188 [November 



" Sainmlung Exot. Sehm.," will be retained and the species be known 

 as Macrosila celeus. We note Dr. Fitch's remarks in his Ninth 

 Report, p. 212, where the date, 1S02, is given for Haworth's descrip- 

 tion of this species, but no citation is given of any work to authenticate 

 this reference. The critical remarks, intended to show that Dr. Harris 

 committed an error in his " Catalogue of North American Sphinges," 

 in describing the present species as S. Carolina, are destitute of value, 

 when we consider the brevity of Dr. Harris' description, the fact that 

 both species occur in Massachusetts, and that they are properly sepa- 

 rated in the " Insects Injurious to Vegetation." 



DILTJDIA, nov. gen. 



The genera Cocytiiis, Phlcrjetliontiuii and Agrius, erected by Htibuer 

 in his '"Verzeichniss," appear to us untenable, for the reason that they 

 contain dissonant material, while the species ai"e quite confusedly 

 arranged, showing that Hiibner was very probably autoptipally unac- 

 quainted with the species to a greater or less extent. We erect the 

 present genus for certain robust American Sphingidae which seem pro- 

 perly associated with neither Macrosila or Sphinx, and have been 

 ah'eady superficially characterized by Mr. Grote as cinereous, roughly 

 haired species of " Sphinx." The type is Sphinx Brontes Drury, 

 (H-S., Grrote) while other species will probably be found to be properly 

 referred here as Sphinx leucophseata Clem., and S. Jasminearum Boisd., 

 with which we are autoptically unacquainted. 



The head is large and salient; prothoracic parts well advanced before 

 the insertion of the primaries. Wings ample; external margin nearly 

 straight, not rounded; internal angle produced. Posterior wings with 

 the external margin rather straight, excavate before anal angle. Ab- 

 domen long and stout; legs provided with stout spurs. The squamma- 

 tion is rough and cinereous, while the posterior wings are usually more 

 or less suiFused with darker shades and crossed by narrow black bands. 



From Macrosila, the species differ by the straighter external margin 

 of the primaries and by the exserted internal angle, in these characters 

 resembling Amphonj/x, while the normal palpal conformation, with a 

 number of other characters, amply separate them from Prof. Poey's 

 genus. We do not give further characters here, of a genus which we 

 are satisfied should be erected, since we have insufficient material upon 

 which to amplify from needed dissections. 



Diludia brontes. 



We refer to Mr. Grote's paper for the particulars of the synonymy of 

 this species, lately discovered in the AVest Indies, and which conforms, 



