ES HEELS, 321 
to the front of the third abdominal seg- 
ment, and then abruptly retrace their 
course. They are exceedingly delicate, 
being only 0.045 mm. in width, and are 
ribbons rather than cords; in their deli- 
acy and slight development, but not at 
all in the characteristics of their origin, 
they agree with Euphoeades troilus. 
Nervous system. ‘The first body-gang- 
lion is separated from the suboesoph- 
ageal ganglion by a narrow space, not 
length of the 
former, which is somewhat longer than 
The fourth body, or the first 
more than one-third the 
broad. 
abdominal ganglion is separated from the 
one in front by less than the diameter of 
the latter, and is situated wholly within. 
but at the hinder border of, the third 
thoracic segment; the other ganglia, 
even the third thoracic, are situated in 
the middle of their respective segments ; 
the last two ganglia are completely amal- 
gamated, forming a single, subfusiform; 
oval mass more than twice as long as 
broad, slightly broader than and nearly 
twice as long as the ninth ganglion. ‘The 
cords between the ganglia are quite dis- 
tinct from each other in front of each 
ganglion for one-third or one-fourth the 
distance to the ganglion next in advance ; 
in front of this they are attingent and 
apparently consolidated, although it can 
be seen that the ribbon is composed of 
two elements. The lateral nerves con- 
sist of a single thread issuing from the 
anterior outer angle of the ganglion, 
directed laterally and a little forward ; 
and a pair, issuing separately, but in 
close proximity. from the posterior outer 
angle, and directed laterally and some- 
what posteriorly ; these last are aiso very 
slightly divergent. 
Silk vessels. 
a long thread-like tube or duet, 0.9 min. 
These consist, first. of 
in diameter, having a slightly tortuous 
course through the thoracic segments ; 
and second, of a larger vessel, a mere 
enlargement of the tube, which commen- 
ces to expand as it enters the abdominal 
region, and continues of the same diam- 
eter, 0.5 mm., as far as the beginning of 
the fifth abdominal segment, then turns 
abruptly back upon itself, outside its 
former course, as far as the front of the 
second abdominal segment; again turns 
back with equal abruptness, outside or 
ubove its previous course, and, dimin- 
ished to nearly one-half its former diam- 
eter, extends nearly to the middle of the 
third abdominal segment; it then turns 
upward at right angles along the walls 
of the stomach to the middle of the sides 
of the same, or a little higher, and again 
resumes its general backward direction ; 
on this it extends, with a slightly wavy 
course, as far as the end of the stomach, 
when it turns downward and inward again 
and soon terminates ina blunt tip, its ex- 
tremity scarcely slenderer than its width 
when it is freed from the coils on the 
sides of the stomach. The coiled or re- 
versed portion covers a distance of 5.75 
mm. “The initial duct is 9.5 mm. long, 
the stouter part of the vessel 12 mm. 
long, and the slender terminal portion 
11.5 mm. long. 
The testes 
consist of a pair of quadrilobed, elon- 
Mule reproductive organs. 
gated, subrenifurm organs, terminating 
anteriorly in a little thread less than half 
as long as themselves; and are situated 
scarcely. behind the middle of the fifth 
abdominal segment. 
| End. | 
