
424 THE AMERICAN NATURALIST. [Vor. XXXVI. 
from confinement to remain on the stalk on which it rested 
and fell to the ground, so that I could not tell how it would 
have arranged the eggs under normal circumstances. These 
repagula I find to be in all probability abortive eggs, since 
dissection shows that some of the tubules of the ovary pro- 
duce eggs, and others repagula. 
The eggs hatch after nine to ten days. The young larva 
remains quiet a day or two, after which it seeks the ground. 
The larva, while growing in size, always 
retains the form shown in Fig. 4, except that 
after hatching and after each moult the head 
is proportionally larger. It hides in some 
slight depression or under the edge of a 
stone, with its body covered with sand and 
its mandibles widely extended so as to touch 
the fringe of hairs on each side of the head. 
Its brown color simulates the surroundings. 
Its body is hidden by the covering of sand, 
and the head is somewhat concealed by its 
f peculiar covering of hairs (Figs. 4, 5, 12), so 
? 1 that small insects may crawl, unawares, too 
a 

yf near the extended mandibles, In this case 
ii the larva thrusts out its head and snaps the 
Fic.3.— Ulula hyalina, Mandibles together, pinioning the victim on 
cade. the curved points. It then proceeds to suck 
the arrangement of the Out the juices of its prey like an ant-lion. In 
ber itii the latter this is accomplished, according 
gear peut ad to Redtenbacher, by the expansion of the 
~ pharynx, the juices passing through the 
duct formed by the mandible and maxilla fitting together 
(Fig. 6). The wound is kept open by the maxilla working like 
a piston in the groove of the mandible. The palpi at the same 
time move back and forth slightly. The labium and ligula 
are folded back into the mouth and adhere together so as to 
close the orifice in front. I have observed that the Ulula 
larva soon kills its victim, and at intervals opens its mandibles 
slightly, until one of them comes out, and then sticks it into a 
new place. This is continued until the skin is sucked dry, 

