18 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 67 



black annuli disposed more or less regularly in 11 sets of threes, the 

 middle annulus }4 as wide as the outer ones; ground color of back 

 yellowish-white; 1st set of rings on the occiput; head as in elan's 

 figure/ but the black part shows yellow sutures. 



79. MICRURUS HETEROZONUS (Peters) 



Flaps heterozonus Peters, Sitz. Ber. Ges. Naturf. Freunde, Berlin, 1881, 

 p. 52. — BouLENGER, Cat. Snakes Brit. Mus., vol. 3, 1896, p. 417. 



Peru. — 1 specimen, female. No. 60701, collected at the Cosireni 

 River, 4,000 feet altitude, on September 10, 1915, as referred to by 

 Barbour and Noble.* Female, v. 213; c. 17 pairs + 4 single; 16 black 

 rings along the body more or less disposed in threes which character 

 has not been emphasized by previous authors; the rings are narrower 

 than tlieir interspaces, which are a little lighter between two neigh- 

 boring triads than those between internal rings of one triad; 2 rings 

 on the tail; head coloration as described by Boulenger; total length 

 580 mm. 



80. MICRURUS DISSOLEUCUS (Cope) 



Elaps dissoleucus Cope, Proc. Acad. Nat, Sci. Philadelphia, 1859, p. 345. — 

 BoTTLENGER, Cat. Snakes Brit. Mus., vol. 3, 1896, p. 422. 



Venezuela. — 1 specimen of this rare and poorly described species. 

 No. 59865, female, collected by Mr. Curran. Snout obtusely 

 pointed; eye much shorter than its distance from the mouth; rostral 

 broader than deep; frontal narrow and elongate, about twice as long 

 as broad, shorter than the parietals which are very elongate and longer 

 than their distance from the internasals; one prae and two postocu- 

 lars; seven upper labials, third a little larger than fourth, and both 

 entering the orbit, seventh well developed; temporals 1 + 1; three 

 lower labials in contact with anterior chin-shields which are a little 

 shorter than posterior; v. 199; a. 1/1; c. 22 p. Coloration: Six 

 sets of 3 black rings, the middle one-third as wide as the outer; head 

 black above with a yellow transverse band posteriorly situated and 

 covering the posterior half of the frontal, supraocular, and 5th 

 labial, all the upper postocular, 6th labial and anterior temporal, 

 the anterior half of the 7th labial and all the posterior temporals and 

 parietals. Total length, 450 mm. 



81. MICRURUS MIPARTITUS (DumerU and Bibron) 



Elaps mipartitus Dumeril and Bibron, Erp. Gen., vol. 7, 1854, p. 1220. — 

 Boulenger, Cat. Snakes Brit. Mus., vol. 3, 1896, p. 431. 



Elaps microps Boulenger, Proc. Zool. Soc. London, 1913, p. 1036, pi. 108, 

 fig. 2. 



Ecuador. — 2 specimens: No. 62795, female, sent by Mr, Goding: 

 Eye small; t. 1 + 1, anterior very narrow; 4 lower labials in contact 



' Icon. Q6n., pt. 42, 1872, pi. 6, flg. 1. 



« Proc. U. S. Nat. Mus., vol. 58, 1920, p. 619. 



