798 



REPORT OF NATIONAL MUSEUM, 1898.. 



Above and ends of gastrosteges, light brownish-olive; top of head, 

 lips, and inferior surfaces, yellow. Skin between scales, black. Dedi- 

 cated to my friend Dr. L. Stejneger, of the U. S. l!^atioual Museum. 



Zamenis atejnegerianus Cope. 



ZAMENIS CONIROSTRIS Cope. 

 Zamenis coniroatris Cope, American Naturalist, XXIX, 1895, p. 679. 



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 posteri- 

 orly than anteriorly. Parie- 

 tal plates rounded posteri- 

 orly, bordered by three tem- 

 porals and two or three 

 scales. Temporals, 2-2-2. 

 Superior labials normal, 

 regular. Postgeneials 

 equal in length to pregene- 

 ials. Gastrosteges, 162; anal, 1-1; urosteges, 85. 

 Measurements. — Length, 758 mm.; length of tail, 200 mm. 



Cat. No. 1768; rows of scales, 17 ; upper labials, 8 ; gastrosteges, 162; urosteges, 86 ; 

 total length, 730 mm. ; tail, 185 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 tbe other 

 superior surfaces. The muzzle is darker in color than the lips and 

 throat. Skin between scales black. 



Zamenis conirostris Cope. 



Fig. 173. 



Zamenis conirostris Cope. 



= 1. 



Matamoras, Mexico. 



Cat. No. 1768, U.S.N.M. 



This species and the last one are founded on a single specimen each, 

 which were obtained in nearly the same region of country. They 

 resemble each other considerably in proportions, size, and coloration. 

 The differences are, however, so numerous and important that it is 

 impossible to regard them as belonging to the same species. They 



