72 JOHN B. SMITH. 



the head only, while in others they exist in a regular row along the 

 entire larva, and in some cases are v'ery prominent and brilliant. 

 The metamorphosis takes place on the surface of the earth, the pupa 

 in some cases covered with a slight web. The pupa is enlarged to- 

 wards the head, and is generally provided with an annular case cov- 

 ering the proboscis which is not so large as in the preceding stirps. 

 In the imago the abdomen is long and acute, and the insects in many 

 cases have the habits of a vespertiUo. The typical genera are Dei- 

 lephila and CJutrocampa. The arrangement of genera is : 



Stirps I. — Omitted from the Catalogue. 



Stirps II. — Sesia, Sataspes Moore, Macroglossa, Lophura. 



Stirps III. — Smerinthus only. 



Stirps IV. — Leucophlebia, Basiana, Ambulyx, Calijmnia, Acheron- 

 tia, Sphinx, Macrosila, Zonilia. 



Stirj)S V. — Fanacra, Philampelm, Darapsa, Daphim, Pergesa, 

 Elibia, Deilephila, Chcerocainpa. 



Some of the genera enumerated are not represented in our fauna, 

 but enough of them are familiar to enable the student to appreciate 

 the arrangement according to larval structure, by which the Smer- 

 inihince are sandwiched in between two groups of typical Sphinginw. 



In 1859, Clemens, in the Jour. Ac. N. Sci. Phil., gives a synopsis 

 of the American Sphingidte. He first gives a very careful review 

 of some of the structural peculiarities of the family, speculating on 

 the use and development of several organs, and restricts the family 

 to the Legitivice Linn. 



In essentials he follows, while he elaborates and somewhat im- 

 proves on Walker, whose errors, however, are very generally copied. 



The ordei' of genera is as follows : Sesia, Macroglossa (for Lepisesia 

 and Allojnis), Proserpinus, Thyreiis, Deidamia, Enyo, Deilephila, 

 Darapsa, Chacrocampa, Philampelas, Pachylia, Macrosila, Sphinx, 

 Anceryx, Dolba., Ceratomia, Smerinthus, Darevihia, (Enosandra, 

 Lapara, Ellema and Arctonotus. 



In 1862, Morris, in his "Synopsis" published by the Smithsonian 

 Inst., follows Clemens. 



Since that time no monographic revision of all the American forms 

 has been attempted, while the monographs of Boisduval and Butler 

 hereinafter noted, both cover the Sphingidte of the world. 



In 1865, Mr. Grote gives some notes on the Sphingidte of Cuba, 

 following it by a list of species. The genera are not defined, and the 

 arrangement is closely that of Walker. In the same year, and in 



