268 COLTTBRIDJE. 



«. d (V. 147; C. 36). California. Smithsonian Institution. 



(As typical of C. mitis.) 



b-c. <S (V. 160; C.36)& California. Mr. Bridges [C.]. (Types 



$ (V. 166 ; C. 32). of A. purpureocauda^ 



d. Yg. (V. 151 ; C. 34). Murphy, California. Christiania Mus. 



e. ? (V. 161 ; 0. 29). Vancouver Id. H.M.S. ' Plumper.' 



19. Contia semiannulata. 



Sonora semiannulata., Baird Sf Gir. Cat. N. Am. JRept.v. 117 (1858), 

 and Rep. IT. S. Explor. JR. H. x. pt. iii. pi. xxxiii. fig. 88 (1859), 

 and U.S. Mex. Sound. Surv. ii. JRept. pi. xix. fig. 3 (1859). 



Contia semiannulata, Garm. iV. Am. Mept. p. 90 (1883). 



Nasal divided ; frontal broader than the supraocular ; loreal 

 longer than deep ; one praeocular ; 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, vrith 

 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 O. isozona, the bad state 

 and abnormal condition of Baird and Girard's specimens possibly 

 accounting for the diiferenoes on which the two have been 

 separated. 



20. Contia nasus. 



Conopsis nasus, Giinth. Cat. p. 6 (1858); Peters, Man. Bei-l. Ac. 



1869, p. 875 ; Bocourt, Miss. Sc. Mex., Kept. p. 563, pi. xxxv. 



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



(1893) 

 Oxyrhina varians, Jan, Arch. Zool. Anat. Phys. ii. 1862, p. 60. 

 (ExorHna) maculata, Jan, I. c. p. 61, and Icon. G^n. 48, pi. ii. 



figs. 2-4 (1876). 

 Conopsis maculatus, Bocourt, I. c. p. 664, pi. xxxv. fig. 3. 

 lineatus, Bocourt, I. c. p. 565, pi. xxxv. fig. 4, and Bull. Soc. Zool. 



Fr. 1892, p. 41. 

 varians, Bocourt, I. c. p. 666, pi. xxxv. fig. 5 ; Dugis, La Natu- 



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

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



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



Ohionactis diasii. Cope, Proc. U.S. Nat. Mus. ix. 1886, p. 188. 



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

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

 nasals often fused with the prasfrontals ; 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 prse- and two (rarely one) postoculars; temporals 14-2; seven 

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



