LÉPIDOPTÉROLOGIE COMPARÉE 345 



strongly squamous surface. In shape, this is characteristic of the 

 genus as it is much larger and broader, although more pointed, 

 than in either Lycia or Ithysia; nor has it the tendency of thèse 

 to be iiidented at the base. 



The valves, too, are simpJe and are stronger toward the tip than 

 in the others. There is thus less appearance of a falcate extremity 

 produœd. In gênerai outline, the valves are shaped roughly like 

 one's thumb viewed from the side and including both joints, 

 although perhaps the tip is more rounded. The costal ridge of 

 the valve is narrow, slightly thickened and raised. Along its 

 whole length the valve is clothed with thick hairs. 



The œdeagus is short and stout, and not thickened whilst the 

 vesica is provided with a band of exceedingly strong cornuti 

 arranged somev/hat like a comb. Thèse contrast strongly with 

 the obsolète or barely indicated, cornuti seen in Ithysia and Lycia. 

 The female is short and stout and, although the gênerai colo- 

 ration is black, it is covered w^ith rather long w^hitish hairs, and 

 is plentifully besprinkled with red or orange scales. The rudi- 

 mentary wings are more linear and pointed than in Ithysia, and 

 the wing hairs are much longer. As in the other gênera, the ovi- 

 positor is long and its somewhat bilobed tip covered with a few 

 hairs. 



The pupa is not so stout and is more regularly conical in the 

 abdomen than in the genus Ithysia. 



Compared with that of Ithysia, the larva is less smooth, not so 

 regularly cylindrical and is a little slimmer. The anal claspers 

 are much more spreading due to a more arboreal habitat. On 

 segment 8 of the abdomen are two well developed warts; the head 

 is smaller and less square eut than in Ithysia. 



A biological point of différence, which seems to be of some 

 importance, is that the larva in Pœcilopsis, when disturbed, simply 

 clings more tightly to the food plant, as I hâve seen repeatedly in 

 fomoruiria and lapponaria, whilst in Ithysia, it falls at once, curls 

 itself up, and feigns death. 



