( 383 ) 



extent of the scaling ; in the ? of Leucophasia gigantea, for instance, the seven 

 distal joints are not scaled, while in the c? the bare area occnpies only five joints and 

 extends (ventrally) a little npon the sixth. 



Each not-scaled joint lias, instead of the single median groove of the Pierinae, 

 in all the species three grooves standing always at the apical edge of the joint, one 

 mesial and one on each side (f. 29, Leucophasia sinapis; f. 30, Dismorphia thermesia 

 [1819]). The grooves vary very much iu size in the different species; the middle one 

 is always the largest; sometimes there is a small pnnctnre-like additional groove at 

 each side (f. 29). The apical joint (consisting of two fnsed joints) bears two trans- 

 verse rows of grooves (figs. 29, 31); the lateral ones extend mneh upon the dorsal 

 side, appearing sometimes nearly dorsal. Extremes in the size of the grooves are 

 represented by J*, orise (1836) and D. t'tonelia (1782) ; in the former sjiecies the 

 grooves are small, ronnded, and widely separated, while in eumelia (f. 31) and allies 

 the lateral ones extend along the apical edge of the joint reaching the mesial 

 groove. 



The fine sense-hairs are restricted to the grooves. The rest of the not-scaled 

 area is covered with setiferous jmnctures, except in the middle of dorsal surface. 



Of the sense-bristles there are generally two pairs developed, the two bristles 

 of the first pair standing at either side of the mesial impression, sometimes followed 

 by a second pair (f. 31), and the other pair being lateral, standing at the proximal 

 edge of the lateral grooves (figs. 29 — 31). Tlie Dismorphiime have, therefore, the 

 same regnlar bristles as the Pierinae. 



5. PAPILIONIDAE. 



The structure of the skeleton of the antennae is in this family very coarse (see 

 Bodine, Tr. Amer. Ent. Soc. 1896. t. 4. f. 39). The extent of the scaling and of 

 the fine sense-hairs is very difierent in the various members of the group ; the 

 latter are, however, always restricted to the ventral surface. The configuration of 

 the ventral surface and the number and position of the ventral sense-bristles exhibit 

 also diverse development in the various Papilionids. 



a. PAPILIONINAE. 



The antenna is generally somewhat compressed laterally ; the distal joints are 

 mostly more expanded ventrally than dorsally, so that the club is curved dorsad. 

 In most forms the joints are somewhat broader at the apex than at the base. The 

 ventral surface is sometimes almost evenly convex, without impressions (f 38, 

 Leptocirais ; f 36, Pnpilio agame.nmon), but is often depressed or subimpressed 

 laterally (in the species allied to Papiiio nmchaon, memnon, etc.) ; in a great many 

 Papilios (in all so-called " Urnitkoptera" then iu P. hector, philoxenus, sesostris, 

 etc., belonging to Haase's subgenus Pharmacophagus, in Euryciis and Euryades) 

 there is at each side of the ventral snrfiice a more or less elongate groove (f. 40, 

 Papiiio phiio.venxs) which is deeper on the stalk than on the club. A similar 

 groove is found iu certain Papilios allied to P. poikiUriu.-i (f i. in /'. leosthencs), but 

 here the grooves are generally less well defined and stand nearer the median line of 

 the joints. The interspace between the two grooves is never carinate, as it is in the 

 ^Symphalidae. 



The fine sense-hairs, restricted to the ventral surface, are distributed as follows : 



