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the names of the authors withheld, have been written, but these have 
in the main been mere conjectures and erroneous in description. 
Some few articles have appeared in reference to artificial remedies to 
be applied, but up to this date nothing giving the entire natural his¬ 
tory of the insect. 
The following notes were made in Peoria, Illinois, together with 
specimens taken at the time, in the year 1877 : 
May 15th. The female becoming distended laterally, the deposition 
of eggs not commenced. 
May 21st. The wavy mass protruding from end of abdomen, rais¬ 
ing that portion of the body entirely off the limb, the mass filled with 
egge. 
May 30th. Egg-mass growing rapidly, from warmer part of the 
city the mass is much more enlarged than where the former notes 
were taken. 
June 2nd. Deposition of eggs continuing, mass enlarging, the 
female distended and enlarged. 
June 6th. Waxy mass issuing from sides and end of abdomen. 
June 8tli. Found L. acericola on box elder tree not in any consid¬ 
erable number; advanced about the same in size-mass as those on 
soft-maple. 
June loth. To-day the young lice have for the first time been 
discovered. 
June 16th. The young lice are hatching, but owing to a cold sj^ell 
of weather prevailing at this date not as rapidly as they would other¬ 
wise have done; the deposition of eggs continuing, the female in good 
condition. 
June 17. The young lice appearing, as soon as hatched they com¬ 
mence crawling quite actively over the limbs and settle down on the 
under side of the leaves near the mid-rib, although a few are on the 
upper side. When detached from the tree they will crawl up objects 
and show great power of endurance. 
June 17th to 30th. Young lice settled down on the leaves mostly 
under side, although many are found on the upper side. They always 
settle down along the veins, and unless the eye is practiced in the 
search for them, they are liable to escape notice. 
July 3d. The females are mostly dead, but a few in cooler places 
are still alive, and the egg-mass incomplete, unlike the Oyster shell 
Bark-louse of the apple, Mytilaspis pomicorticis , Riley, the body of the 
female does not shrink to any great extent, and after the eggs have 
hatched and the Mother-louse dead, the general appearance is the 
same as before. 
July 10th. The male pupae easily distinguished. 
August 13th. Male Lecanium acericola coming out in considerable 
numbers, and come from the anterior portion of the scale. Have two 
wings, rose-colored, two anal stylets, whitish in color and longer than 
the body. Hymenopterous parasite coming out from the scales of 
the bark-lice, which have been observed as turning black. 
August 20th. Males continue appearing, are very active flying 
over the leaves, coition taking place. 
August 29th. Parasites numerous, one only in each body. 
