480 
The Ohio Naturalist. 
[Vol. XII, No. 5, 
a small rounded mass; runs in a narrow median line back to seg- 
ment 5 ; forks around the first division of the heart line ; and thence 
the forks extend as broader and broader lines to the posterior end 
of the body. In each segment back of 5 these forks are connected 
by a whitish bar, already mentioned, just beneath the two median 
segmental bristles ; and more or less by scattered brownish globules 
between the dorsal segmental bristles. 
These bundles of fat, and consequently the amount of brown 
color, vary considerably in extent in different individuals, or at 
different times in the same individual. Frequently they cover the 
entire dorsum except the blood-vessel in segments 10, 11, 12. 
Usually anterior to this the black body-fluid appears again next 
the surface in the lateral pockets, already described, entirely 
surrounded and somewhat interrupted by the adipose mass. The 
sides of the body appear yellowish white. 
When magnified the entire dorsum of the larva is seen to be 
covered with short, close set black spines. The segmental bristles 
are larger, but light in color and not conspicuous, about equal in 
size, situated on slight elevations. Ten of the body segments 
show twelve such bristles, situated as previously described in 
Paragus bicolor.* 
The posterior breathing appendages on the dorsum of the last 
segment, (Figs. 46, c; 49; and 50) are short (0.2-0.25 mm. long) 
and nearly twice as broad (0.4-0. 5 mm) ; divergent for half their 
length; the dorsal spiracular spines (Figs. 49 and 50, a) moderately 
long, sharply conical, with a very small lateral sub-basal spur. 
The six elongate spiracles ( b ) are irregularly and considerably 
curved, about 0.2-0.25 mm. long, the median one on each side 
nearer to the ventral than to the dorsal one. 
The anterior prothoraeic spiracles on the third segment 
(Figs. 46, b ; 47, a) are small, sub-crescent shaped, the lip of the 
spiracle marked by nine rounded, tooth-like lobes, (Fig. 48). 
The head segments bear antennay (Figs. 46, a; 47, b ) and 
mouth parts (Fig. 47, c, d, e ). The antennae are short, fleshy, 
rudimentary. The mouth parts consist of the usual pair of beak- 
like jaws (c, d) and three pairs of mouth-hooks ( e ). The jaws are 
V-shaped, sharp, slightly hooked at the tip, somewhat shorter than 
usual, the dorsal extending slightly beyond the ventral when 
apposed. The latter has a ventrally projecting basal spur on 
each side. The mouth hooklets are unequal in size the outer pair 
largest’; the other two pairs are situated close beside the jaws, 
the dorsal ones heavier, the ventral pair small, slender. 
To the mouth parts is attached internally a complex system 
of strong muscles and a broad, chitinous, oesophageal framework 
(Fig. 51, d). 
*The Ohio Naturalist, Vol. XII, No. 1, p. 397, Nov., 1911. 
