HOP-VINE HYPENA DESCRIPTION OF. 325 



ment. It gradually changes to a mahogany brown and finally to 

 a black color. The pupa state, in the middle of summer, lasts 

 about twelve days. 



• The moths which come from these worms belong to the Family 

 Pykalim: of the Order Lepidoptera, and to the genus Hypena, 

 which is characterised by the length and form of its feelers, one 

 of which, highly magnified, is represented, plate 1, fig. 1 b. 

 They are quite long, and project horizontally forwards in front 

 of the head, resembling, when pressed together as they usually 

 are, a beak or proboscis, from which circumstance the species of 

 this genus have derived their common name, snout-moths. 

 These moths are extremely variable, being sometimes much 

 darker colored, and the markings and scales upon their wings 

 are peculiarly liable to be more or less obliterated from frequent 

 contact with the rough scabrous leaves of the hop. This ren- 

 ders it difficult to determine whether the hop-vine snout-moths 

 of this country are a distinct species from those of Europe, 

 which are similarly variable. Dr. Harris has treated of our in- 

 sect " upon the supposition that it is distinct," though he alludes 

 to no marks which indicate it to be different; and the full de- 

 scriptions of the European moth given by writers coincide quite 

 accurately with our insect. Mr. Westwood notices the singular 

 fact that some of these moths come from their chrysalids in win- 

 ter, about the period of Christmas, and that all these individuals 

 are the most dark colored and sooty, with their marks the most 

 obscured of any belonging to their race. And on last Christmas 

 eve captured a moth flying about my room which was found to be 

 one of these black obscure individuals of this species. From 

 whence it could have come at that inclement period of the year 

 was a mystery. Thus all the circumstances indicate that this is 

 a species which has been introduced upon this side of the At- 

 lantic among hop plants brought here from Europe. But until 

 I am able to verify this fact more fully, by comparing our insect 

 with European specimens, I refrain from making any alteration 

 in the record as it now stands. 



The hop-vine snout-moth or hop-tine Hypen.y (plate 1, fig. 1), measures 

 about an inch and a quarter across its wings when extended. It is very variable. 

 The most perfect specimens are of a dull brown color with a black stripe on the 

 middle of the thorax; fore wings with a large rhombic darker spot on the middle 



