418 FIFTH REPORT OF THB ENTOMOLOGICAL COMMISSION. 
and one side. The ventral scale is well developed, especially at the margin, where 
it la inucli thickened and is dark oolored; the centre] part ia white and adheiee 
to the berk, while the thickened margin la eeeilj i ring. Diam 
. 1.5 :; (.« 6 inch). 
[/«.— The remele Ea nearly circular, being but slightly longer than broad, and 
ih-brown odor. The segmentation of the bodj -tinct. 
;t the following oherectera: 
Although forty-three specimens were carefully examined, no groups of apinnereta 
were found. 
rhereare tine- pairs of well-developed lobes. Tha median loi.es are rounded pos- 
teriorly, or often with a slight notch on the lateral margin, and tap. -r to a point 
anteriorly: the second lob side is somewhat triangular in outline, with the 
lateral edge serrate ; the third lobe is larger than either the firet or second lobes, 
triaugular iu outline and serrate on lateral margin. 
The posterior third of the lateral margin of the segment appeara to be of the same 
structure as the lobes, and has live triaugular serrate lobes; the posterior one of 
is the largest, and is larger than either of the true lol 
There are seven club-shaped thickenings of the body wall upon each side of the 
meson, which are arranged as follows : One termiuatiug near the lateral margin of 
the first lobe : this extends anteriorly but a short distance beyond the lobe. One 
appearing to be a prolongation of the mesal margin of the second lobe; this extends 
anteriorly to a point laterad with the anus. One terminating between the second 
and third lobes; this is linear, inconspicuous, aud sometimes obsolete. One termi- 
nating at the base of the plates between the second aud third lobes, and also one 
terminating at the base of the plates between the third lobe and the thickened 
lateral margin: these two are the largest, and extend anteriorly the farthest of all 
the thickenings, one terminating at the mesal margin of the third lobe, aud one at 
the mesal end of the thickened lateral margin of the segment. 
The plates between the median lobes and between the first and second lobes of 
each side are very small aud often obsolete ; there are two small irregularly brauched 
plates between the second spine aud the third lobe, and also two similar plates 
between the third spine aud the mesal end of the thickened lateral margin. 
There are five pairs of spines on the veutral surface of the segment, and six on the 
dorsal. Those at the base of the median lobes are very small, the others are con- 
spicuous. The second and third spines of each surface are situated just laterad of the 
second and third lobes respectively : iu each case the dorsal spiue is slightly mesad 
of that ou the veutral surface. The fourth spiue of the veutral surface is on the 
penultimate lobe of the thickeued lateral margin. The fifth spine of this surface is 
near the auterior end of the thickened part of that ruargiu. The fourth aud fifth 
spines of the dorsal siuface are iu each case mesad of the corresponding spines of the 
ventral surface. There is also a spine on the dorsal side, very near the penultimate 
segment. 
Scale of male.— The scale of the male is oval iu outline, and of the same color as 
that of the female ; the protuberance covering the larval ski u is near the anteriorend. 
The ventral scale is similar to that of the female, except that the margiu is not so 
much thickened. 
Male. — Ouly dead and shriveled males have been observed. Described from forty- 
three females and many scales of each sex. (Comstock Agr. Rpt.. 188 
59. rseudococcus aceris (Geoffrey). 
This species, stated by Signoret, according to Comstock, to be one of 
the most common in France, would seem to be comparatively rare in the 
United States. u It has been collected by Miss Emily Smith on maple 
[Acer saccharinum) at Peoria, 111.', and forms the subject of quite an ex- 
