124 
Psyche 
[June-Sept. 
short “rostrum” (figure 3) ; eyes one on each side, colorless; 
pseudostigmatic organs present at both ends of crista, 
setaceous; bristles of dorsum short blunt, forming a boat- 
shaped crest backed by an oval shield; thumb of palptibia 
with five bristles (figure 5) . 
Description: Size of ovigerous females: length 1.36 mm., 
breadth 0.68 mm. ; color of body vermillion, legs paler ; shape 
of body (figure 3) ovate, rather elongate, rounded behind, 
anterior end broad, with rounded “shoulders,” cephalopro- 
thorax much narrower, capable of considerable lateral re- 
traction so that in most alcoholic specimens the posterior 
half is much broader than anterior half (figure 3) , in nature 
the upper part of the cephaloprothorax is slender so that the 
lower half flares out on each side (figure 4) ; crista metopica 
extends as a slender almost undifferentiated area from 
broadest area of abdomen nearly to tip of “rostrum” where 
it divides to straddle this region (figure 4) ; both pairs of 
pseudostigmatic organs setaceous, gradually tapering but 
lined with four rows of short, crowded, black cilia ; anterior 
pair one-and-a-half times length of body bristles, posterior 
pair two to three times length of body bristles; eyes on 
transverse plane passing through center or slightly posteriad 
of center of crista, colorless, diameter equal to length of body 
bristles. 
Bristles of dorsum of body formed of an ovate, membra- 
nous plate or shield strengthened by fine radiating ribs the 
ends of which barely project beyond edge of shield. From 
the longitudinal center of this shield there springs the keel 
of a canoe-shaped crest, the edges or gunwales of which are 
studded by the protruding ribs of the boat (figures 6). 
Bristles of venter more slender, crest more slender, both 
crest and shield barbs lengthened into long spines which are 
fewer in number. These spines give the bristle the appear- 
ance of a bearded wheat head. 
Legs I a little longer than body (figure 3), other legs 
shorter; legs I with distal trochanters as long as femora; 
legs II to IV with distal trochanters shorter than femora 
and somewhat fused to femora to form a semianchylosed, 
nonfunctional joint. Leg bristles as body bristles but more 
elongate, crest more slender, parallel sided, points of barbs 
much produced as minute spines. Tarsal bristles with five 
