170 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



Trosia punctigera Stoll. 



Phaleena bombyx punctigera Stoll, Suppl. Cramer's Pap. Exot., 



pi. 34, 1790. 

 Sciathos punctigera Walker, Cat. Lep. Het. Brit. Mus., iii, 752, 



1855. 

 Sciathos punctigera Druce, Biol. Cent. -Am., Lep. Het., i, 212, 



1887. 

 Sciathos punctigera Kirby, Cat. Lep. Het., 540, 1892. 



Druce gives Isochroma fallax Felder as a synonyn of this 

 species, but Felder figures the fore wings and thorax of a blue 

 gray, too highly colored, but clearly different from punctigera. 

 Kirby adds Bombyx tricolora as a synonym, but this is the 

 small white species, as Fabricius plainly describes. Kirby 

 has, through the similarity of names, confounded punctigera 

 of Stoll with punctigera of Linnaeus. The latter is "Phal- 

 aeua Noctua" and has a spiral tongue, evidently of an entirely 

 different family. Moreover, it is described from the Indies. 



Specimens from Brazil, the Guianas, and Central America 

 are large and fully colored. Those from Mexico are smaller 

 and have more or less white on the discal area of the hind 

 wings both above and below. For the latter I propose the 

 varietal name amala. 



Type locality: Cordoba, Mexico. 



Type- No. 13547, U. S. National Museum. 



Trosia fallax Felder. 



Isochroma fallax Felder, Reise Novara, pi. 83, ff. 18, 19, 1874. 



In this species there is no white on the fore wings, the rosy 

 shading covering the surface except for its gray outer margin 

 and red costa. The gray margin shows plainly on the fore 

 wings beneath, which are red \\\ punctigera. Mr. Schaus has 

 sent two males from Costa Rica and I have a female from 

 Panama. (C. L. Pollard). 



Trosia dimas Cramer. 



Phalsena bombyx dimas Cramer, Pap. Exot., pi. lix, fig. c, 1775. 

 Bombyx tricolora Fabricius, Mant. Ins., ii, 114, 1787. 

 Trosia dimas Hiibner, Verz. bek. Schmett., 196, 1816. 

 Chrysauge dimas Walker, Cat. Lep. Het. Brit. Mus., ii, 375, 



1854. 



Idalus dimas Kirby, Cat. Lep. Het., 198, 1892. 

 Sciathos dimas Druce, Biol. Cent.-Am., Lep. Het., ii, 440, 1897. 



There is no doubt that this is the species described by 

 Fabricius, the type locality being French Guiana. Cramer's 



