PLATE 29 
Recurvaria milleri: 
A. —Imago. (Drawn by Miss E. Armstrong.) 
B. —Twig of lodgepole pine showing the 1919 needle growth: a, Eggs and their 
location between scales at base of needles. The needles which covered the eggs 
have been removed in order to expose them for photographing. Print slightly re¬ 
touched. Approximately X 2. 
C. — a, Lodgepole pine needle showing larval mine; ai , entrance hole of larva; 6, 
larva exposed in needle mine; c, pupa in normal position in needle; d, parasitized 
larva in normal position in needle. Approximately X 2. 
D. —Terminal twig of lodgepole pine showing partial defoliation The 1919 needle 
growth is at tip of twig and shows full complement of needles, as the photograph was 
made prior to the 1919 attack by the moths. The almost denuded section of the twig 
immediately below supported the 1918 needle growth, which was mined by the larvse 
and has since fallen. The 1917 growth appears just below and shows as nearly a com¬ 
plete set of needles. Still farther down the twig the 1916 growth shows defoliation 
comparable to the 1918'growth section. Note difference in degree of defoliation 
every alternate year, the heaviest occurring the year preceding flight. This is 
accounted for by the fact that the larva mines two needles of this year’s growth as 
compared to one needle of the growth produced in the year of flight, which receives 
the initial attack by the young larva. The same conditions are shown on the twig 
branch to the right. 
(142) 
