1898.] ENTOMOLOGICAL NEWS. 135 



My attention was drawn to the above synonymy by Mons. C. 

 Oberthiir, who compared Boisduval's type with the excellent 

 figure in the Biologia. 



Theretra neoptolemns. 



Sphinx tieoptolemus Cr., Pap. Exot. iv, t. 301, fig. F, 1780. 

 Cheer, irilineata Walk., Cat. Lep. Het. B. M. xxxi, p. 30, 1864. 



I can see no reason for separating Walker's species from T. 

 tieoptolemus. 



Theretra isaon. 



Cheer isaon Bdv., Sp. Gen. Het. i, p. 272, 1875. 

 Theretra olivacea Roths., Nov. Zool. i, p. 77, 1894. 



My specimens of T. isaon, compared with type of Boisduval, 

 agree with the description of T. olivacea. 



Theretra pistacina. 



Philampelus pistachio, Bdv., Sp. Gen. Het. i, p. 199, 1875. 

 Cheer, jocasta Druce, Ann. Nat. Hist. (6), ii, p. 237, 1888. 

 Of the above species I have a specimen compared with both 

 types. 



Theretra aglaor. 



C. aglaor Bdv., Sp. Gen. Het. i, p. 275, 1875. 



C. libya Druce, Ent. Month. Mag. xiv, p. 249, 1878. 



C. Icz/ia Druce, Ent. Month. Mag. xiv, p. 249, 1878. 



C. libya is certainly the same as C. aglaor, and in the B. M. 

 collection the specimen labeled as C. Icelia by Mr. Druce is in- 

 separable from the specimen which he has labeled as C. libya. 



Theretra arpi sp. nov. 



Head and thorax olive-brown; a white line in front of the antennae; 

 patagiae laterally streaked with white; a reddish brown spot on collar, a 

 similar spot on patagiae and some reddish brown shades posteriorly on 

 thorax. Abdomen olive-green above, grayish below. Primaries light 

 gray, heavily shaded with olive-green in the disc, and otherwise covered 

 with greenish striae; an antemedial, geminate, dark green curved line not 

 reaching the inner margin; a minute black point in the cell; three post- 

 medial dark lunulate lines, followed by a row of points on the veins; an 

 olive-green apical spot and a subterminal cluster of dark scales between 

 5 and 6. Secondaries dark brown; the costal margin, the apical portion 

 of the fringe, the inner margin narrowly, and a broad subterminal shade 

 at the anal angle, yellowish; the subterminal shade somewhat suffused 

 with olive-green. Exp. 66 mm. 



Hab. — Rio Janeiro. 



