320 PSTCIHE, 
on the other, and these seem to be the in other species from the cord itself just 
only nerves emitted. 
There are two sets of lateral nerves 
to each ganglion ; the posterior originates 
at the posterior outer side and is di- 
rected outward avd somewhat backward ; 
it forks very shortly beyond its origin, 
sometimes, in the anterior part of the 
body, at the very origin; the anterior 
set consists of two parallel nerves, which 
start. the the 
outer side, the posterior from near the 
anterior from anterior 
middle of the outer margin, and extend 
outward at right angles to the cord; the 
anterior of these parallel nerves is some- 
times connected, just beyond its base, 
with the cord just in advance of the 
ganglia; at least it is so in the seventh 
abdominal segment where the nerves are 
somewhat modified; this anterior nerve 
may be the same as that which originates 
in advance of the ganglia. 
The initial duct of 
runs to the middle of 
beyoud 
Glandular system. 
the silk vessels 
the first 
which it expands to a vessel 0.65 mm. 
abdominal segment, 
broad, which runs straight along the 
ventral surface to the front part of the 
third abdominal segment, turns abruptly 
back to the origin of the thicker portion. 
then bends at right angles and runs in a 
vermiform course upward along the first 
and second abdominal segments and ter- 
The whole of 
the thicker part of the vessel is 21 mm. 
minates upon the back. 
long. 
The testes 
are situated at the posterior part of the 
Male generative organs. 
dorsum of the fifth abdominal segment. 
are plump. obovate. well rounded, 1.1 
mm. long and 0.85 mm. broad. 
ll. THE LARVA OF EPARGYREUS TITYRUS, OF NORTH AMERICA, 
Digestive system. As in Euphoeades 
troilus the stomach is very large as com- 
pared with the rest of the alimentary 
canal; it measures 19.5 mm. in length. 
while the crop measures 3.5 and the in- 
testine and colon together 5 mm.; the 
oesophagus proper is exceedingly short. 
The salivary glands are slender, crinkled 
ribbons of uniform diameter (0.14 mm.) 
and 5 mm. long, reaching to the front of 
the stomach, where the extremity is at- 
tached by a very slender, pellucid, sus- 
pensory thread to tissue connected with 
the dorsal vessel. 
The malpighian vessels originate in a 
slender, thread-like tube, smaller than 
the duct of the silk vessels. from the 
constriction at the extremity of the stom- 
ach; it extends forward along the hinder 
extremity of the stomach for 1.6 mm. 
and then sends off the inferior branch, 
which passes along the stomach nearly 
to the middle of the third abdominal 
segment and there turns upon its course. 
The main stem continues for 1.25 mm. 
further before dividing, a feature in which 
this insect is entirely different from all 
the others described, and its two forks 
pass forward as usual along the sides of 
the stomach, the upper to the middle or 
slightly in advance of the middle, the 
lower (or middle of the three branches) 
eh an nek 
