174 
Psyche 
[Sept.-Dee. 
Length 36 mm., width 10 mm. Dorsum somewhat flattened, 
broadly convex, the surface slightly coriaceous, lateral keels 
thin with pores on upper surface. First segment with lateral 
limits extending somewhat further ventrad than in any species 
of related genera, much exceeding the keels of the ensuing seg- 
ments. 
Gonopods of the form shown in figure 5, a and b with the 
apical arms crossing each other when at rest. 
Fig. 5. Stelgipus agrestis. a , Right gonopod, posterior view; b, Right gonopod, 
mesial view. 
Basal joint of legs behind middle of body with a small acute 
apical tooth below; second joint of all legs with the usual disto- 
ventral spine well developed. 
Sternum between the third legs narrow and occupied by two 
small, round, contiguous tubercles; fourth sternum wider, with 
two small conic tubercles slightly separated and bearing one or 
two stiff setae; ensuing sterna wider and without tubercles; all 
sterna from segment 4 to the middle of the body with a trans- 
verse oval area containing a few small setae; from segment 8 
caudad the posterior sterna have a small, broadly conic tubercle 
near each leg, the anterior sterna with smaller tubercles only on 
segments behind the middle of the body; sterna behind the 
gonopods slightly narrower than in related genera. 
A 
B 
