192 NORTH AMERICAN INSECTS. 



Germany on the potato-vine; and in France, Egypt, and 

 Asia, on the thorn-apple (Datura stramonium). 



There are several species of hawk-moth caterpillars found 

 upon our garden and forest trees, on grape-vines and other 

 shrubs, which are quite injurious to vegetation, but which 

 can be easily seen on account of their large size, and de- 

 stroyed without much trouble, or they may be secured in 

 boxes for the purpose of raising their beautiful moths. One 

 of these injurious insects is the caterpillar of 



The FOUR-HORNED SPHINX ( Ceratomia quadricornis), Fig. 



45, which is generally 

 found, in the month of 

 July, upon our lime, 

 poplar, and especially 

 elin-trees, which are 

 frequently stripped en- 

 tirely of their foliage 

 by its ravages. The 

 beauty of this caterpil- 

 lar universally attracts 

 attention, its body be- 

 ing of a light-green 

 color, with oblique 

 white lines upon each 

 side, and ornamented 

 with four notched, 

 short horns on the 

 shoulders. When full 

 grown it is about three 

 inches long. It soon 

 enters the ground, 

 changes into a chrys- 

 alis, and makes its ap- 

 pearance as a perfect 

 hawk-moth during the 



