58 



COLTJBEIDiE. 



" 2. Lycognathus rhombeatus. 



Oxyrhopus rhombeatus, Peters, Mon. Berl. Ac. 1863, p. 288. 



Eostral twice as broad as deep, just visible from above ; inter' 

 nasals much shorter than the praefrontals ; frontal once and a half 

 as long as broad, longer than its distance from the end of the snout, 

 as long as the parietals ; loreal once and two thirds to twice as long- 

 as deep ; one prseocular, extending to the upper surface of the head 

 but not reaching the frontal; two postoculars ; temporals 2+3; 

 eight upper labials, fourth and fifth or third, fourth, and fifth 

 entering the eye ; four lower labials in contact with the anterior 

 chin-shields, which are as long as the posterior. Scales in 19 rows, 

 Ventrals 223-230 ; anal entire ; subcaudals 110-115. "White, 

 with large black blotches disposed in partly confluent pairs 

 alternating on each side of the vertebral line on the greater part of 

 the body ; two black cross-bands on the neck and complete annuli 

 on the posterior part of the body ; head dotted with black ; lower 

 parts white, some of the black blotches extending on the ventrals. 



Total length 820 millim. ; tail 220. 



Brazil. 



o. (? (V. 220; 0.115). BaHa. Dr. O. Wucherer [0.]. 



147. TEYPANURGOS. 



Boiga, part., Fitzing. N. Class. Rept. p. 29 (1826). 

 Dipsas, part., Schleg. Phys. Serp. ii. p. 267 (1837). 

 Trypanurgos, Fitzing. in Tschudi, Faun. Per., Herp. p. 55 (1845). 

 Lycognathus, part., Dum. 8f Bibr. Erp. Gin. vii. p. 916 (1854). 

 Eudipsas, part., Giinth. Cat. Col. iSn. p. 168 (1858). 

 Oxyrtopus, part., Jan, Flenco sisf. 0/id. p. 92 (1863). 



MaxUlary teeth 13 to 15, anterior much longer than the posterior,- 

 which gradually decrease in size, followed, after an interspace, by a 

 pair of enlarged, grooved teeth situated below the posterior border 

 of the eye; anterior mandibular teeth strongly enlarged. Head 

 distinct from neck ; eye large, with vertically elliptic pupil. Body 

 compressed ; scales smooth, slightly oblique, with apical pits, in 19' 

 rows, the vertebral row enlarged ; ventrals obtusely angulate laterally. 

 TaU long ; subcaudals in two rows. 



Tropical South America. 



1. Trypanurgos compressus. 



Coluber compressus, Dand. Rept. vi. p. 247 (1803). 



leucocephalus, Mikan, Delect. Faun. Flor. Bras. pi. — . fig. 2 



(1820). 

 Boiga leucocephala, Fitzing. N. Class. Rept. p. 60 (1826). 

 Dipsas compressus, Boie, Isis, 1827, p. 560. 



leucocephala, ScJdeg. Phys. Serp. ii. p. 288 (1837). 



Dipsadomorphus compressus, Tsehudi, Faun. Per., Serp, p. 55' 



(1845). 

 Lycognathus leucocephalus, Dum. Sf Bibr. vii. p. 924 (1854). 



