20 BULLETIN UNIVERSITY OP MONTANA. 



THE DAUNUS BUTTERFLY OR SWALLOWTAIL. 

 Papilio daunus, Boisduval, Fig. 17. 



Fig. 17, Papilio daunus. 



butterfly Expanse 4.00-5.25 inches. Upper surface of wings clear 

 yellow, costa and outer border of fore wings and posterior border of hind 

 wings black. The black along the costa is suffused with yellow, eight 

 spots in the fore and four lunules in the hind wings. The lunule on the 

 hind wings is orange color. There are four black bands on the fore 

 wings. The first is continued two-thirds across the hind wings and is 

 about one-fourth the distance from the base to the outer margin. The 

 second extends from the costa to a little beyond the median vein; the 

 third extends from the costa across the discal cell; the fourth from the 

 costal to the fifth sub-costal venule. The black terminal border of the 

 hind wings contains blue clouds. It has two tails which are black, edged 

 on the inside with yellow. The under side is similar to the upper. The 

 body is black with yellow stripes on each side. 



It is the largest of our butterflies, very conspicuous when on the 

 wing, and eagerly sought by the young entomologist. It is apparently 

 absent from the treeless eastern end of the state. 



Food The early stages have not been thoroughly studied, but it is 



