

COLUBRIU.K. 



. c? (V. 147; C. 80). California. Smithsonian Institution. 



(As typical of C. mitts.) 



o-c. <5 (V. 160; C.35)& California. Mr. Bridges [C.]. (Types 



$ (V. 100 ; C. 32). of A. purpureocauda.) 



d. Yg. (V. 151 ; C. 84). Murphy, California. Christiania Mus. 



e. $ (V. 101 ; C. 29). Vancouver Id. H.M.S. ' Plumper.' 



19. Contia semiannulata. 



Sonora semiannulata, Baird $ Gir. Cat. N. Am. Kept. p. 117 (1853), 

 and Rep. U. S. Erplor. R. R. x. pt. iii. pi. xxxiii. fig. 88 (1859), 

 and U.S. Mex. Hound. Surv. ii. Kept. pi. xix. fig. 3 (1859). 



Contia semiannulata, Garm. N. Am. Rept. p. 90 (1883). 



Nasal divided ; frontal broader than the supraocular ; loreal 

 longer than deep ; one prseocular ; three postoculars, upper largest 

 and slightly touching the frontal; temporals 1+2; seven upper 

 labials, third and fourth entering the eye. Scales in 15 rows. 

 Ventrals 149 ; anal divided ; subcaudals 39. Orange above, with 

 black cross bands, which form annuli round the tail; sides and 

 belly dull green. 



Total length 240 millim. ; tail 50. 



Sonora. 



According to Cope (Proc. U.S. Nat. Mus. xiv. 1892, p. 601) 

 this species may prove to be the same as C. isozona, the bad state 

 and abnormal condition of Baird and Girard's specimens possibly 

 accounting for the differences on which the two have been 

 separated. 



20. Contia nasus. 



Conopsis nasus, Gtinth. Cat. p. (1858); Peters, Man. Berl. Ac. 



1809, p. 875; Bocourt, Miss. Sc. Mex., Rept. p. 503, pi. xxxv. 



tig. 2 (1883) ; Gtinth. Biol. C.-Am., Rept. p. 97, pi. xxxiv. fig. B 



(1893) 

 Oxyrhina varians, Jan, Arch. Zool. Anat. Fhys. ii. 1802, p. GO. 



(Exorhina) maculata, Jan, I. c. p. 01, and Icon. Gen. 48, pi. ii. 

 figs. 2-4 (1870). 



Conopsis mac ii 1 ;i 1 1 is. Bocourt, I. c. p. 504, pi. xxxv. fig. 3. 



lineatus, Bocourt, 1. c. p. 506, pi. xxxv. fig. 4, and Bull. Soc. Zool. 

 Fr. 1892, p. 41. 



varians, Bocourt, 1. c. p. 500, pi. xxxv. fig. 5 ; Duges, La Natu- 



raleza, (2) i. 1888, p. 123. 

 Ficimia nasus, Garm. N. Am. Rept. p. 83 (1883). 



maculata, Garm. I. c. p. 84. 



Chionactis diasii, Cope, Proc. U.S. Nat. Mus. ix. 1880, p. 188. 



Snout prominent, more or less pointed. Rostral large, the portion 

 visible from above as long as its distance from the frontal ; inter- 

 nasals often fused with the prsefrontals ; nasal entire or semi- 

 divided ; frontal longer than its distance from the end of the snout, 

 as long as the parietals, once and a half to once and two thirds as 

 broad as the supraocular ; a small square loreal present or absent ; 

 one pra- and two (rarely one) postoculars ; temporals 1 +2 ; seven 

 upper labials, third and fourth entering the eye ; anterior chin- 



