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A. W. LINDSEY 
third instar the appearance of the larva was much as in the 
second. Its general color was pale brownish, only slightly 
tinged with green. The numerous short brown secondary 
setae were scattered on the anterior third of each segment, and 
behind this arranged in five or six transverse rows, separated 
by shallow wrinkles. The setae appeared to have thick pale 
tips, again suggesting glandular structure. Diameter of head 
capsule 1.4 mm. 
In this stage the larva spun a small cocoon between a blade of 
grass and the jar in which it was kept, in preparation for its 
moult, which was begun August 5 and completed before 5:00 
p.m., August 6. 
Fourth Instar: No differences could be noted aside from the 
increased size. Diameter of head capsule 2 mm. 
On the morning of August 16 the larva had spun another co- 
coon with large open meshes, in which it completed its fourth 
moult by the morning of August 18. A few days later the ven- 
tral surface of the abdomen showed a patch of white fungus, and 
when this continued to spread the entire larva was placed in 
alcohol. 
Fifth Instar: Diameter of head 2.6 mm. The head of the 
preserved larva appeared in all ways similar to that of the fourth 
instar, as also did the body. Microscopic examination of the 
preserved specimen, however, disclosed many details which 
could not be observed with a hand lens in the field. The skin 
was found to be roughened with numerous stellate prominences, 
and the abundant secondary setae proved to be glandular or 
sensory as supposed. These setae varied roughly in accordance 
with their position on the body. On the back the short form 
(fig. 5c) predominated. Ventrad they merged into the form 
shown by figure 5b, while on the sides of the thorax the inter- 
mediate form (fig. 5a) was observed. With regard to the presence 
of primary setae little can be said which is not amply expressed 
by the maps in figure 3. The presence of secondary setae of 
ordinar}^ form on the ventral surface made it impossible to be 
certain that the prominent setae represented were really pri- 
mary. The ring-like tubercles, which show their hollow centers 
