786 



AN INTRODUCTION TO ENTOMOLOGY 



This species occurs throughout the greater part of the United 

 States, and is distributed far beyond our borders. It is beHeved, 

 however, that the species dies out each year in a large part pf the 

 Northern States, and that those butterflies which appear first in this 



Fig. 976. — Danaus 



Fig- 975.— Danaus archippus, larva. (From Riley.) archippus, chrys- 



alis. (From Ri- 

 ley.) 



region, in June or July, have flown hither from the South, where they 

 hibernate in the adult state. In the extreme South they fly all winter. 

 Great swarms, including many thousands of individuals of this 

 species, are sometimes seen, late in the year; and these swarms appear 

 to be migrating southward. 



The queen, Danaus herenice. — This species is found in the Southern 

 States. The upper surface of the wings is reddish chocolate-brown 

 with the costal margin of the front wings and the outer margins of 

 both pairs bordered with black. There are two partial rows of white 

 dots near the costal and outer margins of the front wings ; and there 

 is a larger white spot in each of the cells R5 to Cu. The male possesses 

 a black pouch containing androconia next to vein Cu of the hind wings 

 as in the preceding species. The wings expand from 60 to 88 mm. 



There is a well-marked vsxiety, Danaus berenice strigosa, in which 

 on the upper surface of the hind wings the veins are narrowly edged 

 with grayish white. 



The larva of this species feeds on milkweed. This larv^a bears 

 three pairs of long, brown, whiplash filaments ; these are on the second 

 thoracic and the second and eighth abdominal segments. 



Subfamily LIBYTHEIN^ 



The Long-beaks 



The long-beaks can be easily recog- 

 nized by their excessively long, beak- 

 like palpi, which are from one-fourth 

 to one-half as long as the body and pro- 

 ject straight forward (Fig. 977). The 

 outer margin of the fore wings is deeply 

 notched ; the males have only four well- 

 developed legs, while the females have six. 



Fig. 977. — Hypatus bachmanni. 



