91 
4. The Raspberry Plume Moth. 
(Oxyptilus delavaricus, Zeller.) 
Order Lepidoptera. Family Pterophorime. 
i. 
(Plate X. Fig. 2.) 
May we found occasionally at Normal, feeding upon the 
the blackberry, a very peculiar, small green larva, having 
resemblance to the raspberry slug, (Selandria ruin), but 
to the Lepidoptera. This larva, new to us when first 
was determined by breeding to be that of the plume moth, 
delavaricus, of the family Pterophoridse. 
isect has already been noticed in Saunders’ Insects In- 
• Fruits (pp. 314 and 315), where figures of the larva and 
3 given, and all these stages are briefly described, but the 
not there identified. For the determination of the speci- 
d by me I am indebted to Prof. Fernald, of Orono, Maine. 
va, when full grown, is about .4 of an inch long, of a pale 
or, sometimes slightly streaked with pale yellow; with a 
nsverse row of six large tubercles to each segment, each 
rearing a spreading cluster of stiff spines which are slightly 
te at their tips. The dorsal rows of tubercles are larger 
;e upon the sides, and the spines upon the former (six or 
number) are likewise the longest of all. Scattered spines 
r elsewhere on the body. 
olegs of this larva are of very unusual form. They arise 
k wart-like bases, and extend downward a distance equal 
irds the depth of the body, as smooth, straight, slender, 
appendages, which expand suddenly at their tips. The 
pair of these prolegs, however, thicker than the others, are 
h spines. 
rsal joints of the articulated legs are similarly slender, 
and elongate, and each terminates with a movable claw 
)f shutting back against the tip of the extremity. 
ad is yellowish, smooth, with a few long bristles in front, 
irts dusky, thoracic legs nearly black, the abdominal pro- 
at base, but rapidly darkening and becoming black on the 
If. 
ipa is green when fresh, angular, margined on each side 
Vliitish ridge, and with a double row of clusters of stout 
spines along the back. The abdomen is slender and acute; 
pads extend three-fourths the length of the body, the head. 
lx being decurved so as to give the front of the pupa an 
truncate outline. The back of the thorax is beset with 
3 nder simple spines; wing pads and under surface of the 
>oth except for a thick transverse tuft of hairs upon the 
r the under side of the abdomen, a short distance behind 
f the wing pads. 
8 mm. 
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