376 
Journal of Agricultural Research 
Vol. XI, No. 8 
When the larva is ready for pupation, it tunnels its way to a point near 
the surface, enlarges the cavity slightly, and completely surrounds itself 
with a sort of cell, or cocoon, composed of shreds and pellets of wood, 
tightly glued together. After making the cocoon, the larva ceases feeding, 
shrinks slightly, and molts, transforming to the pupal stage. 
resistance or the larva to injuries 
While the larva of the three-lined fig-tree borer is soft bodied, and 
easily injured when removed from the protecting fig wood, its resistance 
to knife cuts and similar mechanical injury is great, as specimens cut so 
severely as to cause the loss of a considerable quantity of body fluid will 
often entirely recover and complete their development. Thus, one speci¬ 
men which was cut nearly in two and had lost much of the body fluid 
recovered and reached the adult stage in the usual time, as did several 
others with injuries only slightly less severe. On one occasion, when a 
large-sized borer was chewed nearly in two and lost one of its mandibles 
as the result of meeting another borer in the wood, both wounds com¬ 
pletely healed and- the insect survived for more than a month. During 
this time the body cavity was closed by a thin, transparent membrane. 
The borer was, of course, unable to feed. A glossy black scab usually 
forms over a cut or abrasion in the larval skin. Infections often occur 
through abrasions, and this was the principal cause of the loss of injured 
specimens in the rearing work. 
THE PUPA 
DESCRIPTION 
The pupa (PI. 35, D, E) on first emerging is creamy-white, but soon 
takes on more yellow and develops a brown shading on the feet, the tips 
of the antennae, and the mouth parts. As development progresses the 
eyes and mandibles turn amber-brown, then the prothorax, head, anten¬ 
nae, sides of abdomen, and tips of wings take on similar coloring. The 
size varies slightly in the sexes and in different specimens of the same sex. 
The length ranges from approximately 0.78 to 1.06 inches (20 to 27 mm.), 
with an average of approximately 0.94 inch (24.06 mm.); the breadth of 
the thorax from approximately 0.19 to 0.23 inch (5 to 6 mm.), with an 
average of approximately 0.21 inch (5.5 mm.); that of the abdomen from 
about 0.22 to 0.29 inch (5.75 to 7.50 mm.), with an average of approxi¬ 
mately 0.23 inch (6.5 mm.). The antennae are 11-jointed but, owing to 
the fusion of the second and third joints, there appear to be only 10. 
They are directed backward along the sides of the body, the last seven 
joints resting curled together against the wing. The wings extend back¬ 
ward and downward under the abdomen, their tips reaching almost to 
the hind margin of the second abdominal segment. On each side of the 
dorsum of the prothorax are 16 small brown setae or hairs arranged as 
follows: 1 long hair near the middorsal line near the front margin, 2 loose 
patches of 5 smaller hairs on the middle portion of each half of the prono- 
