237 
probability that the insect is much more widely distributed than 
the records indicate, and that it has not been more often recorded on 
account of its strong resemblance to the cottony maple scale. Almost 
anyobserver.no matter how familiar he might be with scale-insects, 
would mistake the species without careful examination. It must be 
stated further that in her paper, Miss Smith wrote that she had learned 
through J. D. Putnam, of Davenport, Iowa, that Dr. S. S. Rathvon, of 
Lancaster, Pa., had found the species upon hard maple in that city. 
An egg-mass was furnished to Miss Smith, and she judged it to be the 
same. This record, however, is not a positive one as Miss Smith does 
not seem to have seen the insect itself. 
In view of this apparent increase of the species, it will be well to 
review in brief its life history, especially as Miss Smith's paper is diffi- 
cult to consult. The different stages of the insect have been carefully 
figured, and will give a better idea of its appearance than any descrip- 
tion. 
Fig. 24.— Pscudocoecus aceris: a, adult female; b, antenna of same; c, adult male; d, young larva: 
e, antenna of same — cr, e. d, greatly enlarged; b, e, still more enlarged (original). 
The insect, as it occurs upon the leaves in summer, appears as an 
oval mass of powdery, slightly stringy, white wax about a quarter of 
an inch long and a little less in width (Fig. 23 a). This mass>contains the 
body of the adult female and her eggs. The female herself occupies 
the anterior end of the mass and her body constitutes about one-fourth 
of its bulk (Fig. 24 a). She is light yellow in color, about 5 mm long by 3 nun 
in diameter; the upper surface of the body is covered with numerous 
spinnerets, which are more dense at the posterior extremity, and inter- 
spersed with short spines which are somewhat longer at the posterior 
end. The antenna* are 9-jointed (Fig. 24 b), joint 9 longest, joints 3-5 
