THE BEOAD-BEAN WEEVIL. 
61 
THE EGG. 
The eggs are deposited upon the outside of the pod, usually without 
reference to the position of the young beans, and are firmly attached to 
the epidermis by a glutinous, adhesive secretion, which usually remains 
as an enveloping border or fringe, as shown in figures 1 3 and 14. They 
are deposited singly over the surface 
of the pods. As many as nine may 
be deposited upon a single pod, 
although from four to six appear to 
be more usual in the cases observed. 
The egg is elliptical-ovate, about 
twice as long as wide, rounded at 
the extremities, and somewhat more 
pointed anteriorly. The surface is 
smooth and polished, without visi- 
ble sculpture. In color it is clear 
greenish yellow when fresh, but just 
before hatching the dark head of the 
Fig. 13.— The broad-bean weevil: Photo- 
micrograph of egg. (Original.) 
embryonic larva becomes plainly 
visible through the thin shell. It is 0.55 to 0.60 mm. in length by 
0.25 to 0.28 mm. in width. 
The description of the egg was made from specimens just before 
hatching and the greenish color may have been absorbed from 
beneath, since Mr. Condit states that the egg when first seen is 
watery white, glistening in the light. It is large and, like the eggs 
of our other injurious Lariidae, plainly visible to the unaided eye. 
THE POSTEMBRYONIC LARVA. 
The young larva 
emerges through a 
round hole in the un- 
derside of the egg and 
bores at once into the 
young beans, going 
directly through the 
pod. 
When first hatched it is pale yellow, with brown- 
ish or blackish head and mouth-parts. Except in the shape of the 
prothoracic spinous processes, it differs little from the larva of 
the pea weevil (Laria pisorum L.). These processes are shown in 
figure 15. 
Fig. 14.— The broad-bean 
weevil: Egg. Greatly 
enlarged. (Original.) 
Fig. 15.— The broad-bean weevil: Api- 
cal crest of head of postembryonic 
larva. Greatly enlarged. (Original.) 
