356 I.EPIDOI'TERA. 



northward in the early part of -Inly: a very partial second 

 generation a|)pears in September and October. 



Larva ratlier elongate ; undersurface somewhat flattened ; 

 head rounded, green, a whitish dash lies ou the outside of 

 each lobi; ; body grass-green, the undersurface slightly paler- 

 dorsal line white, moderately broad, commencing as a white 

 stri])e down the face; subdorsal lines white, tjireadlike ; 

 s[)iracular lines yellowish-white, continueil to the anal pro- 

 legs; on the uiidei'surface are three parallel pale longitu- 

 dinal stripes, the middle one the broadest ; legs and prolegs 

 green, (('has. Fenii.) 



^larch till the beginning of May; -luly: September; on 

 Scotch lir and occasionally on Silver lii- (J'inKs picca). The 

 evidrnce of the presence of this s])ecies in the larva state, at 

 tiie thi'ee pi'riods of the year lii'i-e specified, seems to be in- 

 contestal)le. From it has been deduced the opinion that we 

 have three generations of the insect in the year, but this 

 seems impossiI)le, since we certainly seem to have no such 

 distinct emergence of moths in October as would account for 

 a generation of larva; in the early spring. Moreover the 

 insect is known to lie through tbe winter in the pupa state. A 

 probable solution of the difficulty may be, that the eggs laid 

 by females of the very partial emergence of September and 

 October either lie, as such, through the winter, or that they 

 hatch in autumn, and that the resulting larva; hj'bernate 

 wliile small, feed up in early spring, and reinforce the larger 

 number of wintered pupa3, in jiroducing the multitudes of 

 moths w-hich certainly appear in June. This however is but 

 a suggestion. What seems certain is that our knowledge of 

 the whole life history of this very abundant species is lament- 

 ably incomplete. 



I'l PA moderately stout, the anal extremity tapering to a 

 minute spike ; wing- and limb-cases dark green ; abdomen 

 (lark red-brown. Usually subterranean, in a slight cocoon of 



