ee Ce 
FRAGMENTS OF THE 
COARSER ANATOMY 
OF DIURNAL 
LEPIDOPTERA. 
BY SAMUEL H. 
SCUDDER, 
CAMBRIDGE, MASS. 
(Continued from p. 298.) 
8. THE LARVA OF CALLOPHRYS RUBI, OF EUROPE. 
The ventral mus- 
cular band on each side of the median 
line is treble, each division of about the 
same width as the others. 
~ Digestive system. The oesophagus 
enters the stomach with no marked crop, 
the canal only enlarging slightly to 0.2 
mm. diameter just in advance of the 
stomach, at the end of the second 
thoracic segment ; the stomach is shorter 
than usual, occupying only one-half the 
length of the entire canal and ending 
abruptly at the end of the fourth abdom- 
inal segment. It is furnished with 
longitudinal and transverse muscular 
fibres, the bands along the middle of the 
dorsum several in number and 
distinct than the others. The colon is 
much slenderer than usual, and about as 
long as the intestine. 
The salivary glands are large, broadly 
tortuous tubes, their extremities attached 
near the middle of the thorax to the dor- 
sal vessel. 
The malpighian vessels originate in a 
long and slender, slightly tapering, sub- 
cylindrical sac, 0.65 mm. long, lying 
along the side of the intestine, but at- 
tached only by the broader end ; the basal 
tube arises from the opposite extremity, 
and branches at a distance from the base 
of the tube of less than half the length 
Muscular system. 
more 
of the sac; the lateral branches are not 
very closely approximated to the stom- 
ach, somewhat irregularly directed, and 
run as far as the front of the abdomen ; 
the inferior branches extend about the 
same distance. 
Circulatory system. The dorsal vessel 
is a comparatively large and equal tube, 
running distinctly as far as the end of 
the third abdominal segment; at the 
point where the salivary glands are 
attached to it, it becomes suddenly, 
though only slightly, enlarged, and grad- 
ually tapers beyond to nearly its former 
size. 
Nervous system. The cephalic lobes 
are entirely distinct from each other, but 
in juxtaposition ; each is nearly globular, 
but a little ovate, about 0.28 mm. long, 
and as high as broad. The suboesoph- 
ageal and thoracic ganglia are as broad 
as long and of nearly the breadth of 
one of the cephalic lobes, but in the 
abdomen the ganglia grow slenderer in 
passing backward, so that at last they 
are hardly broader than the cord, and 
scarcely to be distinguished from it by 
anything more than their greater opac- 
ity and depth. The fourth and fifth 
body-ganglia are scarcely nearer together 
than the first and second, the fourth lying 
midway between the third and the sixth ; 
