THE CANADIAN ENTOMOLOGIST. 217 



best only the faintest indication. In Diffinis the spot is distinct and the 

 inner edge is very slightly uneven. In Marginalis the inner edge is regu- 

 larly dentate on the interspaces. In Axillaris the dentations are irregu- 

 lar, some very deep and long, while the red spot has become almost a 

 band, extending over the inferior interspaces. In Haetnorrhagia the body 

 proportions are slightly modified and the band is all claret red. In Thy she 

 the inner edge of the band is dentate. In Uniforynis it is even. I have 

 described and figured both sexes of Buffaloensis, a smaller form agreeing 

 with Ujiiformis by the evenness of the band, while the cell is so filled in 

 as to obscure the bar inferiorly. Now if Buffaloensis is only a starved or 

 small Ujiiformis, why do we not find starved or small Thysbe with the 

 band dentate ? Similarly if Floridensis is a stuffed or large Ujiifor?nis, 

 why is the shape of the band itself modified ? Clearly we do not as yet 

 know everything about these insects. We must experiment and breed 

 them, without prejudice or desire to make more or less species than there 

 really are. Mr. Lintner has, I believe, described the larva of Buffaloensis. 

 We must not expect very great differences in the larva of these forms, 

 but if they differ from each other and breed true, then they are good 

 species. Mr. Hulst says Thysbe does not breed true, but occasionally 

 produces Uniformis, and this we must accordingly accept. But it is not 

 shown that Buffdloensis or Tloridefisis are so produced, or that Mr. Hulst 

 knows these forms. I would recommend him to read and study our 

 original papers and figures, which, of Buffaloensis, are very excellent, but, 

 if I recollect, right, the artist made a mistake in color in the abdomen of 

 Floridensis.) Our next genus to Hemaris falls into our third category. 

 The species of Aellopos are of South American origin. Our next Eastern 

 genus, Lepisesia, is probably of North American origin and falls into the 

 second category, but as to this I need further studies of the allied Euro- 

 pean Pterogon CEfiothercz. But the following genera are decidedly North 

 American in their origin, Amphion, Thyreus and Deidamia, while Ejiyo 

 is again South American. The two Californian genera, Euproserpi?ius 

 and Arctonotus, are, the first allied to the European Macroglosstim Stella- 

 tarttm, while the second is sui generis and decidedly American. There 

 remains, in this sub-family, the genus Cautethia to examine. This is un- 

 doubtedly South or Central American in its origin. The moth Cautethia 

 Grotei is found in Florida and also in Cuba ; thus it is a member of the 

 Florida colony of which I have spoken, while the two other species, Noc- 



