•508 



PAPILIONID.E. 



" MaxillcB rather long. 



'■^ Labial palpi very short, clothed with long loose scales ; apparently triarticulate, but the arti- 

 culations barely discernible. 

 '■^Antenna rather long, slightly arched ; club but slightly elongate, compressed. 

 " Thokax stout. 



"Anterior ivings triangular; the anterior and outer margins nearly equal, the inner about half 

 the length of the anterior. Costal and subcostal nervules united at their origin ; first 

 subcostal nervule thrown off considerably before the middle of the cell ; the second not far 

 from its end ; third and fourth at rather more than an e(]ual distance beyond it, united at 

 their origin for about one third of their course ; upper discocellular nearly equal to the 

 space between the two discoidal nervules, directed obliquely downwards and backwards ; 

 baseo-median not reaching the submedian nervule. 



" Posterior wings folded longitudinally; the inner margin straight, nearly double the length of 

 the abdomen, in the male folded back upon the wings and furnished with a tuft of delicate 

 hairs ; anterior margin about half the length of the inner ; posterior margin sinuate, 

 gradually produced into a long tail curving outwards at the extremity. Precostal nervide 

 branched, the inner directed forward, the outer anastomosing with the costal. Discoidal 

 cell very short and narrow. Third subcostal nervule bent, and united to the third median 

 nervule so as to seem to bo a fourth median nervule. 



" Legs rather long, slender. Anterior tibiae with a stout spur near the middle, covered with 

 scales. Tarsi rather longer than the tibia3 ; the first joint equal to the three following 

 combined ; second and third nearly equal ; fourth longer than these ; fifth longer than the 

 fourth. Tai-si of the second and posterior legs neaily double the lengtli of the tibia; ; their 

 first joints elongate ; second, third, and fourth progressively shorter ; fifth about c(]ual to 

 the third. Claws simple or bifid. 



" AuDOMEN short, stout. 



" This anomalous genus, place it where we will, interrupts the natural 

 succession of the genera in the fiimily to which it belongs. In the situation 

 in wliich it is now placed it disturbs the very easy transition from Fajjilio, 

 through Eunjcus to Parnassius ; but its affinities to some of the species of 

 Papilio are so close, that we cannot, in a linear arrangement, interpose any 

 other form between it and that genus. 



"Tlic neuration of the anterior wings is very remarkable from the apparent 

 bifurcaticm of the third subcostal nervule ; an appearance due to the union, 

 at their origin, of the third and fourth subcostal nervules. The posterior 

 wings offer an equally striking character, the smallncss of the cell, to which 

 must be added the singular bend of tlic tliird subcostal nervule, wliich might 

 cause it to be mistaken for a fourth median. This pecidiarity and the 

 structure of the posterior wings in Lenrophasia and some other genera lead 

 me to suspect that this nervule should be considered as quite distinct from 



