1 



192 [November 



cated in certain instances, viz: Perigonia and Chocrocampa^ the exist- 

 ence of groups and species, which seem to make critical dissectional 

 studies and comparisons necessary to decide whether these do not, in 

 fact, afford distinct generic types. Since Mr. Walker compiled the 

 synonymy of the North American Sphingidae in 1856, no work has 

 appeared to our knowledge, on either side of the Atlantic, which has 

 entered into the synonymy to any original extent, and while we trust 

 that in the present Paper we have improved upon the arduous labors 

 of the English Entomologist, there undoubtedly remain certain points 

 to be elucidated and, perhaps, some citations to be added. The severer 

 study of the monographist will find in the North American represen- 

 tatives of this interesting Family, a profitable and, as yet, an unhar- 

 vested field. 



The following species we regard as doubtful, for the several reasons 

 appended to the citations: 



" Man'oglossa Thetis, Boisd., Ann. Soc. Ent. Fr. 3iem. Ser." 



This citation, given by Dr. Clemens without further reference to the 

 species, is all that we know, of what is probably a Californian species, 

 hitherto uudescribed. It is improbable that it belongs to the genus 

 3Iacroglossa, since, properly speaking, this has not hitherto occurred 

 in North America. Bearing in mind the vague sense in which this 

 generic term has been used by Dr. Boisduval, it is profitless to hazard 

 any conjecture in this respect. 



"Sphin.r Japix, Cramer, Exot. Vol. 1, p. 137, pi. 87, fig. C." 



This species has not been discovered since Cramer wrote. The local- 

 ity given by Cramer of New York, is probably incorrect, unless the 

 gross figure disguises one of our familiar species. 



"Perigonia undata, Walker, C. B. M. Lep. Ft. 8, p. 103." 



This species is erected upon a fragmentary specimen (abdomen and 

 hind wings wanting) in the British Museum, received from Jamaica. 

 " Deilephila oxybaphi, Clemens, 1. c. p. 145." 



This species is described from a larva feeding upon the exotic plant 

 " Oxi/haplius vi/ctagencuay Under the circumstances it seems impro- 

 per to include the name in the present Catalogue, since the species can- 

 not be said to be fairly established. 



"Sphinx rhiron, Drury, Exot. Vol. 1, p. 5fi, pi. 26, fig. 3." 



The specimens described as " Chserocampa chtron'' by Mr. Walker 

 in the C. B. M., seem to belong to the species figured very acceptably 

 by Cramer under the specific name of JVechns, and to which latter figure, 

 Cuban specimens, examined by us, accurately correspond. Drury's 

 figure differs in the color of the body and in the shape and coloration of 



