125 
bit into it at various points, and tried to unroll it with her 
stout legs and mandibles. But the enclosed locustid was “sit- 
ting tight.” At last the wasp worked a good-sized hole in the 
lower end of the leaf, and now at this opening and now at 
aperture above, inserted her abdomen and worked it about, 
evidently in an attempt to locate and sting the occupant. Finally 
she urged it out from below and it fell to the ground; at this 
point the Chlorion was disturbed and hardly followed up her suc- 
cess, but tried another 
leaf, a rolled-up green 
one from which she 
quickly expelled the 
sluggish occupant, and 
following it to the 
ground, paralyzed it 
with a sting. She flew 
with it to a tree, and 
at this juncture I cap- 
tured her. 
One of the auru- 
lentus burrows which 
I dug up was oblique 
and extended about 
two inches below the 
surface. The single 
terminal enlargement 
contained three Gryl- 
lacris, one a mature 
female, the others 
young. They were paralyzed to a degree, and the smallest had 
a freshly-hatched wasp larva feeding between the first and second 
coxae. A cocoon which I dug up was rather stout, pale brown 
and about 28 mm. long. The wasp frequently excavates in de- 
cidedly hard ground. 
Male aurulentus are sometimes taken at the flowers of Premna 
odorata, a verbenaceous tree. 

Fig. 61. Chlorion wmbrosus, var. plumiferus, 
ON ON 2: 
Chlorion umbrosus (Christ) var. plumiferus Costa. 
Length 29 mm.; black; silvery hair on head and thorax, wings 
nearly clear. 
Probably the best known oriental Chlorion (Fig. 61) and one 
of very wide distribution. 
At Los Banos it was the commonest of the big wasps and 
