274 Mr. A. W. E. O'Shauglincssy on 



A. ct/hotcf!, Cope, Proc. Acad, riiilad. 1862, p. 177 ; Proc. Am. 

 ' Phil. Soc. 1869, p. 164. 



.4. lihWi, lleinh. & Liitk. /. c. p. 204. 

 Specimens (male ami female) from San Domingo. 



A. fjibbiccjjs, Cope, Proc. Acad. Philad. 1864, p. 174. 

 The type (female) from Caracas. 



A. citrincllus, Cope, Proc. Acad. Pliilad. 1864, p. 170. 

 The type from San Domingo. 



A. damtilus, Cope, Proc. Acad. Philad, 1864, p. 169. 

 The type presented by Dr. Glinthcr. 



A. insigniSj Cope, /. o. 1871, p. 213. 



A fine specimen, brought from Costa Rica by Mr. Salvin, 

 agrees with Mr. Cope's recent description of this well-marked 

 species. 



A. Boiivieri, Bocourt, Miss. Sc. Mex. iii. p. 58, ])1. xiv. fig. 8. 



Three specimens from Pebas and Guayaquil. The tail, 

 perfect, is compressed and has the upper edge serrated, as 

 described by M. Bocourt. 



A. transversalisj Dum. Cat. Kept. p. 57 ; Arch, du Mus. viii. 

 p. 515, pi. xix. fig. 3 ; Guichen. in Castcln. Amdr. du 

 S., Kept. p. 17. 

 A. impetigosus, Cope, Proc. Acad. Philad. 1864, p. 174. 

 Mr. Cope's type, of which the habitat is unknown, being in 

 the collection, I am able to refer it to the above species, de- 

 scribed by Dumdril. 



A. heterodermnSj Dum. I. c. p. 59, and J. c. p. 516, pi. xix. 

 fig. 4. 



Adult and half-grown specimens from Bogota enable mc 

 to add this other remarkable species, described by Dumdril, 

 to the list. 



B. Ventral scales keeled. 



A. {Dactyloa) biporcatus,'Wiegm. Herj3. Mex. p. 47 ; Bocourt, 

 Miss. Sc. Mex. p. 98, pi. xv. fig. 8. 

 A. {Draconura) viftii/enis, Cope, Proc. Acad. Philad. 1802, p. 170. 

 A single specimen from llio Polochic, Guatemala, presented 



