1901.] NATURAL SCIENCES OF rillLADELnilA. 79 



Mr. Van Denburg's largest specimen measured 391 mm. (tail 

 41). 



Hab. — Southern California and Lower California. 



Ophibolus zonatus Blainville. 



Coluber {Zacholus) zonatus Blain., I. c, 293; Ophibolus jyyrrJiomelas 

 Cope, I. c, 610, and Rep. Nat. Mus., 907 ; Coronella zonata BouL, 

 I. c, II, 203 ; Lamj)ropcltis zonatus Van Den., I. c, 167. 



Size rather smaller than boylll, body slender; scutellation gen- 

 erally as in that form; oculars 1 (2)-2; upper labials 7 (6); 

 temporals 2 (l)-3 (2); scales in 21-23 rows; ventrals 199-224; 

 subcaudals 45-66. Length about 900 mm. (tail one-sixth). 



The body is encircled by narrow white or yellow rings, between 

 Avhich are black ones, which are more or less replaced or divided 

 by red; all the rings are narrow, and the red is more pronounced 

 anteriorly, being often altogether absent on the hinder part of the 

 body; head yellow with a black baud across the middle and an- 

 other on the nape. 



Mr. Boulenger, as it appears to me rightly, has referred this 

 species to zonatus of Blainville. 



Hab. — Arizona and southern California. 



Ophibolus rhombomaculatus Holbrook. 



Coronella rhombomaculata, Holb., I. c, III, 103, PI. 23; 0. rJiomho- 

 maculatus B. and G., I. c, 80 ; Cope, I. c., 610, and Rep. Nat. Mus., 

 903 ; Coronella calligaster (part) Bonl-, I. c, II, 198 ; Lampropeltis 

 rhombomaculatus Stej., Proc. U. S. Nat. Mus., 1891, 503. 



Size moderate; body cylindrical and rigid; oculars 1-2; tem- 

 porals 2-3; upper labials 7; anterior chin shields longest; scales 

 in 23-21 rows; ventrals 200-212; subcaudals 44-51. 



Length 790 mm. (tail 110). 



Body color pale brown, with a dorsal series of small dark brown 

 blotches with indistinct black borders; these are about eight or 

 nine scales wide and not more than two long, and may number as 

 many as fifty on the body; the interspaces are wider than the 

 spots; a series of irregular small blotches on the side, often alter- 

 nating with the dorsals and reaching the ventrals, the lower end 

 sometimes breaking ofi and forming a detached spot on the end of 

 the ventrals; belly yellowish white clouded with pale brown; no 

 head bands, nor spots on the nape; a narrow oblique streak behind 

 the eye; labials whitish slightly margined with dark brown. 



