REPTILES OF HVACHIJCA MOUNTAINS— STEJNEGER. - 155 



also shortened; the rostral is very wide and its edj^es detached; first 

 pair of infralabials are elongated ver}^ much posteriorly, forming an 

 unusually long suture, while the mental is reduced to a minimum; the 

 second pair of chin shields ar(^ separated by one or two pairs of scales. 

 In the material I hav^^. been going over at present 1 tind no inter- 

 gradation, and consequently adopt a binominal appellation for the two 

 forms. As might be expected, one or the other of the characters 

 pointed out above may be less pronounced in some specimens than in 

 others, but they hold as well or better than in most other cases of 

 nearly related species of snakes. 



BASCANION FLAGELLUM FRENATUM Stejneger. 



Four adult specimens perf ectl}' characteristic of this form are in the 

 collections from Fort Huachuca, two by Dr. Wilcox (Nos. 19676, 

 19677) and two by Dr. Fisher, May 27, 1892 (Nbs. 22197, 22198). 



BASCANION SEMILINEATUM Cope. 



This species, which was only recently described, appears to be rather 

 connnon among the trees and bushes in the Huachuca Mountains. 

 Lieutenant Benson sent the Museum two very large specimens (Nos. 

 11715, 11716), Dr. Wilcox one (No. 19678), and Dr. Fisher one (No. 

 22200). Van Denburgh ^ also records one specimen collected by Price 

 in the Huachuca Mountains, June 30, 1891. Dr. Fisher caught one 

 (No. 22199) at Fort Bowie, Arizona, on May 21, 1891, swallowing a 

 young Woodhouse's jay in the nest. 



This very distinct and readily recognized species is excellently fig- 

 ured by Giinther in the Reptile part of the BiologiaCentrali- Americana.^ 

 In all our specimens, how^ever, the posterior half of the frontal is much 

 narrower than in the outline drawing of the head on the plate just cited. 



RHINOCHEILUS LECONTEI Baird and Girard. 

 Two specimens from Fort Huachuca, by Dr. Wilcox (Nos. 2110, 2111). 



THAMNOPHIS CYRTOPSIS Kennicott. 



There are six specimens of this snake in the collection from Fort 

 Huachuca, viz: Four by Dr. Wilcox (Nos. 17791, 17795, 19679, 21112), 

 one by Dr. Mearns (No. 21060), and one by Dr. Fisher (No. 22205.) 

 Two of Dr. Wilcox's specimens are from ''the immediate vicinity of 

 the post."' 



I have examined into the question of the alleged subspecies of the 

 present species with some care. In the first place, it turns out that 

 Cope's oceUata, from Helotes, Texas, is absolutely identical Avith Ken 

 nicott's type of cyrtojms (U. S. Nat. Mus., No. 930, from Rinconada, 

 Coahuila, Mexico; not Durango, Mexico, as alleged by Cope.)'' These 

 specimens, it is true, differ from most other specimens in the collec- 



iProc. Cal. Acad. Sci. (2), VI, Aug. 18, 1896, p. 347. 



5 PI. XLVI, fig. A. 



3Proc. U. S. Nat. Mus., XIV, 1891, p. 656. 



