24 BULLETIN 15 7, U. S. NATIONAL MUSEUM 



OCCUBEING IN WOODS WITH PINES, AND ADJACENT GRASS LANDS 



Cercyonis alope 



IK)UND IN AND NEAR WOODS WITH PINES 



Incisalia niphon 



POUND IN AND NEAR DAMP WOODS WITH SPHAGNUM AND VAOCINIUM 



Incisalia augustimis. I Incisalia henrici. 



OCCURRING IN SCRUBBY LAND AND GARDENS 



Incisalia irus 



OCCURRING IN BUSHY MEiADOWS AND VERY OPEN WOODS 



Lycaenopsis argiolus 



This classification of the local butterflies by types of habitat is in 

 certain cases only approximate. 



Most butterflies wander more or less, and stray individuals are 

 sometimes taken far from their normal territory. Woodland butter- 

 flies will travel long distances over open fields, usually flying high 

 in a perfectly straight line, and the butterflies of open country will 

 often deeply penetrate the woods along the roads. 



It is usually the case in butterflies having two or more broods 

 that the more numerous individuals of the later broods cover a 

 broader area than the relatively few individuals of the first brood. 

 Thus the least skipper {Ancyloxypha numitor) in spring is confined 

 to wet grassy regions in the immediate vicinity of small running 

 streams and is so sharply localized that it is quite likely to be over- 

 looked. The next brood covers a much increased territory, while in 

 the middle of September this little skipper is to be found, in greater 

 or lesser numbers, in all grassy regions and even in the city parks. 



In the same way the viceroy {Basilarchia archippus) early in 

 spring is confined to wet meadows with willow bushes or to hillsides 

 with a growth of small poplars, but in the middle of September it is 

 found throughout the open country, especially along roadsides. 



While in the spring the various swallowtails keep rather strictly 

 within their proper habitats, in September they are all to be found 

 covering much the same territory. This is not true, however, for the 

 zebra swallowtail {Papilio fnarcellus), which early in spring is far 

 more widely scattered than at any other time, and wholly disappears 

 toward the end of August. 



The painted lady {Pyramek cardui) when scarce and even when 

 rather common is found in the same habitat as the American 

 painted lady {P. virginiensis) , but when abundant it becomes fre- 

 quent in the woods and common about gardens in the city. 



