1929] 
The Biology of Two Cixiid Plant-Hoppers 
285 
(These “tails” were often larger than insect itself). They 
were always in or near the silk material first noticed. A 
number were found arranged in a linear series along a root 
of about 3/16" diameter; the root for a length of 4" being 
covered with their silk masses. The arrangement seemed to 
be perfect that the older nymphs were at that end of the 
root lower in the soil and towards the ant nest — the 
younger nearer to the surface of the ground and farther 
from the nest. Ants well in attendance and in two places of 
this series a large drop of clear yellowish fluid, sweet to the 
taste, was found. This particular root was about 3 inches 
below the surface of the soil running almost horizontal but 
a little higher towards the hill. Most of the nymphs found 
were thus situated, under the ground, but two chambers 
were found in a cavity in the rotten stump at about the 
surface of the ground but covered with trash of dead leaves 
etc., and in the dirt and debris of very rotton wood. Roots 
of a small vine twining around the stump passed close to 
the chambers. 
“That the ants attended the nymphs is without doubt. 
Not a single nymph of about 30 was out of the company of 
ants, and one found under a bit of rotton log about 3' away 
as well as one found through on the other side of the stump 
had ants in attendance. 
“Nymphs were active when disturbed and could 
jump quite well.” 
In the same nest was a tiny but advanced nymph of 
another species of Cixiid (?) with no signs of a flocculent 
tail-appendage. 
The next day another nest of the same ant species was 
found under a log in the same general locality. We exposed 
a gallery along a root inch thick and exuding a milky 
juice when cut. In this gallery were numerous nymphs of 
Mnemosyne and several more of the much smaller Cixiid 
(?). When the ants were disturbed by the digging they be- 
came very much entangled in the flocculent material se- 
creted by the plant-hopper nymphs. In the same gallery 
