22 PAPILIONID.E. 



Genus IV. LEPTOCIRCUS Swainson. 

 Swainson, Zoo!. III. 2d ser. t. 106. (1832). 



Papilio Fabr. 

 Erycina God'. 

 Iphiclides Hubn. 



Head large ; forehead broad. 



Eyes ovate, prominent. 



Maxillce rather long. 



Labial Palpi very short, clothed with long loose scales ; apparently triarticulate, but the articulations 

 barely discernible. 



Antenna? rather long, slightly arched ; club but slightly elongate, compressed. 

 Thorax stout. 



Anterior Wings 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 equal distance beyond it, united at their origin for about one third 

 of their course ; upper disco-cellular 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 nervule 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 be a fourth 

 median nervule. 



Legs rather long, slender. Anterior Tibia? with a stout spur near the middle, covered with scales. 

 Tarsi rather longer than the tibia; ; the first joint equal to the three following combined ; second 

 and third nearly equal ; fourth longer than these ; fifth longer than the fourth. Tarsi of the 

 second and posterior legs nearly double the length of the tibiae ; their first joints elongate ; second, 

 third, and fourth progressively shorter ; fifth about equal to the third. Claws simple or bifid. 

 Abdomen short, stout. 



Lauva and Pupa unknown. 



