512 PAPILIONID^. 
Geuus ORNITHOPTERA. 
Ornlthopterci, Boisduval, Faune de I'Oceaiiie, pi. iv. fig. 1 (183.2) ; Doubleday, Gen 
Diurn. Lep. i. p. 3 (184G). 
" Head large. 
" E^ics large, round. 
" Ma.vUhre of moderate length. 
" Lahial palpi closel}' pressed to the forehead, short, obscurely triarticulate, covered with long 
hairs, the basal and apical joints ver}' small, especially the former, which is barely 
discernible. 
" Antennce very long, gradually clavate ; the club arched, slightly tapering towards the apex. 
" TnoEAX very stout, the prothorax very distinctly developed. 
"■Anterior u'higs powerful, elongate, triangular; upper discocellular nervule about equal in 
length to the space between the two discoidal nervules ; third median nervule mostly 
thrown off exactly opposite the end of the cell; median and submediau uervurcs connected 
by a baseo-median nervule. 
" Posterior winrjs small in proportion to the anterior, subtriangular ; the costa slightly rounded ; 
the outer margin rounded, dentate; precostal ncrvure two-branched, the inner branch bent 
downwards and united to the co.stal uervure. 
"■Legs strong, elongate. Anterior tibiis with a very stcut spur. Tarsi with the first joint 
about equal in length to the rest combined ; fourth joint shortest ; second, third, and 
fifth nearly equal. Claws simijle, strong. 
"Abdomeji elongate, stout, the last segment always furnished in the males with two very large 
valves. 
" Larva tuberculate : the tentacula contained in a fixed bifid sheath. 
" Pftpa stout, slightly arched, tuberculate ; head bifid. 
" The species composing this genus are so closely allied to PcqyUio, that 
the propriety of separating them seems almost questionable. In the larva 
state they differ in having an external forked sheath for the prothoracic 
tentacula. The perfect insects have the prothorax more developed; the 
abdomen larger, longer, and very deeply grooved below, and the valves of the 
last segment far larger than in any species of Papilio. 
" The larvae, of which the discovery is due to Dr. Horsfield, resemble those 
of Thais and of some Papiliones in being tuberculated. The pupa has the 
peculiarity of not being surrounded by a transverse band, but sustained by a 
silken thread on each side, attached to a small lateral tubercle." {Louhle- 
dajf, I c.) 
