256 
Psyche 
[June 
Figure 2. Lateral view of an exuvia of fVilliamsonia lintneri, male, 
showing dorsal spines on abdominal segments 3 through 9 and the con- 
spicuous setae on segment 9. 
Figure 3. Labium of the nymph of fVilliamsonia linteri. 
the third and fourth setae from the proximal end. The distal margin 
of the palpus possesses seven or eight crenulations which become 
progressively deeper near the movable hook. Each crenulation except 
that nearest the movable hook usually bears two spiniform setae of 
unequal length. The inner margin of the palpus near the apex has 
about ten irregularly placed spiniform setae, which are directed 
inward. The legs are uniform in color with relatively few setae 
except on the middle and hind tibiae. The setae on the hind tibiae 
are arranged in two rows with the posterior one being more promi- 
nent. 
