132 
Journal of Agricultural Research voi. xxx, No. 2 
for 2 small tufts on the head between 
antennae and, normally, 5 indistinctly 
separated, small, median, paired tufts 
on the abdomen just anterior to the 
anal ring; anterior lateral margins of 
body likewise destitute of secretion, 
caudal margin with 3 tufts on each side 
of the middle line, and a fourth, smaller, 
just outside the third, but placed 
somewhat ventrally instead of at the 
margin; ovisac, in the specimens ex¬ 
amined, short, very little longer than 
broad, with 8 more or less distinct 
dorsal ribs and fine longitudinal stria- 
tions ventrally; body, as mounted on 
slide, stout oval, nearly as wide as long, 
length 3 millimeters, width slightly 
less; derm membranous except for a 
pair of elongate triangular transverse 
thickenings opposite genital opening 
ventrally; antennae normally 8-seg- 
mented, apparently not unusual; legs 
characteristic for the genus, tarsal 
claw rather stout, claw digitules stout, 
spinelike, inner face of claw with 3 
denticles; eyestalk conical, apex round¬ 
ed, with a more or less developed basal 
chitinous lip; beak of medium size, 
short conical, apex rounded, 1-seg- 
mented, but with a fairly distinct sug¬ 
gestion of a joint about one-third of 
its length from the base, apex bearing 
several stout setae; thoracic spiracles 
characteristic for the genus, the open¬ 
ings of each surrounded by a cluster of 
spines, with a few of these shorter and 
otherwise modified from the typical 
forms; with 8 pairs of elongate tubular 
abdominal spiracles; derm pores of the 
quadrilocular disk type only, but of 
two sorts, one, the larger, heavily 
chitinized, with relatively large loculi 
and relatively small marginal rim, 
these occurring mostly scattered over 
the dorsal surface but occurring also, 
somewhat reduced in size and distinctly 
reduced in chitinization, in connection 
with the ovisac band and elsewhere in 
the ventral region, the other, much 
more faintly chitinized and with rela¬ 
tively much smaller loculi and larger 
marginal rim, occurring chiefly in the 
midventral abdominal region within 
the area surrounded by the ovisac 
band, many of these, particularly 
among the larger dorsal pores, with 
one or more short lateral chitinous 
extensions, each running to and sur¬ 
rounding a small, simple, clear circle 
or with such small circles close to but 
separated from the disk pore; these disk 
pores scattered, except along the inner 
margin of the ovisac band, here mostly 
closely crowded and extending perhaps 
one-fourth of its width through the 
band; body with rather stout setae, 
apparently indiscriminately scattered 
over it, or rarely, as in the- midventral 
region, in indistinct transverse rows, 
and with 1 transverse cluster anterior 
to the genital opening; spines present 
dorsally in a paired transverse cluster 
just anterior to the anal ring and in 4 
pairs of small irregular median clusters 
on the abdominal segments just anterior 
to this, these spines stout, normally 
tapering only very slightly after the 
initial constriction at the bases, and with 
their apices bluntly rounded; with a 
small, probably paired, marginal tuft at 
the anterior apex of the body; a small 
marginal tuft opposite each anterior 
spiracle and undoubtedly with small 
marginal clusters responsible for pro¬ 
duction of the marginal abdominal 
tufts of secretion along the apex and 
sides of this, but these so mutilated in 
the few specimens available for study 
that little can be said regarding their 
character; ovisac band rather narrow, 
composed of spines similar to, but more 
slender and less heavily chitinized than, 
those found dorsally, accompanied by 
a band of pores several deep along the 
inner margin and extending into the 
spine band for some distance, inclosing 
at least 3 transverse rows of spines; 
anal ring characteristic for the genus 
except that the inner margins of the 
pore band are not angularly produced 
near the anterior and posterior ends; 
with the usual 6 anal ring setae. 
Larva. —Oval, somewhat tapering 
behind, short, length about 715 mi¬ 
crons; width about 430 micrones; an¬ 
tennae 6-segmented, the terminal fully 
twice the length of any of the others; 
eyestalk conical; legs not unusual, 
claw slender, with 2 distinct denticles 
and well developed, spinelike digitules; 
beak 1-segmented; thoracic spiracles 
not unusual; abdominal spiracles elon¬ 
gate, slender, with 8 pairs as in adult; 
derm spines tapering; with occasional 
quadrilocular disk pores, these in more 
or less distinct longitudinal rows; 
ventrally bearing transverse submargi¬ 
nal segmental rows of elongate, rather 
slender spines in the abdominal region, 
these clusters more irregular in shape 
than in the thoracic region, and dor¬ 
sally with small, submedian clusters of 
similar spines the whole length of the 
body and somewhat similar marginal 
tufts corresponding segmentally with 
the median; anal ring not unusual. 
Owing to the discovery of 8 pairs of 
abdominal spiracles and of small 
clusters of spines on the dorsum of the 
abdomen, the specimens available for 
study were originally described as a 
new species, but through the great 
kindness of Professor Ferris in loaning 
the single mounted specimen of his 
