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THE MAPLE PSEUDOCOCCUS. 
( Pseudococcus aceris Geoff. ) 
By L. O. Howard. 
Fig, 2.i.—P$eudocuccu.j aceris: a, adult females on leaf: b, young female 
and males on bark— natural size (original). 
There exists in parts of the United States a scale upon maple which 
is identical with a European species, and which may have been 
imported into this country. It bears a superficial resemblance to the 
common cottony maple scale (Pulvtnaria innumerabilis'Ra.thv.), and is 
likely to be mistaken for the latter species at a harried glance. The 
latter insect, however, is very common, while the species under con- 
sideration is rare, or at least has been rare until recently. Hut one 
account of the insect in the United States has been published, and 
this is Miss Emily A. Smith's "Biological and other notes on Pseudo- 
coccus aceris,'' published in the North American Entomologist for 
April, 1880. This journal had but a brief existence and comparatively 
few copies were published, s<> that this sole account is practically 
