1901.] NATURAL SCIENCES OF PHILADELPHIA. 21 



or orauge, aud the laterals ou the third and fourth row, paler yel- 

 low ; the spots are distinct except when the body color is so dark 

 as to obscure them; belly green to slaty black, with a dark spot at 

 the base of each ventral near the end; parietal spot usually present; 

 labials yellowish or green, heavily margined with dusky. Total 

 length 750 mm. (tail from .20-. 24). 



Although radix usually has 21 rows of scales, four out of five 

 specimens which I have lately received from eastern Missouri have 

 19. 



Hab. — From the Rocky Mountains to Indiana, and the British 

 possessions to Texas. The common species of the plains. 



Eutsenia megalops Kenuicott. 



Proc. Acad. Phila., 1860, 330. 

 Confusion has been introduced into this species by inaccurate 

 description and identification. Typical megalops is from Arizona; 

 its Mexican representative is macrostemma Kenn. Sundry speci- 

 mens of the latter Prof. Cope described under the name insig- 

 niarum, attributing to it markings ob?cure or wanting, as com- 

 pared with macrostemma ; five specimens in the Academy's collection 

 from the City of Mexico, referred by Cope himself to insigniarum, 

 do not, however, bear out this statement, and I can see no reason 

 for regarding that form as distinct from macrostemma,^^ which 

 probably does not enter the United States. 



Eutaenia megalops megalops Kennicott. 



/. c.,330 ; E. mcgdlops and E. macrostemma insigniarum (part) Cope, 

 I. c, 650, 651; T. ordinatus var. macrostemma (part) Bonl., I. c, I, 

 212 ; E. megalops and E. macrostemma Cope, Rep. Nat. Mus., 1025, 

 1029. 



Body moderately stout; tail from .19-.2G of length; eye large; 



scales in 21 rows, the outer irregularly keeled; upper labials 8 (9), 



the last one small; temporals 1-2 (3). Brown or ashy with 



three narrow yellow stripes, the lateral on third and fourth rows; 



spots present, but not very distinct; belly usually green, bases of 



ventrals dusky; no j)arietal nor nuchal spots; a small post-oral 



crescent sometimes present; labials slightly margined; ventrals 



158-164; subcaudals 52-65. Total length of two specimens 



from Tucson: 740 mm. (tail 140), 690 mm. (tail 140). Three 



specimens of this snake were sent to the Zoological Society in 1891, 



i^In his latest work Cope himself abandons insigniarum in favor oi macro- 

 stemma. 



