258 



PSEUSTES 



Pseustes poec i lonotus poec i lonotus ( Gun t her) 



1861 Tropidodipsas lunulata Cope. Proc. Acad. Nat. Sci. Phila., 1860: 517. Type-locality: 



Honduras. 

 1529 Phrynonax poecilonotus poeci lonotus— Amaral , Mem. Inst. Butantan, 4: 311> ^ "S- 2. 

 1537 Pseustes [ poeci lonotus poec i lonotus j — Brongersma, Zool. Meded., 20: 6. 



Distribution: Yucatan, Mexico through El Peten, Guatemala and British Honduras to Honduras. 



Pseustes poec i lonotus arqus (Bocourt) 



1888 Spilotes argus Bocourt. Miss. Sci. Mex., Rept.: 652, pi. 48, figs. 10-lOf. Type-locality: 



Mex ico. 

 18^4 Phrynonax quentheri Boulenger, Cat. Sn. Brit. Mus., 2: 20. Type-locality: Atoyac, 



Veracruz, Mexico. 

 1529 Phrynonax poecilonotus arqus — Amaral, Mem. Inst. Butantan, 4: 313> fig. 3' 

 1937 Pseustes [_ poec i lonotus arqus J — Brongersma, Zool. Meded., 20: 6. 



Distribution: San Luis Potosi, Mexico, south on Atlantic slopes to El Peten, Guatemala; 

 also on Pacific slope in region of Isthmus of Tehuantepec, Mexico, 



Pseustes poec i lonotus chrysobronchus (Cope) 



I876 Spilotes chrysobronchus Cope, Jour. Acad. Nat. Sci. Phila., (2) 8 (I875): I36, pi. 28, 

 figs, lla-b. 



1893 Synchal i nus corall i i des Cope, Proc. Amer. Phil. Soc, 31= 3*5- Type-locality: Buenos 



Aires, Costa Rica. 

 1929 Phrynonax poec i lonotus chrysobronchus— Amaral , Mem. Inst. Butantan, 4: 315' 

 1937 Pseustes I poec i lonotus chrysobronchus j — Brongersma, Zool. Meded, 20: 6. 



Distribution: Costa Rica and Nicaragua. 



Pseustes poec i lonotus polylep i s (Peters) 



I867 Ahaetulla polylepis Peters, Monats. Akad. Wiss. Berlin, 1867: 709- Type-locality: 



Sur i nam. 

 I869 Spilotes fasciatus Peters. Monats. Akad. Wiss. Berlin, I869: 443. Type-locality: 



Maroni, Surinam; Amaral, Mem. Inst. Butantan, 4, I929 (193O), 3O2, suggests that this 



locality is in French Guiana. 



1894 Phrynonax eu trop i s Boulenger, Cat. Sn. Brit. Mus., 2: 22, pi. 1, fig. 1. Type-locality: 



Unknown. 

 1901 Phrynonax lyon i Stejneger, Proc. U.S. Nat. Mus., 24: I85. Type-locality: Macuto, 



Venezuela. 

 1913 Phrynonax atr i ceps Werner, Mitt. Naturhist. Mus. Hamburg, 3'^: 22. Type-locality: None 



g i ven. 

 1929 Phrynonax poecilonotus polylepi s — Amaral, Mem. Inst. Butantan, 4: 313. 

 1937 Pseustes [ poec i lonotus polylep is j — Brongersma, Zool. Meded., 20: 6. 



Distribution: Amazonian region of Brazil, Ecuador, Peru, and Bolivia; also from 

 Venezuela, Trinidad and Guianas. 



PSEUSTES SEXCARINATUS (Wagler) 



1824 Natrix sexcar i natus Waqler. in Spix, Sp. Nov. Serp. Brasil; 35' Type-locality: RioAmazonas, 



Braz i 1. 

 1964 Pseustes sexcar i natus — Hoqe. Mem. Inst. Butantan, 3O (196O-62): 28, 2 figs. 



Distribution: Estado do Para, Brazil; Misiones, Argentina, 



Comment: The specimen described by Hoge, loc. cit., is very similar to specimens of poec i lonotus 

 as described by Amaral, Mem. Inst. Butantan, 4, I929, 3^8, and we are not sure our key will 

 suffice to distinguish the two taxa. 



