NORTH AMERICAN LEPIDOPTERA. 69 



by him. No reasons are given for the sequence, and only two 

 large divisions are adopted : the 1st, broad winged, without anal 

 tufts containing all the genera save Pterogon and Macroglosm, which 

 form group 2, distinguished by narrow wings and tufted anal seg- 

 ment. 



Bearing date 1857, Walker, in the eighth volume of the " British 

 Museum Catalogue of Lepidoptera," gives a monograph of the 

 Sphingidfe of the world. This is really the first attempt at a com- 

 plete monograph, and a mine of information concerning the literature 

 of the family, whatever may be said of the work in other respects. 



The term Sphingiike is used to include the Seske, and the whole 

 series is divided into two tribes, viz. : Sesii and Sphingii. The Sesii 

 •contain two families : Stygiidce and ^Egeriidxe, the latter family in- 

 cluding the genera Thyretes, Thyris and Amu, usually separated as 

 a distinct family. 



The Sphingii are included in one family, SphiiigUke, and the best 

 way to give an idea of the chissification adopted is to rej)roduce the 

 Synopsis of Genera, premising that the translation (from the Latin) 

 is a free one, and that generic synonyms are omitted here. 



Abdomen tufted at apex. 



Anterior wings with the outer margin entire. 



Wings hyaline Sesia. 



Wings opaque, with scaly clothing Iflacroglossa. 



Anterior wings with the outer margin excised. 

 Thorax not crested. 



Antennse clavate I'roserpiuiis. 



AntenniE not clavate. 



Primaries without silvery spots. 



Head not conic Thy reus. 



Head conic. 



Primaries with outer margin hardly excised. 



Wings with outer margin hardly dentate Perigoiiia. 



Wings with outer margin moderately dentate Teiiiiiora. 



Primaries with outer margin moderately excised EiOpliura. 



Primaries with silvered spots C/allioinina. 



Thorax crested Euyo. 



Abdomen untufted at apex. 

 Wings very long. 



Abdomen slender, gracile Ambiilyx. 



Abdomen stout, thick Calyinuia. 



Wings not very long. 



Tongue long, or very long. 



Abdomen long, or moderately long. 



Abdomen with silvery spots Basiothia. 



Abdomen with silvery, golden, or pallid stripes. 



