PAPILIOXIIS^iE. 
195 
short, not rising above half height of head, pressed close against face, 
clothed with longish hair and scales inferiorly,— basal and middle joints 
about equal in length, terminal one minute ; antcnnce of moderate 
length or rather long, variable in thickness, — the club long, gradually 
formed, usually curved upward and outward ; hmistdlum long. 
Thorax rather robust ; prothorax forming a distinct neck. Wings 
exceedingly varied in outline, large, with strong nervures. iWc-wings 
usually sub-triangular, often more or less produced apically, sometimes 
very narrow and elongate, rarely falcate ; costa slightly or moderately 
convex ; costal nervure very thick, and extending about three-fifths 
length of wing ; subcostal nervure five-branched, very close to costal 
nervure as I'ar as its second nervule,— its first and second nervules 
closely approximate, long, given ofi' not very near to each other, but far 
before extremity of discoidal cell (first in Lconidas and Pyladcs, and 
allies, greatly abbreviated and running into costal nervure), — third 
rather long, curved, given off at end of cell, running close to second, 
and ending at apex, — fourth and fifth branching off far beyond end of 
cell, but nearer to it than to apex, rather short (fourth much arched and 
remote from third) ; disco-cellular nervules all fully developed, — the 
first and second almost vertical, or slightly inclined inwardly or out- 
wardly, but the third very oblique inwardly, and so directly continuous 
of median nervure that lower radial nervule has all the appearance of 
an additional fourth median nervule ; an interno-median nervule unit- 
ing median and submedian nervures near their origin, so as to form a 
small sub-discoid al cell ; internal nervure well developed, free, termi- 
nating on inner margin at some distance from base ; discoidal cell long 
and broad; $ in some species with the lower radial and three median 
nervules, and the submedian nervure on disc, bordered above and below 
by a long space of closely-appressed fine silky short hairs, narrowing to 
a point both inwardly and outwardly. Hind-wings always more or 
less elongate inferiorly (sometimes extremely so), commonly tailed at 
extremity of third median nervule ; costa moderately arched ; apex 
much rounded off; hind-margin more or less dentate, sometimes so 
strongly as to bear several short tails ; inner margin hollowed (in $ 
sometimes folded back and bearing a coating or fascicle of hairs) ; pre- 
costal nervure forked, its lower branch united to costal nervure so as 
to form a small prediscoidal cell ; costal nervure ending at apex ; first 
subcostal nervule given off far before extremity (at from one-third to 
two-thirds length) of discoidal cell ; disco-cellular nervules straight, 
upper one longer (sometimes much longer) than lower, oblique ; dis- 
coidal cell short and much narrower than in fore-wing; submedian 
nervure incurved, endin;:^ at anal anc^le: internal nervure wantino;. 
Legs long, usually thick ; Ibre-coxce free, clothed with short hair ; 
lemora without hair, or with a very little inferiorly, — first pair longer, 
second as long as, third pair shorter than, tibia3 ; all tibia3 strongly 
spmulose, — terminal spurs of second and third pairs rather long. 
