AHT. 24 SOUTH AMERICAN SNAKES AMARAL 17 



The internasals are broadly contiguous in No. 65552 and touch 

 each other only by their inner angle in No. 65599. The degree of 

 contiguity of the internasals is very variable among all the specimens 

 of ElapomorpJius having a single prefrontal, according to my ex- 

 perience. Boulenger's key for the differentiation of these species, 

 which is based on this character, is therefore quite unreliable. 



74. ELAPOMORPHUS SUSPECTUS Amaral 



Elapomorphus suspectus Amaral, Journ. Washington Acad. Sci., vol. 14, 

 no. 9, 1924, p. 202. 



Argentina. — 1 specimen, No. 48939 (type) sent from Pilar, near 

 Cordoba, by Dr. C. C. Craft. 



75. PELAMYDRUS PLATURUS (Linnaeus) 



Anguis platura Linnaeus, Syst. Nat., ed. 12, vol. 1, 1766, p. 391. 

 Hydrus platurus Boulenger, Cat. Snakes Brit. Mus., vol. 3, 1896, p. 267. 

 Pelamydrus platurus Stejneger, Proc. U. S. Nat. Mus., vol. 38, 1910, p. Ill . 



Ecuador. — 3 specimens, all from the coast of Guayaquil: No. 

 12347 (1st): 1 praeocular; 2 postoculars; 2 suboculars; 9/8 upper 

 labials; (2nd) : 1 praeocular; 2 postoculars; nosubocular; 8 (4,5) upper 

 labials. No. 59433: 1 praeocular; 2 postoculars; 1 subocular; 10/9 

 upper labials. 



76. MICRUKUS SURINAMENSIS (Cuvier) 



Flaps surinamensis Cuvier, Regne Anim., vol. 2, 1817, p. 84. — Boulenger, 

 Cat. Snakes Brit. Mus., vol. 3, 1896, p. 414. 



For the use of Micrurus instead of Elaps as a generic name for 

 these Neotropical and Nearctic species see Stejneger and Barbour.* 



Dutch Guiana. — 1 specimen, female No. 66144 sent from Moengo 

 by Mr. C. Bonne and identified with M. fulvius: lab. 7 (4th) v, 

 181; c. 29 p.; 7 sets of 3 black annuli on the body, 1 on the occiput, 

 1 on the anal region, and 1 on the tail; total length 1,220 mm. 



77. MICRURUS HEMPRICHH (Jan) 



Elaps hemprichii Jan, Rev. Mag. Zool., 1858, p. 523. — Boulenger, Cat. 

 Snakes Brit. Mus., vol. 3, 1896, p. 421. 



Dutch Guiana. — 1 specimen, female. No. 64633, sent from Mo- 

 engo, by Mr. C. Bonne: eye % its diameter from mouth; v. 181; 

 c. 27 p.; black above with pinkish annuli, the black distributed in 

 8 triads of subequal annuli on the body and 1 on the tail; total length 

 805 mm. 



78. MICRURUS TSCHUDH (Jan) 



Elaps tschudii Jan, Rev. Mag. Zool., 1858, p. 524. — Boulenger, Cat. 

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



Peru.— 1 specimen, female. No. 38588, sent by R. E. Coker; v. 207; 

 c. 23 pairs + 5smgle; total length 310 mm. ; snout obtusely pointed; 



« Check-List N. A. Amph. Reptiles, 1917, p. 106, and Amaral Rev. Mus. Paulista, vol. 14, 1924, p. 3. 



