80 BUTTERFLIES 



and along the southern boundaries. Some of these occa- 

 sionally migrate east or north so that they are collected in 

 the Central states. Thus Papilio daunus, P. oregonia, 

 and P. zolicoan are aU found in the "List of Nebraska 

 Butterflies," published by Mr. H. G. Barber, and the same 

 species have been taken in other states in or near the 

 Mississippi Valley. These and various others are described 

 and pictured in Dr. Holland's excellent "Butterfly Book." 



Synopsis of the Swallowtails 



Tiger Swallowtail: Yellow form {Papilio glaucus turnus) . 

 Expanse 3| to 5 inches. Upper surface of wings bright 

 yellow with each black margin marked with a row of yellow 

 spots. Both sexes throughout its range. Black form 

 {Papilio glaucus glaucus) . Black all over with blue mark- 

 ings on outer half of hind wings and row of straw-yellow 

 crescents on borders of same. Females only, and only 

 south of about latitude 40 degTces. 



Giant Swallowtail {Papilio thoas or Papilio cresphontes) . 

 Expanse 4 to 5| inches. Upper surface black with two 

 bands of yellow starting at the inner margin of the hind 

 wings and coming together as a row of yellow spots at the 

 outer angles of each front wing. A yellow spot on each 

 black tail. Under surface yellow. 



Zehra Swallowtail. Expanse 3 to 3| inches. Easily 

 known by the stripes of green upon black and the long, 

 slender tails. The different forms vary in size and in the 

 length of the tails. Scientific names are: Early Spring 

 Form, Iphiclides ajax marcellus; Late Spring Form, 7. 

 ajax telamonides; Summer Form, I. ajax ajax. 



Green-clouded Swallowtail {Papilio troilus). Expanse 

 3j to 4 inches. Black with about seven yellowish spots 



