ROADSIDE LIFE. 



243 



and often with metallic blue or green ; sometimes 

 the yellow markings are more conspicuous than the 



black ground 

 color. The swal- 

 low-tails belong 

 to the family Pa- 

 PILIONID^ (Pa- 

 pii-i-on'i-dae). The 

 following well- 



known species will 

 serve as illustra- 

 tions : — 



The black swal- 

 low-tail, Papilio polyxenes {Pa-pW 

 i-o po-lyx'e-nes). — In the adult the 

 wings are black, crossed with 

 two rows of yellow spots, and 

 with marginal lunules of the 

 same color. The two rows of 

 spots are much more distinct in 

 the male than in the female. 

 The larva (Fig. 211) is the green 

 caterpillar, ringed with black 

 and spotted with yellow, that 

 eats the leaves of caraway. 



The tiger swallow-tail, Jas- 

 oniades glaucus {Jas-o-ni'a-des 

 glaii'ais). — This is the very com- 

 mon large swallowtail with yel- 

 low wings. On the fore wings 

 there are four black bars extending back from the 

 costa ; the inner one of these crosses the hind wings 

 also. In the South there are two forms of the fe- 



Vv '4 



Fig. 211. — Larva of the 

 black swallow-tail. 



