Z NORTH AMERICAN BUTTERFLIES. 



moths possess a bristle-like expansion of the upper vein of 

 the hind wings, (Fig. 1, e) by which they are, in a measure, 

 caught to the front pair, a character never present in the 

 true butterflies. Again, most all butterflies undergo their 

 transformation from the larva to the perfect insect without 

 spinning any cocoons, like most other Lepidoptera, but 

 merely spin a button of silk to which they cling by little 

 hooks (Fig. 3). Lastly, butterflies are diurnal in habit, 

 moths, mainly nocturnal; that is, the first are active by 

 day and the latter by night. 



Fig. 3. 



Fig. 2. 



Fig. 4. 



Chrysalis of butterfly, 

 Agraulis vanillae. 



Butterfly with elevated wings, 

 Danais berenice. 



Cocoon of moth, 

 Attacua promethea. 



Family I. PAPILIONIDAE. Swallow Butterflies. 



Size, large or medium. Antennae, straight, with the club 



ROUNDED AND PROMINENT, NEVER HOOKED. EyES, PROMINENT AND ROUND, 

 NOT NOTCHED. CENTRAL CELL OF FORE WINGS CLOSED BY A STRONG VEIN 



(Plate 1, 1). Fore legs as complete as the two other pairs. ( Plate 

 I, 1, shows a butterfly having six perfectly developed feet, and Fig. 2, on 

 this page, one with only four. ) 



