:iCLE VI.—ON SOME INSECT ENEMIES OF THE 
SOFT MAPLE (ACER DASYCARPUM). 
ft 
4otes and Experiments on the Soft Maple Bark Louse. 
4 
(Pulvinaria innumerabilis, Rathvon.) 
m 
Order Hemiptera. Family Coccid^l 
(Plate XI. Figs. 1 and 2.) 
annoying and even destructive species, which attracted so 
attention four years ago and then suddenly disappeared from 
ommenced, last year, to appear again in noticeable numbers 
soft maples throughout Central Illinois, and during the season 
, 3 sed was excessively abundant throughout the State from at 
Is far south as Shelbyville to our northern limits. Notwith- 
y the length at which it has been treated in former reports 
is office, and the numerous articles upon it which have ap- 
in the agricultural and political papers during the last few 
p*eat numbers of my correspondents were unacquainted with 
ae and life history of the species. In fact, fully half the 
logical correspondence of this office during the months of 
nd July related to this bark louse. In the earlier articles 
in the Beport, some premature conclusions were reached 
spect to its life history, and I do not know that exact ex¬ 
it has heretofore been made with respect to its destruction. 
females of the preceding year which had wintered upon the 
f the maples, began to attract general attention early in June, 
wing by this time attained their full growth _ and developed 
tony egg masses beneath the scales into which their bodies 
•ome practically converted. By the middle of June it was 
see that the lice were abundant almost everywhere upon the 
1 and they commenced to appear likewise upon a number of 
*ees and plants. On the 14th, we noticed them upon the pear 
i elder at Normal, and on the 16th, upon the grape and wal- 
Quincy, and upon the pawpaw, grape, and honey locust, at 
