214 SCALE-INSECTS, BARK-LICE, MEALY-BUGS. 
out for it in our own state. It somewhat resembles the very 
common cottony scale, found in destructive numbers in many 
cities and villages in Minnesota, where it causes much injury to 
such shade trees as the box elder and maples. According to 
Howard, from whom the beautiful illustrations were: received, 
Figs. 171-172, this insect occurs upon the leaves in summer, ap- 
pears as an oval masss of powdery, slightly stringy, white wax 
about a quarter of an inch long,and a little less in width, Fig. 171, a. 
This mass contains the body of the adult female and her eggs. 
e 
6 
Fic. 172—Pseudococcus aceris Geoff.: a, adult female; b, antenna of same; c,adult 
male; d, young larva; e, antenna of same—a, c, d greatly enlarged: b, e, still 
moreenlarged. After Howard, Div. of Entomology, Dep. of Agriculture. 
The female occupies the anterior end of the mass, and her body 
constitutes about one-fourth of its bulk. She is light 
yellow in color; the upper surface of the body is covered with 
numerous spinnerets, which are more dense at the posterior ex- 
tremity, and are interspersed with short spines. The male larva 
is reddish yellow, and the adult male, shown in Fig. 172, c, is also 
red. Miss Smith, who first studied this insect in the United 
States, at Peoria,-Ill., found by practical experience that a wash 
composed of three gallons of water, % pound white hellebore, 
and one teaspoonful carbolic acid, put on with a white-wash 
brush during the warm days of winter and early spring, when 
