8 
Psyche 
[Mar. 
Third joint not longer than scape ; fourth joint not 
nearly three times as long as broad 19 
19. Yellow of clypens ends below in a point; upper side 
of the triangular lateral lobes is straight ; little if 
any rufous on propodeum or abdomen 20 
Yellow of clypeus ends broadly below, and at lower 
margin; often some rufous on thorax and ab- 
domen; lateral lobes with upper side curved end- 
ing in a black comma-mark 21 
20. A row of white hair across lower face from eye to 
eye; liair-lobes very narrow; spots on scutellum; 
enclosure smooth, but anterior corners with a few 
oblique striae; sometimes lateral spots on pro- 
podeum ; venter with little if any yellow. 
femur- rub rum 
No row of white hair across lower face ; hair-lobes 
moderately broad, yellow; no spots on scutellum-; 
enclosure with median groove and each side with 
coarse oblique striae; venter with yellow bands; 
sternum with rather long, erect white hair vicina 
21. First segment of abdomen plainly longer than broad ; 
face with lateral lobes wholly pale yellowish ; pro- 
podeum reddish, smooth and shining ; clvpeal 
margin slightly rounded, pygidium slender, sides 
nearly parallel; lateral spots on venter ferruginor 
First segment not plainly longer than broad; the 
dorsal surface usually broader than long 22 
22. Third joint of antennae plainly longer than fourth, 
fourth and fifth both rufous ; clypeus projecting 
below nearly the height of lateral lobes in a short 
truncate margin; pygidium not twice as long as 
broad in middle, hind tibia has two basal teeth with 
an elongate base Isolde 
Third joint of antennae barely if any longer than 
fourth, ventral punctate areas reduced to a nar- 
row row in the middle 23 
23. Venter black, trace of rufous on the sides; clvpeal 
process truncate; propodeum, first, and base of 
second segment reddish, abdomen slender, the 
punctate side-lobes of venter much swollen so that 
