422 PROCEEDINGS OF THE ACADEMY OF [1889. 



of the head, including the 7th and 8th superior labials, blackish- 

 brown, slightly maculated with dull chestnut just behind the oc- 

 cipital* ; the dorsal yellow line being slightly indicated on the dark 

 patch. Beneath white, with a creamy tinge anteriorly, becoming 

 pale greenish on the sub-caudals. The labials are margined with 

 blackish-brown ; a post-oral cream-colored crescent with the concave 

 side forward ; a similar band passing down on the post-orbitals 

 Avidens on the 6th upper labial and runs into the throat color and a 

 third light band is indicated on the ante-orbital, becoming lost on 

 the 4th upper labial, iris bright copper color. 



Abdominal scutelhe 156. Sub-caudals 63 pairs. Total length 

 m .510 (20 1-8 in.) length of tail .110 (4 5-16 in.) 



This species somewhat resembles E. marciana in form and general 

 pattern of coloring, as well as. in an extreme boldness and aggres- 

 siveness when handled, but is much darker ; has the lower row of 

 spots replaced by a shining black band below the lateral light stripe 

 and is well marked by the extension of the ante-orbital upward to 

 meet the vertical and the increased number of temporals. 



The specimen was captured in September last, in the vicinity of 

 Tucson, Arizona, and was sent to the Zoological Society through 

 the courtesy of one of its corresponding members, Mr. Herbert 

 Brown, of that city. 



