174 



tively striking- and isolated forms. We may tabulate them as fol- 

 lows : 



Genera of European and Asiatic Extraction. 



No. Species. 



Hemaris (typical) lo 



Deilephila 2 



AMPELOPHAGA I 



Smerinthus (typical) I 



EUSMERINTHUS 2 



Triptogon 2 



Sphinx 15 



Hyloicus 3 



Total 36 



This number loses its importance when we examine the 

 species themselves. The forms of typical Hemaris are probably 

 a little overstated. The development of Sphinx is American, 

 rather than European. In Europe but one species, Ligustri, oc- 

 curs. Our forms on my list, down to Canadensis, seven in num- 

 ber, are probably strictly typical ; the remaining eight depart 

 more or less, some approaching Hyloicus, however, a European 

 type. Again, others are peculiarly American in appearance, but 

 hardly give generic characters, such as Gordius, Eremitus, Dollii. 

 On the whole, then, we have eight generic types coming from 

 the Old World, the kinds of two of them, Hemaris and Sphinx, 

 having multiplied and developed upon American ground. These 

 types may be held as coming from the North, and as related to a 

 former Circumpolar fauna. 



Genera of Southern American Extraction. 



Names of Genera. No. Species. 



Aellopos 2 



Cautethia I 



Amphion I 



En Yo 2 



Philampelus 4. 



Argeus I 



Pachylia I 



Chcerocampa I 



D AREMM A . 3 



DiLUDIA 3 



Amphonyx 1 



Phlegethontius 4 



DiLOPHONOTA 6 



Total ^o 



We have thus thirteen generic types from the South, and al- 

 though the species are less numerous than in the genera of Old 

 World extraction, I have explained this circumstance away. 



