30 
HUNTER: COCCID^E OP KANSAS, III. 
PYGIDIDM OF FE.MALE. 
Median lobes almost fused in basal 
half; inner margins frequently diver- 
gent in distal half, serrate. 
Second lobes half or less than half as 
long as median lobes. 
Space between second and third lobes 
less than twice the distance between 
the first and second lobes. 
Third lobe, inner lobule less than one- 
half inner lobule of second lobe. 
Plates 1, 1-2, 1-2, 1-2, l-i. 
Circumgenital glands: Median, 17-24; 
post, lat., 14-27; ant. lat. , 21-3.3. 
In second row dorsal glands, posterior 
group absent. 
Anteriors 2-6; minute circular glands 
absent. 
Median lobes short, broad, symmetri- 
cally rounded at tips. 
Second lobes half or more than half as 
long as median lobes. 
Space between second and third lobes 
more than twice distance between 
first and second lobes. 
Third lobe frequently prominent; inner 
lobule = one-half inner lobule of sec- 
ond lobe.' 
Plates 1, 1-2, 1-2, 1-2, 1-5. 
Median, 2.3-30; ant. lat., 17-53; post, 
lat., 19-40. 
Posteriors 1-4. 
Anteriors 2-4; minute circular glands 
1 - 10 . 
Ohionaspis salicis-nigrcB, readily seimrated from C. ortholohis by 
its male scale, can, from observations made uiion the pyj^idia of fifty- 
four females, be said to differ in this structure by its shorter and 
broader lobes, by its possession of the posterior group of dorsal 
glands in the second row, and the presence of minute circular glands 
most abundant in the anterior group, second row, and visible beneath 
(ventral aspect) the circumgenital glands. In an examination of 
twenty-seven mounts of ortholohis and twenty-seven mounts of salicis- 
nigrm, I found this posterior group in second -row dorsal glands ab- 
sent in all ortholohis, and present in all but one salicis-nigrar, this 
individual salicis-nigrie was well marked with the minute circular 
dorsal glands. The statement of Comstock'-' concerning median lobes 
of ortholohis, “mesal margins are parallel for more than half their 
length,” holds good in many individuals among salicis-nigrm. “The 
distal margin of each {ortholohis) is rounded does not always ob- 
tain, since the inner distal margin is frequently divergent while the 
outer margin is rounded. 
CfiioiKispis (iiiiericdiiH .Johnson. Plate XfV, fig. 2. 
Scale of female, 2 to 3.5 mm. in length ; exuvi.-eO.b mm. long, sides 
diverging ; generally straight, sometimes curved to right or left, curved 
scales located singly, broadly convex, dirty white. 
Scale of male, tricarinate, 0.7 to 1 mm. in length, sides nearly par- 
allel, clear white ; exuvise pale lemon yellow. 
Mature female. The 2 iygidium bears three jiairs of lobi'S. Median 
lobes iiroininent, fused almost entire length of inner margins, sloj)- 
ing rapidly laterad, lateral margins with from one to three distinct 
1. Cooloy says “ third pair often almost obsoloto.” Sp. Bull. Hatch Exp. Sta. Aug. 1899, p. 
19. When this is the case lobes 1 and 2 are proportionately depressed. 
t. Kept. U. S. Cointn’r Agr. 1880, p. 817. 
