8 
THE ALFALFA CATERPILLAR. 
ever—were reared, while one specimen of Chalcis ovata Say (fig. 7) 
was reared from a pupa of Eurymus. It seems from this that the 
Fic. 6.—Euphoroccra claripennis, a parasite of the 
alfalfa caterpillar: Adult and enlarged antenna of 
(From Howard.) 
same; puparium. 
hymenopterous parasites 
are much in evidence, al- 
though if the material 
had not been affected by 
the supposedly contagious 
disease many more might 
have been secured. 
The cotton bollworm 
mistaken for an alfalfa 
caterpillar.—A large 
green caterpillar known 
as the bollworm, /elio- 
this obsoleta Fab. (fig. 8), 
that can be distinguished 
from the Eurymus_ be- 
cause it is of a lighter 
green color, about one- 
fourth larger, and hairy and rough in appearance rather than 
smooth, with three black lines traversing its body lengthwise, 1s quite 
prevalent in the Imperial Valley, and is often mistaken for the 
alfalfa caterpil- 
lar by many 
farmers. Mr. 
EK. O. G. Kelly 
and Mr. T. H. 
Parks, agents of 
the Bureau of 
Entomology, 
working at Wel- 
ington, Kans., in 
the summer of 
1909 also noted 
this species and 
reported it as 
being of a pre- 
daceous habit.¢ 
As noted in the 
valley, it was 
found to do very 
leucostigma) 
cs. 7.—Chaleis ovata, a parasite of the alfalfa caterpillar: 
a, Pupa; b, parasitized pupa of tussock moth (Hemerocampa 
c, adult; d, same in profile; e, pupal exuvium. 
(From Howard.) 
little damage to alfalfa, but to be a ravenous enemy of the alfalfa 
@This cannibalistic habit has also been observed in Texas by Quaintance and 
Brues. Bul. 50, Bur. Ent., U. S. Dept. Agr., pp. 79-80, 1905. 
[Cir. 133] 
