Tropidodryas Fitzinger, 1843. Revalidated by Thomas & Dixon, 1977, 
Pearce-Sellards Ser. 27:1-20. Contains: 
serra (Schlegel). 
Te 
T. striaticeps (Cope). 
Typhlops Oppel, 1811. 
Key to continental Neotropical species in Dixon & Hendricks, 1979, 
Zool. Verh. Rijksm. Nat. Hist. 73:1-39. 
1976 T. brongersmianus Vanzolini, Pap. Avul. Zool. (Sao Paulo) 
29:247. Nomen novum for T. brongersmai Vanzolini, 1972, 
Zool. Med. (Leiden) 47:27. Type-locality: Brasil, Bahia, 
Barra de Itaipe, Ilheus. 
- costaricensis Jimenez & Savage. Distribution: Costa Rica 
and Nicaragua. 
microstomus Cope. Distritution: Merida, Mexico, to El 
Paso, Guatemala. 
1979 T. minuisquamus Dixon & Hendricks, Ibid. 73:21. Type-locality: 
Peru, Loreto, Mishana. Distribution: Amazon basin from 
Iquitos area and Manaus area northward to Moroa, 
Venezuela, and on north edge of Guyana Shield, Guyana. 
1979 T. paucisquamus Dixon & Hendricks, Mbdidiacl7 Sze 
Type-locality: Brasil, Pernambuco. 
T. reticulatus (Linnaeus). Distribution: Cis-andean South 
America between 12 N & 14 S, and coastal Ecuador. 
T. stadelmani Schmidt = T. tenuis, fide Dixon & Hendricks, 
19795 Op. “cit. 
T. tenuis Salvin. Distribution: also Honduras. 
T. unilineatus (D.&B.). Distribution: not Neotropical, 
possibly Oriental. 
|A 
Umbrivaga Roze, 1964. 
1979 U. pyburni Markezich & Dixon, Copeia (4):698. Type-locality: 
Colombia, Meta, Loma Linda. Distribution: type locality. 
U. pygmaea (Cope, 1868), fide Markezich & Dixon, 1979, Ibid. 
(4):698-701. 
Uromacerina Amaral, 1929. 
U. ricardinii (Peracca). Distribution: Brasil, Sao Paulo to 
= Rio Grande do Sul; one isolated population in Para 
(Cunha & Nascimento, 1982, Ibid. 113:1). 
Waglerophis Romano & Hoge, 1973, Mem. Inst. Butantan [1972] 36:209. 
Type-species: Ophis merremii Wagler, 1824, monotypic. 
Xenodon Boie, 1824. 
Comment: X. werneri listed as part of French Guiana fauna, fide 
Gasc & Rodrigues, 1980, Bull. Mus. Nat. Hist. Nat., Paris 
(4)2:559-98. 
X. merremii (Wagler) = Waglerophis merremii (Wagler), fide 
Romano & Hoge, 1973, Ibid. 36:209-14. 
X. rabdocephalus rabdocephalus (Wied), fide Dixon, 1983, Texas 
Je Set. 35: 257% 
1824 Coluber rabdocephalus Wied. 
1858 Xenodon colubrinus Gunther. 
Zo 
