656 NOETH AMERICAN SNAKES COPE. 



Eutaenia elegans vagrans Bd. and Gird. 



Euinmia vagrans Bd. audGird., Cat. Serpt. N. Amer., 1S53, p. 35. Yarrow, Wheeler's 

 Kept., U. S. G. Snrv., W. lOOtli mer. v., p. 548 ; Cope, Check List, N. Amer. Batr. 

 Rept., 187.5, p. 41. 



The entire ceutral region, and not elsewhere, except a few speci- 

 mens from tlie northern part of the Pacific region ; extending as far 

 south as the mountains of New Mexico and Arizona, and Humboldt 

 Bay, California. Very abundant. 



Eutaenia elegans conchii Kenuicott. 



Entcenia couchii Keuu., Rept. U. S. Pac. R. R. Snrv., x, Williamson's Rept... p. 10, 

 1857. Eiitamia hammondii Kenuicott, Proc. Acad., Phila., 1860, p. 332. 



This subspecies is easily recognized, and intermediates between E. e. 

 vagrans and E. e. marciana. An approach is made to the markings of 

 the head seen in the latter, while it resembles the young of E. e. vagrans 

 in this respect also. The same E. couchii was based on an exceptionally 

 narrow nosed form from northern California (Pitt River), of which but 

 one specimen has been found. The normal form [E. e. hammoridii) is 

 characteristic of southern California, ranging east to Texas. 



Eutaenia elegans marciana Bd. and Gird. 



Eutcenia marciana Bd. and Gird., Cat. Serpt. N. Amer. 1853, p. 3G. Cope, Check List 

 N. Amer. Batr. Rept. 1875, p. 41. 



This easily recognized subspecies is restricted to the valley of the Rio 

 Grande from Colorado to its mouth. It extends eastward into Texas as 

 far as the Concho and Nueces Rivers.* 



Eutaenia cyrtopsis Kennicott. 



Proc. Acad. Phila., 1800, p. 333, Cope, Check List N. Amer. Batr. Rept. 1875, p. 41. 

 Tropidonotus collaris Jan, Icon. Gen. d. Ophidi n, 25 v, Fig. 2 (too stout). 



This species inhabits the Sonoran. Lower Californiau, and Mexican re- 

 gions. It is well characterized by its wide head and slender body with 

 large eye, large nuchal spots and dorsal stripes running on only one row 

 of scales. There are three subspecies, which differ as follows: 



I. Tail about one-third the total leugth. No large spots below lateral stripe. 



E. c. cyrtojjsis. 



II. Tail between onc-fonrth and one-fifth the length. 



No large spots below lateral stripe E. c. collaris. 



Large spots below lateral stripe alternating with lower lateral spots, and invad- 

 ing lateral stripe E. c. ocellata. 



Eutaenia cyrtopsis cyrtopsis Kennicott. ^ 



EuUenia cyrtopsis Keuu., Proc. Acad. Phila., 1860, p. 533. Cope, Check ListN. Amer. 

 Batr. Rept. 1875, p. 41. 



Prom Durango, Mexico. 



*EuT.KXiA AUGUSTiROSTRis Kenuicott. Proc. Acad. Phila., 1860, p. 332. Cope, 

 Check List N. Am. Batr. Rept. 1875, p. 41. One specimen known ; from Durango, 

 Mexico. 



Eut/i:nia curysocephala Cope, Proc. Amor. Philos. Soc, 1884, p. 173. Orizaba, 

 Vera Cruz, Mexico. 



