194 THE ENTOMOLOGIST. 



Letis occidua. 

 Phalcena occidua, Linneus, Syst. Nat. p. 812, n. 14. 

 P. marmorides, Cramer, Pap. Exot. i. p. 25, pi. xvi. figs, e, f 



(1779). 

 P. corisandra, Cramer, I. c, iv. p. 189, pi. ccclxxxiv. figs, a, b 



(1782). 

 <? , 5 . Amazons. In Coll. B. M. 



Letis magna. 



Phalcena magna, Gmelin, Syst. Nat. p. 2544, n. 1448 (1789). 



Letis fusa, Guenee, Noct. iii. p. 151, n. 1537 (1852). 



L. aptissima, Walker, Lep. Het. xiv. p. 1272, n. 21 (1857). 



L. abrupta, Walker, I. c., n. 22 (1857). 



Trinidad, Venezuela, Amazons. In Coll. B. M. 



This species is nearly allied to the following, which, however, 

 is less grey in colouring, and differs somewhat in the pattern of 

 the under surface. 



Letis mycerina. 



? Phalcena mycerina, Cramer, Pap. Exot. ii. p. 115, pi. clxxii. 

 fig. B. 



Letis nycteis, Guenee, Noct. iii. p. 150, n. 1536 (1852). 



L. atricolor, Guenee, I. c, p. 151, n. 1538 (1852). 



Para and St. Domingo. In Coll. B. M. 



Walker wrongly identified Guenee's species, the true L. atri- 

 color being evidently Walker's L. nycteis, plus one or two 

 specimens inseparable from his L. mycerina. The female figured 

 by Cramer has the upper surface of the var. atricolor, and the 

 under surface of Walker's L. nycteis, ? . The L. atricolor of 

 Guenee represents the darkest and most uniform type of the 

 species ; and L. nycteis the form with the costal half and 

 external border of the primaries paler, or (as Guenee expresses 

 it) " ailes d'un brun-fauve," ** ligne coudee . . . suivie d'une large 

 bande d'un brun fonce que borde la subterminale " ; or possibly 

 his specimens were intermediate between Walker's L. atricolor 

 and his own. 



Erebus, Latr. 

 Erebus odoratus. 



Phalcena odorata, Linneus, Syst. Nat. 10th ed. p. 505, n. 43 

 (1757). 



P. odora (part), Linneus, Mus. Lud. Ulr. p. 374, n. 9 (1764). 



Jamaica. In Coll. B. M. 



In his original diagnosis, Linneus named the insect P. odorata, 

 and quoted Sloan's Jamaica only for a figure of bis species. The 

 Jamaica form, therefore, characterized by the bright purple shot 

 of its upper surface and the red legs below, becomes typical 

 Erebus odoratus ; and the form described in full in the Museum 



