72 Psyche 
f, exterior view of midgut at sphinc- 
ter; and cells of epithelium. More 
enlarged. Dark portion posterior, 
light portion anterior gut. 
g, part of malpighian tube of nymph, 
junction of smooth and lobed parts. 
h, the same, more enlarged. 
3, 
Longitudinal section through pouch and 
part of cesophagus and sac. Only 
two malpighian tubes shown fully. 
Transverse section through pouch; 
both sections are slightly diagram- 
matic. 
i, ventral view of part of zigzag of mid- 
gut. 
k, lateral view of part of a malpighian 
tube. 
4. 
To left, adult salivary glands; to right, 
nymphal glands. 
5. 
Alimentary canal of Cicada. 
6. 
Alimentary canal of Psyllid. 
Us 
a, diagrammatic transverse section of 
s 
nymph of Cercopid feeding on 
rootlet. 
b, diagrammatic transverse section of 
adult abdomen. 
LETTERING OF FIGURES. 
a=anus. 
ac=air-chamber. 
ag=abdominal salivary gland. 
ale=parts of midgut enclosed in pouch. 
am=ascending midgut. 
amp=ascending malpighian tube. 
boe=base of cesophagus and upper part 
of sac. 
c=exterior cavity of pouch or divertic- 
ulum of midgut. 
[April 
ca=cayity of abdomen. 
es=constriction of midgut sphincter. 
d=dorsal part of abdomen. 
dm=descending midgut. 
dmp= descending malpighian tube. 
dr= descending rectum. 
ep=epithelium of pouch. 
ex=external wall of pouch. 
f=fat-cells bounding aperture between 
pouch and sae. 
fe=filter-chamber or diverticulum or 
pouch. 
hg=gland of salivary reservoir in head. 
id=interior cavity of pouch. 
Im=longitudinal muscles. 
m=muscle connecting cesophagus and 
sac. 
mi= midgut. 
miv=midgut valve or aperture between 
pouch and sae. 
mp =malpighian tubes. 
ms=mucinoid secretion. 
n=nucleus. 
ce = cesophagus. 
cev =cesophageal valve. 
p=peritoneal membrane. 
p!=pleurum. 
r=rectum. 
rd=salivary reservoir duct. 
re=salivary reservoir. 
ro=rootlet of plant. 
rv=rectal valve. 
s=spume or froth of nymph. 
sd=salivary gland duct. 
se = sternite. 
so=slitlike opening to exterior cavity of 
pouch. 
sp=salivary syringe or pump. 
spe=spiracle. 
te=tergite. 
tg=thoracic salivary gland. 
tm=transverse muscles. 
tr=trachea. 
