160 COLUBRID.E. 



4. Aporophis amcenus. 



Enicognathus amoenus, Jan, Arch. Zool. Anat. Phys. ii. 1863, p. 270, 

 and Icon. Gen. 10, pi. ii. fig. 1 (18150). 



Rostral broader than deep, just visible from above ; internasals 

 nearly as long as broad, a little shorter than the praefrontals ; 

 frontal twice as long as broad, considerably longer than its distance 

 from the end of the snout, as long as the parietals ; loreal a little 

 deeper than long ; one pne- and two postoculars ; temporals 1 + 2 ; 

 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 shorter than the posterior. Scales in 17 

 rows. Ventrals 137-143 ; anal divided ; subcaudals 92-94. 

 Olive-brown above, with a blackish vertebral line, which is indis- 

 tinct or absent on the anterior half of the body : two outer rows of 

 scales grey-brown, third row black, with a round white spot in the 

 centre of each scale ; a black streak on each side of the head, 

 passing through the eye ; upper lip white ; lower parts white, with 

 a lateral series of black dots. 



Total length 590 millim. ; tail 210. The specimen in the 

 collection measures 235, tail 75. 



Brazil. 



a. Yg. (V. 137 ; C. 92). Theresopolis, Prov. Rio Dr. E. A. Goldi [P.]. 

 Janeiro. 



81. RHADIKEA. 



Liophis, part., Wagl. Syst. Amph. p. 187 (1830) ; Dum. 8f Bibr. Erp. 



Gen. vii. p. 697 (1854) ; Giinth. Cat. Col. Sn. p. 42 (1858) ; Jan, 



Arch. Zool. Anat. Phys. ii. 1863, p. 287. 

 Coronella, part., Schleg. Phys. Serp. ii. p. 50 (1837) ; Giinth. I. c. 



p. 34 ; Jan, I. c. p. 236. 

 Dromicus, part., Dum. 8f Bibr. t. c. p. 646 ; Giinth. 1. c. p. 126 ; 



Cope, Proc. Ac. Philad. 1862, p. 76 ; Jan, Elenco sist. Ofid. p. 66 



(1863) ; Bocourt, Miss. Sc. Mex., Sept. p. 707 (1890). 

 Ophiomorphus (non Dej.), Cope, 1. c. p. 75, and Proc. U.S. Nat. 



Mus. xii. 1889, p. 144. 

 Lygophis (non Tsch.), part., Cope, I. c. 



Rhadmaea, Cope, Proc. Ac. Philad. 1863, p. 100, and 1868, p. 132. 

 Calonotus (non Hiibn.), Jan, I. c. p. 239. 

 Diadophis, part., Jan, 1. c. p. 261 ; Bocourt, Miss. Sc. Mex., Kept. 



p. 618 (1886). 



Enicognathus, part., Jan, 1. c. p. 266 ; Bocourt, I. c. p. 625. 

 Ablabes, Jan, I. c. p. 279. 

 Aporophis, part., Cope, Proc. Am. Philos. Soc. xvii. 1877, p. 34. 



Maxillary teeth 14 to 24, posterior largest, forming an uninterrupted 

 series, or the two or three hindermost separated from the others 

 by a very short interspace ; mandibular teeth subequal. Head but 

 slightly distinct from neck ; eye moderate or rather small, with 

 round pupil. Body cylindrical ; scales smooth, without apical pits, 



