1869.] ^'^ ' [Cope. 



one or two crossings above. Below black, with large transversely oval 

 yellow spots, which extend to the third row of scales, and include three 

 or four gastrosteges at intervals of the same width. Length, 17.5 inches, 

 tail, 7 inches. 



From Pebas on the Amazon in Equador. From Prof. Orton. 



This species appears to be nearest the E. narducci of Jan. 



Trigonocephalus (Bothrops) akboreits, Cojje. 



Scales in thirty-five longitudinal series, all carinate except the inferior. 

 Eight superior labials which diminish in size posteriorly, bounded above 

 behind posterior line of orbit by seven small scales, which are not distin- 

 guishable from those of the temple. Second labial forming anterior 

 boundary of fossa ; two rows scales between fourth and orbit. Inferior 

 labials eleven. Three scales on the canthus above, the anterior two large, 

 forming with a pair on top of the muzzle a shielded space of six plates. 

 Supercilaries lai'ge, separated by nine rows. Gastrosteges 201, urosteges 

 64 pairs. The body is much compressed, and the coiled tail with 

 slightly expanded prehensile extremity, appropriately to arboreal life. 



Color, greenish yellow, the first series of scales yellow, ends of the gas- 

 trosteges with a green line. Dorsal region with faint brownish yellow 

 spots often paired ; many scales black edged. Labial scales of both 

 jaws black edged ; a black band with yellow interruptions from eye to 

 angle of mouth. 



This handsome and venomous tree serpent was discovered by Dr. 

 Otho Wucherer, near to Bahia, Brazil. It is a near ally of the B. bilinea- 

 tus of Nieuwied, but that animal has 27-9 rows of scales, and the top of 

 the muzzle is scaled, (as given by Schlegel in the atlas of his Physionomie 

 des Serpens), and the color is slightly different. 



Trigonocephalus (Bothrops") pubescens, Coj;^. 



Scales in twenty-three rows, all including the inferior, keeled. Eight 

 superior labials, the fourth longest, and separated from the orbit by three 

 rows of scales. Second not extending to the front of the maxillary pit. 

 Posterior labials quadrate shorter. Seven rows of scales between super- 

 ciliaries ; two on canthus rostralis above, besides the edge of the preocular. 

 The anterior quite large, flat, the second separated by five rows scales. 

 Maxillary, palatine and pterygoid, mandibular and laryngeal margins 

 with the fang sheaths, silky pubescent, forming short longitudinal 

 fringes. Color, brown, with blackish brown spots on each side fropi ver- 

 tebral line to fourth row of scales. The spots are rounded and pale 

 edged and alternating. They are divided by a longitudinal line of the 

 ground near their middle. There are in their intervals above, round pale 

 edged brown spots. A brown band from eye to angle of mouth, pale 

 edged below ; a similar band across head in front of superciliaries ; two 

 divergent brown spots behind the same plates, and two divergent brown 

 bands behind these, all yellow edged. Sides of face and throat thickly 

 brown dusted. Belly closely brown spotted ; widest spots near end of 

 gastrosteges. Gastrosteges 182, urosteges 25. 



One specimen of this serpent was brought by the Thayer expedition 



