PAPILIONINJE. 155 



median slightly I'ecurved. Head and eyes large ; tliorax very stout; abdomen long, 

 males furnished witli two large anal valves ; palpi small, pressed to the head; legs 

 long, anterior tibia with a short spur about the middle beneath, posterior tibia with 

 two spurs at the apex, claws simple ; antennae very long, gradually clavate. Sexes 

 dissimilar. 



Larva elongated, thick, slightly attenuated at both ends, with dorsal and lateral 

 rows of rather long fleshy tubercles ; the second segment furnished with a horny 

 plate, beneath which the nuchal retractile tentacles lie concealed. Pupa thick, 

 anterior part curved backward ; head broad and flat ; thorax conical, flattened in 

 front and behind ; abdominal segments with dorsal short stout conical protuberances ; 

 wing cases dilated laterally. 



Type, 0. Helena. 



ORNITHOPTERA DARsIUS (Plate 55, Fig. 1, a, h). 



Ornitlioptera Darsius, Gray, Catal. Lep. In;^. Brit. Mus. i. p. 5 (1852); Feldcr, Wien. Eiit. Monats. iv. 



p. 97 (1860). 

 Ornithoptera Amphimcdon, Doubleday and Hewits. Gen. D. Lep. pi. i. fig. 2, $ {nee Cram.). 



Male. Forewing olive-black : hindwing with the basal area, abdominal and 

 exterior borders purple-black, the discal area and end of cell crossed by a very broad 

 scalloped-bordered golden-yellow band intersected by black veins. Female paler : 

 forewing dark olive-brown, with the outer veins- longitudinally bordered with dusky 

 olivaceous-grey : hindwing with the yellow band traversed outwardly by a curved 

 confluent row of large oval black spots, the outer intervening yellow space being 

 more or less obliterated, and the space between the lower median and submedian 

 veins adjoining the upper part of the band being dusky grey. Body, palpi and legs 

 olive-black, abdomen with broad lateral yellow bands and narrower bands beneath, 

 sides of thorax crimson. 



Expanse, $ 5-|-, ? 6^ inches. 



Larva dull purple-brown, with two dorsal and anterior lateral rows of fleshy 

 tubercles, the tubercles on the eighth segment and a streak from its base to lower 

 end of seventh segment pale pink ; between the tubercles are dark brown streaks. 

 Feeds on Aristolochia. Pupa pale purplish-ochreous, bent backward anteriorly, 

 thorax conical, anterior segments of abdomen also conical. 



" This very fine insect is not uncommon in open woods, and may often be seen 

 flying in pairs ; — a female in the first place rising slowly and nearly vertically into 

 the air, and then followed, at a short interval in the same direction and with the 

 same style of flight, by a male, the two keeping about two or three feet apart, rising 

 and falling in the air in perfect unison, as if for the period under the influence of a 

 spell or of a kind of animal magnetism. The plienomenon recalls to mind the flying 



X 2 



