

No. 427.] HAIRS OF LEPIDOPTEROUS LARVA. 573 
tracing the nerve to the periphery it is found that part of the 
fibers of the more cephalic nerve come from the muscles, 
and so the nerve may be regarded as a mixed nerve, showing 
why some of its fibers do not follow the sensory tract. 

Fic. 13. — Section of hair from Sphinx chersis. 
In lepidopterous larvz the two sides of the ganglia seemed 
to be separate, possibly because of imperfect methylen blue 
Stain. In Coryalis larva fibers were seen to cross from side to 
side. 
GENERAL RESULTS. 
In the lepidopterous larvz examined two kinds of body sense 
hairs were found: first, simple hairs, those having a single 
enlarged hypodermal cell at the base (Fig. 12); and, second, 
glandular hairs, or those having two rather large modified hypo- 
dermal cells (Fig. 12). In the latter case the smaller cell is 
probably the trichogen cell, and the other a glandular cell of 
some sort. As these figures were drawn from specimens 
Prepared in the ordinary way, the nerves are not shown. 
Examples of simple hairs are represented by Figs. 13-18. 
The insects from which these figures were drawn are indicated 
in the explanations of the plates. Glandular hairs are repre- 
sented by Figs. 12 and r9. 
