Article beginning on page 273.
Psyche 7:273, 1894.

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Augrat 1~95.1 PSYCHE. 273
emerged and died, being discovered
April 2, 1893. On April 3, 1893, all
of the reniciining galls were opened
Every one contained an insect, either as adult, pupa, or in one case (that of the smallest gall only 3 mm. in diameter)
ii small shrivelled larva. The occu-
pants were as follows : Dead adults
(including tlic two that had emerged),
12; live adults, 6 ; pupae, 18; larva, I. The pupa usually bears the cast larval
skin attached dorsally to the anal ex-
tremity.
The gall-fly is 4 to 44 mm. long.
The whole insect is black, except
the abdomen and legs which are
orange-red. Wings subhyaline, shaded
with fuscous. It is a notable fact that
no sign of a parasite was discovered in
all of these galls.
I am indebted to Mr. Win. H. Ash-
mead for identifying the Rhodites. It
is a very pretty species. The abdomen
changes to a dark but very highly
polished brown in dried specimens.
THE HOMBYLFD GENUS ACREOTRICl-IUS IN AMERICA. BY D. W. COQIJILLETT, WASHINGTON, D. C.
For scvcral yen-is past the writer
has enjoyed the privilege of examining
many interesting forms of Diptci-a taken by Prof. 0. B, Johnson in various parts
of the state of Washington, and several
of these have been made known from
time to time in our various cntomo-
logical journals. Among a lecent
sending is a single specimen belonging
to the Bomb> lid genus Acreotriciius
of Macquiirt, heretofore known only
from Austra1i.t. It is closely related
to the genus Phthiria, differing in the
structure of the antennae and in the
densely hairy face. The species is as
follows :
Arreotrichits americaiius n. sp. 8.
Black,
including the pitlpi and knob of hsiltcis, ouly the stem 01 tlic hitter is yellow. Ejes contiguous, frontal triangle and face gixy pollinose, face and underside of head
densely long black pilose. Antennae slightly longer than the head, first joint twice as long but not wider than the second, the
latter us broad as long, both densely long black pilose; third joint slightly over twice as long as the first, at its base narrower Limn the second joint, continnlng slender nearly to the middle, then rather suddenly expanding- to nearly twice its foimer width, the gieatest expansion being on its upper side, then tapering quite suddenly to the tip which is blunt; a short, blunt-pointed style on the upper side of this joint a short distance before the sipex; on the upper e<ige of the expanded portion of this joint are five black bristly hairs, each'nearly half as long as the joint itself. Proboscis as long as the head and thorax taken together, the labella very IIEIITOW; palpi filiforin, two- fifths as long aa the proboscis. Thorax
velvety, the front corners, sides and pleura gray pollinose, its pile black; scutelliim velvety, densely black pilose. Abdomen
velvety, its pile light yellowish. Wings hyaline, stigma yellow, second snbrnargi~iiil cell not appendiculate, small crossvein
scarcely bevond the middle of the discal cell. Length 7 mm. Washington. A single
specimen captured April 4, 1804 (0. B.
Johnson).




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