380 Lepidopterologieal Contributions. 



respectively the Bombyx regalia and Bombyx impsrialis of 

 Fabricius. In 1855, Mr. Walker confounds the two genera in 

 the British Museum Lists, Lep. Part VI., pp. 1370-1376. 

 Eaeles imperialis, Drury, sp., is properly cited there by Mr. 

 Walker, but Citheronia regalia, Fabr. sp., is described errone- 

 ously as Eaeles Laocoon, Cram. sp. Cramer's Phalcena Bom- 

 byx Laocoon, Exot. Vol. II., Plate 117, Figs. A-C, is cited as 

 illustrating our Northern species; but a comparison of speci- 

 mens with the Plate shows, that Cramer's is a distinct species, 

 though likewise belonging to the genus Citheronia. An enu- 

 meration of the many distinguishing features is unnecessary, 

 the more so as, in the description which is here given of a new 

 Mexican species of the genus, the habitual characters of the 

 species are fully discussed. To continue, no reference is made 

 by Mr. Walker to Drury 's figure in the Exotic Entomology, 

 Vol. III., Plate 3, Fig. 1, given in illustration of Cramer's 

 species, Phal. Laocoon, as appeal's in the Index, though in the 

 description (p. 4), Drury states it to be a new or nondescript 

 species. This determination is, however, manifestly incorrect. 

 On the contrary, Drury's figure well represents Phal. Pho- 

 ronea, Cramer, p. 77, Plate 231), Fig. A-C, except that it is 

 brighter colored, and in that there is an aggregation of light- 

 colored scales on the thorax above, while; as usual, Drury's 

 figure is far better executed than that of the Dutch Entomolo- 

 gist. But in the ornamentation, the shape of the wings, the 

 general coloration and size, and more especially in the pecu- 

 liarly sinuate costal edge of the primaries, the two figures are 

 identical. Mr. Walker describes the species under the name 

 of Eaeles Phoronea, from specimens received from the Brazils. 

 Dr. A. S. Packard, Jr., in his Synopsis <>f the Bombycidae of 

 the United States, has given a correct synonymy of our North- 

 ern Citheronia regalis, Ilubner, to which, however, may be 

 added the citation of Stoll's Phal. Laocoon, which (nee. Phal. 

 Laocoon, Cramer), alone of any of the earlier figures under 

 this name, represents Citheronia regalis. The following, then, 



