THE SWALLOW-TAILS 



tips of the front wings are also extended. It is 

 as if summer in a pleasant mood had seized this 

 butterfly by the tips of each pair of wings and 

 stretched them out, making it larger and far 

 more gracefully proportioned than the forms 

 which came from the winter chrysalis. Though 

 it may be more beautiful in form, this later variety, 

 ajax ajax, has almost buried its purple crescents 

 in black and has but one drop of "blood" on the 

 upper surface of each hind wing. It seems to 

 have neglected its colors in order to produce tails 

 an inch long. 



The zebra swallow-tail is common in the south- 

 eastern United States. It flies low with much 

 fluttering and is found about low thickets. The 

 caterpillar is well protected by its scent organs, 

 which when protruded give off a sickish odor. 

 The winter is passed in the chrysalis stage. 



The Tiger Swallow-tail 

 Papilio glaums (Pa-pil'i-o glau'cus) 

 Plate VI, Fig. i, 2 

 In the adult state two distinct forms of this insect occur. 

 These differ so greatly in appearance that they were long con- 

 sidered distinct species. They may be distinguished as fol- 

 lows : 



(1) The Turnus Form, Papilio glaucus turnus (Plate VI, 

 pjg_ r y — The wings are bright straw-yellow above, and pale, 



