plumbeous below ; the top of the head not lighter than the other supe- 
rior surfaces. The muzzle is darker in color than the lips and throat. 
Skin between scales black. No. 1,763 U. S. National Museum, Mata- 
moras, Mex. 
This species and the last are founded on a single specimen each, 
which were obtained in nearly the same region of country. They re- 
semble each other considerably in proportions, size and coloration. 
The differences are, however, so numerous and important that it is im- 
possible to regard them as belonging to the same species. They differ 
equally from all others, the nearest approach to the Z. stejnegerianus 
being made by abnormal individuals of the flaviventris form of Z. con- 
strictor, which have eight superior labial shields. The very different form 
of the loreal plate, and its subdivison, in the latter, together with the 
contrast between the color of the head and the dorsum, will distinguish 
it. 
ZAMENIS LATERALIS FULIGINOSUS Cope.—Bascanium laterale 
Hallow. Cope, Proceeds. U. S. Natl. Mus., 1889, f. 147. 
Scales in seventeen longitudinal rows; superior labials eight, the 
fourth and fifth entering the orbit. Muzzle depressed, narrowed and 
rather prominent. Frontal plate much narrowed posteriorly, its width 
equal one-half that of a superciliary plate. Seventh and eighth supe- 
rior labials about equal, of rather wide parallelogrammic form. Tem- 
porals 2-2-2; the last superior large, subquadrate, their posterior 
borders continuous with that of the parietals. Gastrosteges strongly 
angulated ; tail entering 3°58 times in whole length. Scuta, scutella 
and dimensions : 46 
