1973 Micrurus psyches paraensis Cunha & Nascimento, Publ. 
Avuls. Mus. Paraense Emilio Goeldi 20:276. 
Type-locality: Icoaraci, Belem, Para. Distribution: 
eastern Para, Brasil. 
M. petersi Roze, fide Roze, 1983, Ibid. 46:332. Distribution: 
southeastern Ecuador. 
M. psyches donosoi Hoge, Cordeiro & Romano-Hoge, fide Roze, 
1983, Ibid. [1982] 46:335. Distribution: known only from 
type locality. 
1973 M. psyches paraensis Cunha & Nascimento, Publ. Avuls. Mus. 
Paraense Emilio Goeldi 20:276. Type-locality: Brasil, 
Para, Icoaraci. 
M. sangilensis Niceforo-Maria, fide Roze, 1983, Ibid. 46:334. 
Distribution: northern Colombia, between Cordilleras 
Central and Oriental. 
M. spurrelli (Boulenger, 1914), not M. spurelli. 
M. steindachneri petersi = M. petersi, fide Roze, 1983, Ibid. 
463 33:2. 
M. tricolor = M. frontalis tricolor, fide Roze, 1983, Ibid. 
46:326. 
Ninia Baird & Girard, 1853. 
N. hudsoni Parker. Distribution: also Acre, Brasil (P.E.V.). 
Oxyrhopus Wagler, 1830. 
Extensive ontogenetic and geographic variation of color pattern 
makes the key largely unusable; available descriptions are not much 
help. Identifications should be based on comparison with reliably 
identified specimens. 
QO. melanogenys melanogenys (Tschudi), fide Cunha & Nascimento, 
1983, Bol. Mus. Paraense Emilio Goeldi (Zool.) 122:1-42. 
QO. melanogenys orientalis Cunha & Nascimento, 1983, Ibid. 
122:6. Type-locality: Santa Rosa, Estrada da Vigia, 
Para, Brasil. Distribution: easternmost Para and 
adjacent Maranhao, Brasil. 
QO. occipitalis (Wagler). Revalidated by Hoge et al., 1973, 
Mem. Inst. Butant¢an ‘(197 2°} 362221-32.. 
O. trigeminus D., B. & D. Distribution: also Paraguay 
(Bailey, 1939). 
1978 O. trigeminus guibei Hoge & Romano, Mem. Inst. Butantan 
fiste7771 40/41:58. Type-locality: Brasil, Parana, 
Londrina. 
Paraptychophis Lema, 1967 = Ptychophis Gomes, 1915, fide Hoge & 
Romano, 1969, Cien. Cult.” 21:(2)%'45 3%. 
P. meyeri Lema = Ptychophis flavovirgatus Gomes, fide Hoge & 
Romano, 1969, Ibid. 21(2):453. 
Paroxyrhopus Schenkel, 1900 = Xenopholis W. Peters, 1869, fide Hoge 
& Federsoni, 1975, Mem. Inst. Butantan [1974] 38:137-46. 
P. reticulatus Schenskel = Xenopholis undulatus (Jensen), fide 
Hoge & Federsoni, 1975, Ibid. 38:137-46. 
P. undulatus (Jensen). Distribution: specimen from Amazonian 
Colombia is misidentified (Hoge & Federsoni, 1975, op. 
20 
