Vol.. 8, 1922 
ZOOLOGY: L. 0. HOWARD 
137 
Predators (Cont'd) 
HOST FOR WHICH 
IMPORTED 
NAME OF PARASITE 
Calosoma sycophanta 
L. 
Calosoma sycophanta 
L. 
Calosoma sycophanta 
L. 
AMERICAN SPECIES 
ATTACKED 
Malacosoma ameri- 
cana Fab. 
Malacosoma disstria 
Hiibn. 
Geometrid sp. 
COMMENT ON ABUN- 
DANCE 
Rare 
Common 
Common 
This predator does not refuse or hesitate to attack any species of Lepi- 
dopterous larvae ordinarily met on tree growth during the summer months 
at the time of its abundance; hence there are many other species 
that fall prey to it, the names of which are not yet recorded. Several 
species of Lepidopterous larvae have been offered as food to the beetles 
in jars and cages which were readily consumed by them but are not re- 
corded above. 
Predators (Cont'd) 
HOST FOR WHICH IM- 
PORTED 
Porthetria dispar 
L., and Euproc- 
tis chrysorrhoea 
L. 
NAME OF PARASITE 
Carabus auratus L. 
Carabus auratus L. 
AMERICAN SPECIES AT- 
TACKED 
Gray field slug (A^- 
riolimax agrestis 
Noctuid sp. (Ground 
cutworms) 
COMMENT ON ABUN- 
DANCE 
Apparently 
important 
Apparently 
important 
This Carabid undoubtedly devours other species of soft-bodied insects 
ordinarily found in or near the ground. 
Of these, it will be seen that the Tachinid fly Compsihira concinnata 
has readily accommodated itself to a number of native injurious species 
and that it is an introduction which is of great importance entirely aside 
from^its efficiency as a parasite of the brown-tail moth. 
It seems reasonably certain also that the little Braconid Apanteles 
lacteicolor is a species which will prove to have a very broad value. In 
addition to the records already given, I am informed by Mr. R. T. Webber 
of the Gipsy Moth Laboratory that the Tachinid mentioned is also probably 
a parasite on the larva of Cimhex americana (a sawfly) and on two other, 
unidentified sawflies; while Mr. C. W. Johnson, Curator of the Boston 
Society of Natural History, has noted an apparent parasitism of this spe- 
cies on the pine weevil {Pissodes strohi). 
A most useful feature in the biology of the Tachinid fly is that with the 
larger caterpillar hosts the third stage of growth is the one in which they 
are nearly always attacked, which allows their Microgaster parasites to 
develop and emerge without having to struggle against a simultaneous 
parasitism by the Tachinid. 
Moreover, this important imported Tachinid has not only spread all 
