890 14-. ELAPIDJE 



DENBURGH & SLEVIN, Proc. Cal. Acad. Sci., Ser. 4, Vol. 3, 1913, 

 p. 425; VAN DENBURGH & SLEVIN, Proc. Cal. Acad. Sci., Ser. 4, 

 Vol. 4, 1914, p 147; VORHIES, Univ. Ariz., Agric. Exper. Station 

 Bull. No. 83, 1917, p. 364. 



Micrurus euryxanthus STEJNEGER & HARBOUR, Check List N. Amer. 

 Amph. Rept., 1917, p. 106. 



Description. Head small, with flat top and high, 

 broadly rounded snout. Temporal regions not much wider 

 than neck. Eye very small. Rostral plate large, nearly as 

 high as broad, bounded behind by internasal, anterior nasal, 

 and first labial plates. Plates on top of head are a pair of 

 internasals, a pair of prefrontals, a rather small frontal, 

 supraocular of each side, and a pair of parietals. Anterior 

 and posterior nasals distinct. No loreal. One preocular. 

 Two postoculars. Temporals one followed by two. Supra- 

 labials seven, third and fourth reaching eye, seventh small. 

 Infralabials seven, or six, the fourth usually largest, the 

 first pair meeting on midline. Genials in two pairs, very 

 short. Scales on body smooth, in fifteen rows. Anal plate 

 divided. Gastrosteges varying in number from 215 to 241. 

 Urosteges in two series of from 21 to 29. 



The entire head is black, with the exception of the post- 

 erior extremities of the parietals which are involved in a 

 narrow white or yellow ring around the neck. Behind this 

 white ring is a broad red ring involving about 1 1 scales, 

 more or less. This is followed by another narrow white or 

 yellow ring, some three or four scales wide, and then a 

 black ring about eight scales in width. The whole body and 

 tail are covered with similar broad red and black rings 

 separated by narrow white or yellow ones. These rings of 

 color encircle the body, and are without spots either above 

 or below. The number of black rings on the body and tail 

 varies from nine to 14. 



