402 LEPIDOPTERA. 



without previously making a cocoon. Unfortunately my 

 caterpillars died before the time for their transformation 

 arrived. The chrysalis is short and thick; obtuse behind, 

 but terminated by two minute points ; and the transverse 

 notched ridges or little teeth that are found on the chrysa- 

 lids of the other insects belonging to the same family, are 

 very small and hardly visible on this one. The insect re- 

 mains in the ground through the winter, and the moth comes 

 out in the following summer, during the month of June, 

 if I am rightly informed. I have not been able to obtain 

 one myself, and my description of the moth was made from 

 a very fine specimen belonging to a friend, who received it 

 from New Bedford. 



Between the regal Ceratocampa and the smaller insects of 

 this family belonging to the new genus Dryocampa should be 

 placed a noble moth, which partakes, in some respects, of 

 the characters of both ; its horned caterpillar, particularly 

 while young, when its horns are proportionally longer and 

 more formidable in appearance than afterwards, resembles 

 somewhat that of the Ceratocampa ; its chrysalis is exactly 

 like that of a Dryocampa, and like the latter also, in the 

 winged state, its feelers are minute, its hind wings project 

 beyond the front edges of the fore wings when at rest, and 

 its style of coloring is the same. In my Catalogue of the 

 Insects of Massachusetts, I placed this moth, the imperia- 

 lis of Drury, in the genus Ceratocampa, from which, how- 

 ever, it must be removed, on account of its very small 

 feelers, and the position of its wings ; and I now refer it, 

 with some hesitation, to the genus Dryocampa, with which 

 it agrees so well in the moth state, although its caterpillar 

 differs a good deal from those of the other insects of the 

 same genus. The imperial moth, Dryocampa imperialis 

 (Fig. 196), has wings of a fine yellow color, thickly sprin- 

 kled with purple-brown dots, with a large patch at the base, 

 a small round spot near the middle, and a wavy band to- 

 wards the hinder margin of each wing, of a light purple- 



