150 
Journal of Agricultural Research 
Vol. XXX, No. 2 
not unusual, external opening a wavy, 
elongate slit, without spines, but with 
a few quadrilocular disk pores scattered 
around this opening; abdominal spira¬ 
cles much smaller than the thoracic, 
external opening usually irregularly 
star-shaped, each accompanied by a 
number of quadrilocular disk pores, 
these spiracles occurring, so far as can 
be determined after a careful examina¬ 
tion of available material, in 5 pairs, the 
3 posterior pairs usually found in 
Orthezia apparently lacking in this 
species; derm with the quadrilocular 
disk type of pore only, these scattered 
over the body, but most abundant 
ventrally in the genital region, and 
dorsally in the spaces between the 
spine clusters, with smaller quadrilocu¬ 
lar pores, set at the inner ends of tubu¬ 
lar ducts, scattered through both the 
dorsal and ventral spine clusters; 
spiracles with a more or less distinct 
collar of irregular wax pores; derm 
ventrally with a transverse cluster of 
stout setae anterior to the genital 
opening, and a few additional elsewhere 
in connection with spine clusters; dor- 
sally with a few such setae, usually in 
more or less definite relation to the 
clusters of spines; body spines in 
clusters dorsally and laterally, corre¬ 
sponding approximately in size and 
shape to the external secretion already 
described, ventrally in definite clusters 
surrounding the legs, antennae, and 
beak, and in a definite transverse band 
across the abdomen just behind the 
posterior legs (ovisac band), this con¬ 
tinuing posteriorly at the margin for a 
short distance, finally fading out, not 
continued as a broad band completely 
encircling the ventral surface of the 
abdomen, as is usual in Orthezia; 
inclosed ventral surface of the abdomen 
without spines; anal ring of moderate 
size, with an outer row and an inner 
row of irregularly clustered pores, and 
6 relatively short and stout setae. 
Larva. —Elongate oval, tapering 
somewhat posteriorly, average length 
as mounted 140 microns, width 86 
microns; derm membranous except 
for appendages, and a transverse plate 
ventrally just anterior to the anal ring; 
antennae 4-segmented, the first stout¬ 
est, the last longest, and with an 
elongate terminal spine as in adult, 
each segment bearing a few setae and 
the terminal, in addition, bearing a 
curved fingerlike spine near base; legs 
not unusual, the fusion of segments as 
in adult; derm bearing numerous 
spines, these grouped into definite 
clusters approximately as indicated in 
figure; midventral longitudinal area 
entirely destitute of spines or of setae 
and the lateral ventral area with only 
narrow bands of setae; spines dorsally 
grouped into median transverse clusters 
on the head and thorax and into similar 
but shorter and bisected rows on the 
abdomen; abdominal spiracles present, 
minute, number not definitely deter¬ 
mined; with a relatively large quadri¬ 
locular disk pore close to the opening 
of each; derm with an occasional 
quadrilocular disk pore, and with an 
occasional relatively large seta, the 
latter in definite relation to the spine 
groups; anal ring in general similar to 
that of adult. 
Adult male. —Small, elongate; total 
length 1.4 millimeters, width through 
thoracic region about 0.5 millimeter, 
length of antenna about 2.1 millimeters, 
length of wing 1.7 millimeters, width 
0.9 millimeter; head strongly triangu¬ 
lar in outline anteriorly, bearing a 
number of elongate slender hairs; com¬ 
pound eyes large, slightly protruding; 
with 2 ocelli, 1 behind and somewhat 
above the posterior outer angle of each 
compound eye; head broad behind the 
eyes, and nearly as wide as the distance 
through the eyes; antennae 9-seg- 
mented, the first 2 stout, the remainder 
very elongate linear and, excepting the 
2 basal, bearing an apparently varying 
number of slender, threadlike setae, 
and in addition numbers of long, 
slender setae, these never in clusters or 
in any obviously definite arrangement, 
terminal segment with a stout, curved 
seta close to apex; legs elongate, 
slender, the trochanter distinctly set off 
from the femur, and the tibia and tarsus 
not fused as in other stages of the 
species, claw very long and slender, 
only slightly curved, digitules as in 
adult but more slender; legs bearing 
numbers of long, very slender setae on 
the basal half, these becoming stout 
on the apical one-half to one-third of 
the tibia and on the tarsus; wing 
broad, with only the costal thickening 
arising close to the base; halteres not 
observed; abdomen roughly parallel¬ 
sided, bearing transverse segmental 
rows of long slender setae, and an inde¬ 
terminate number, apparently 5, of 
simple abdominal spiracles; with a 
single transverse band of stout, tubular 
ducts just anterior to the apex, and 
with very peculiar chitinized paired 
terminal appendages instead of the 
fused conical sheath present in most 
male coccids. 
This species has been described from 
several mounted and unmounted adult 
females, larvae, and males from the 
Virginia shore of the Potomac River 
opposite Plummers Island, Maryland, 
under rotting logs and among trash, 
