
No. 427.] HAIRS OF LEPIDOPTEROUS LARVE. 571 
is apparently entirely without cellular elements and is at the 
same time a part of the nervous system. These networks 
in tiger-moth larvae were only observed near the hair tubercles ; 
in the silkworm a much less marked network of large and 
small fibers was occasionally found. 
It is hard to say whether this network is truly a part of the 
nervous system or not; but in any case these networks are 

Fic. 9. — Nerve plexus from edge of hair tubercle of tiger-moth larva, much enlarged. 
Methylen blue. 
not at all like the multipolar cells just described, no nuclei or 
cells being recognized, but they are well stained with methylen 
blue and join undoubted nerves. 
CENTRAL ENDING OF SENSORY NERVES. 
It was not the purpose of this investigation to make a study 
of the central nervous system, but as it became necessary 
to trace the nerve fibers to the ganglia, several interesting 
conditions were noticed which have a more or less direct bear- 
ing upon the previous work; a few of these will be spoken of, 
although it is realized that no complete discussion can be given 
without considerable further study, and consequently further 
