1252 THE BUTTERFLIES OF NEW ENGLAND. 



munity ? Not a single parasite is known, -and it remains to be investigated 

 whether it escapes tliat arch enemy of our swallow-tail caterpillars, Trogus 

 exesorius. It would be worth while to bring the two into relation and 

 watch the result. 



LIST OF ILLU8TRATI0NS.-LAEBTIAS PHILENOR. 



General. Imago. 



PI. 26, fig. 6. Distribution ia North America. PI. 16, fig. 3. Upper surface. 



Egg. 35 : 24, 25. Male abdominal appendages. 



PI. 66, fig. 4. Colored. 40 : 8. Neuration. 



8. Bunch of eggs. 43: 19. Hind wing of male, showing fold 



Caterpillar. of inner margin. 



PI. 72, figs. 7. Caterpillar at birth. 45 : 4. The fold, opened and highly mag- 



76 : 13, 20. Full grown caterpillars. nifled. 



21. Third stage, dorsal view. 5. The same in cross section. 



80:1-5. Front view of head, stages i-v. 46:42. Androconium. 



Clirysalis. 56 : 8. Side view, with head and appen- 



Pl. 85, fi". 14. Dorsal view. dages enlarged, and details of the structure 



15, 16. Outlines. of the legs. 

 17. Three-quarters view. 

 20. Side view. 



IPHICLLDES HUBNER. 



Iphiclides Hiibn., Verz. bek. schmett., 82 1833). 



(1816). Papilio (pars) Auctorum. 



Podalirius Swains., Zool. ill., ii: 105 (1832- Type. — Papilio podalirius. 



Some to the sun their insect wings unfold. 

 Waft on the breeze, or sink in clouds of ^old; 

 Transparent forms, too fine for mortal sight. 

 Their fluid bodies half dissolved in light; 

 Loose to the wind their airy garments flew, 

 Thin glittering textures of the filmy dew. 

 Dipt in the richest tincture of the skies. 

 Where light disports in ever mingling dyes. 

 While every beam new transient colours flings, 

 Colours that change whene'er they wave their wings. 

 Pope.— ffape of the Lock. 



Imago (56:9). Head large, profusely clothed with very long, erect, equal hairs. 

 Front somewhat tumid, especially below, on the lower half projecting a little beyond 

 the front of the eyes and increasingly so downward ; sides considerably sunken below 

 the eyes, particularly above; next to the border, and closer to It than in the other 

 genera, a slight sulcation directed toward the outer edge of the antennae ; below the 

 antennae, the front is of about equal height and breadth, and perhaps rather broader 

 than the eyes on a front view ; upper border projecting rather broadly between the 

 antennae; lower border strongly rounded. Vertex somewhat tumid at the sides, but 

 little in the middle, forming a straight, rather broad, transverse ridge, depressed In 

 the middle, whose ends are swollen and thrust considerably forward ; portion in front 

 of the ridge slightly tumid and separated from the ridge by a slight sulcation, and 

 from the front by a similar one. Eyes very large and very full, naked. Antennae in- 

 serted vyith their anterior half in the middle of the summit, separated by a space 

 nearly equal to the diameter of the second antennal joint; scarcely longer than the 

 abdomen, composed of forty-one joints, thickened a little, and, excepting on the club, 

 slightly expanded on the inner side at their tips, the termin.al ten or eleven forming 



