86 



female being confluent on the ventro-meson of the eighth and ninth 

 abdominal segments. Just caudad of the genital openings, at the 

 cephalic margin of the tenth abdominal segment is a small tubercle on 

 each side of the meson closely appressed to the surface of the body. The 

 caudal end of the body bears a mass of very short hooked setae. The 

 fourth, fifth, and sixth segments are movable, although they fit closely 

 together to form an even surface and are not capable of telescoping. 

 At dehiscence they separate, showing deep incisions. The genera of 

 Papilionidae may be separated as follows : 



a. Body surface without distinctly carinate ridges; dorsal surface of 

 abdomen always with a row of small rounded tubercles on each 

 side of the meson, the largest on segments 4-7, and usually a row of 

 smaller tubercles on each side of the spiracles ; ventral surface with 

 two distinct tubercles on each leg, a transverse row near the caudal 

 margin of the mesothoracic wings, and often on the veins near the 



margin Papilio Linnaeus. 



aa. Body surface with distinctly carinate ridges, but never with small 

 rounded tubercles on the abdomen, occasionally with very minute 

 tubercles on the wings and other appendages. 

 b. Body without prominent lateral expansions of the abdominal seg- 

 ments or dorsal carinate ridges, 

 c. Body with a very low dorso-mesal ridge on the thorax with a 

 small mesothoracic elevation; a prominent carinate ridge at 

 each lateral margin of the body and no dorso-lateral ridge ; 

 cephalic projections large and prominent ; body very strongly 

 convex on the ventral surface in the region of the wings. 



Euplweades Hiibner. 

 cc. Body with a low dorso-mesal ridge on the thorax ending in 

 a very prominent mesothoracic elevation ; a very low dorso- 

 lateral and lateral ridge on each side of the abdomen ; cephalic 

 projections not very large ; body never strongly convex on the 



ventral surface Iphiclides Hiibner 



bb. Body with prominent lateral expansions of the first four abdom- 

 inal segments, making this the widest part of the body ; abdom- 

 inal segments with dorsal carinate ridges on each side of the 

 meson, most prominent on segments 5-7, which are highest in 

 the middle of each segment and curve to each margin, giving it a 

 scalloped appearance in lateral view Laertias Hiibner. 



The following species were examined : 



Laertias philenor Linnaeus 



JpJiiclidcs aja.v Linnaeus 



Euphocadcs troilus Linnaeus, palamcdcs Drury 



Papilio daunus Boisduval, eurymedon Boisduval, rutulus Boisduval, 

 glaucus Linnaeus, polyxcncs Fabricius, thoas Linnaeus, machaon 

 Linnaeus, zolicaon Boisduval, brcvicauda Saunders 



