PARASITES OF LARGER BROWN-TAIL CATERPILLARS. 
303 
as satisfactory, so far as known, as those attending the colonization 
of Pales and Zygo- 
bothria, and it is 
hoped that it may be 
recovered in the 
course of 1911 or 
112 te, ateo 
hoped that a large 
number will be im- 
ported in 1911. 
MASICERA SYLVATICA 
FAL. 
This tachinid ap- 
pears not to be un- 
common as a parasite 
of the  brown-tail 
moth in Italy, but 
has not been received 
from other countries 
in more than the most 
insignificant num- 
» LAIIWWIISS 
= 
ae 
= 
== WG 
= ail! Vl. 
—, BS 
nS 
~ 
Fig. 73.—Eudoromyia magnicornis: Adult female, with front and side 
views of head at right. 
Much enlarged. (Original.) 
bers. Not enough have been received to make anything like colo- 
nization possible, and it is one of the species which it is hoped to 
Mt 
il 
I 
\ 
| 
Mf 
ae Ned til 
Fia.74.—Eudoromyia magnicornis: a, First- 
Stage maggot attached to leaf, awaiting 
approach of a caterpillar; b, mouth-hook 
ofmaggot. a, Greatly enlarged; b, highly 
magnified, 
(From Townsend.) 
receive in 1911. 
EUDOROMYIA MAGNICORNIS ZETT. 
This (see fig. 73) is the most distine- 
tive of the tachinid flies parasitic upon 
the brown-tail moth, and the only one 
among the parasites of either the gipsy 
moth or the brown-tail moth which has 
the habit of depositing its active larve 
upon the food-plant of its host. This 
habit was first discovered by Mr. 
Townsend, who gives an account of 
the manner of the discovery in Techni- 
cal Series VI, part 12, of this bureau, 
from which the accompanying figure 
(fig. 74) was taken. 
It is another of the group of tachinid 
parasites which appear to be southern 
rather than northern in distribution, 
on account of which it has been found 
impossible to secure a sufficient number to make adequate colonies 
