(3380 >»: REPoRT OF THE ENTOMOLOGISTS OF THE |” 
past.:.Two tubercles, nearly white with dark colored tips, are 
‘conspicuous on the lateral margins of the first two abdominal seg- 
ments. At the tip of the abdomen is a disc covered with a sticky 
substance which is used both as an aid in crawling about and to 
hold tothe support when necessary. This is especially true with 
the newly-hatched larve. Its chief office, however, appears to 
‘be as a means of attaching the larve to the leaf when about to 
pupate and to hold the suspended pupa until the beetle emerges. 
The larvee are mature in about two weeks. 
Habits of the larva.— The newly-hatched larve remain. for a 
few hours crawling about over the empty egg shells, but soon 
settle down in the immediate vicinity and begin gnawing through 
the epidermis to feed on the soft tissues beneath. They feed side 
by side for three or four days, finally separating to feed independ- 
ently on different parts of the leaf. As they grow older and 
stronger they devour the entire leaf with the exception of the 
midrib and larger veins. (Plate XX, Figure 1.) | Re 
In several cases under observation the eggs had been placed o on 
old leaves and the young larvex, not finding tender food, migrated 
to the tips of the shoots to feed on the tender leaves and bark thus 
causing the same injury as the beetles. 
The larve are full grown in from 10 to 15 days and, after re- 
maining comparatively inactive for a day or two, prepare for pupa- 
tion. Plate XX, Figure 2, is from a photograph of a larva, 
natural size, and enlarged.’ | 
Pupation.— Pupation takes place above ground. When aback 
to pupate, the larva attaches itself to the leaf by means of the 
sticky disc at the tip of the abdomen and allows its body to hang 
down. The head is gradually bent forward and the legs drawn 
up to the body. The transformation from the larva to the pupa 
takes place in a few hours. The bare is retained in the larva 
skin. | 
The pupa. — The pup are familiarly known among the willow 
_pupated. growers as “hangers.” Usually all of the first brood 
elk by, J une 10. The pupe are attached promiscuously to the 
