376 Zepidopte?'ological Contributions. 



primaries below costa. Body and corporal parts concolorous with 

 the wings. Female unknown. 



Expanse, $, 1.80 inch. Length of body, 0.75 inch. 



Habitat— Para (Brazil). Coll. Mrs. S. W. Bridgham. 



Subfam. CERATOCAMPIDAE. 



Tribe HEMILEUCINL 



Hemileuca, Walker. 



This name is proposed by Mr. Walker (Cat. Lep. Ilet. B. 

 M., Part 6, p. 1317, 1855), for a genus of which the Phalcena- 

 Bomhyx, Maia, of Drury, is the type. The Satarnia eglante- 

 rina, of Boisduval, is also included, but unauthoritatively so — 

 Mr. Walker being evidently autoptically unacquainted with 

 the Californian species. As we shall show, S. eglanterina 

 is generically distinct from Hemileuca maia, and is properly 

 made the type of a distinct genus. In 1861, Dr. Packard, in 

 his " Synopsis," proposes the generic name " Euchronia" for 

 Mr. Walker's Hemileuca maia, and uses the name "Hemi- 

 leuca" for the genus of which Saturnia eglanterina is typical. 

 Independent of the circumstances, that the new name is objec- 

 tionable from the fact that a very similar one (Euchromia) had 

 been previously used by Hiibner and Stephens in the Lepi- 

 doptera ; and, also, that the name proposed by Mr. Walker is 

 appropriately expressive of the habitual ornamentation of H. 

 maia ; there can be no propriety in transferring Mr. Walker's 

 generic name to a type with which he is not acquainted, 

 and with which the diagnosis of Hemileuca, Walk., does not 

 correspond. In this view of the case, the genus Euchronia 

 Pack'd, becomes synonymous with Hemileuca Walk., and our 

 species from the Atlantic District will rest as determined in 

 the British Museum lists. 



