Article beginning on page 258.
Psyche 6:258, 1891.

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[April 1891.
EXPLANATION OF PLATE 7.
.
Fig. I. Cluster of oenocytes from a
nearly mature Phryganeid larva. o,
oenocytes ; t, large tracheal branch ; tt, smaller tracheal ramifications; h, tra-
cheal hypodermis.
Fig. 2. A nearly mature embryo of
Xijhidium ensiferum. 00, oenocyte
clusters seen from the surface through
the integument ; a, pleut-opodiuin of the right side (appendage of the first ab-
dominal segment) ; s, styli (belonging
to the ninth abdominal segment; the
specimen being a male) ; c, cerci.
Fig. 3. Part of a transverse section
through the first abdominal segment of
a young embryo of Blattu ( PhyUodro-
mid) germanica. *v, pleural ectoderm ;
o, oenocytes ; a, pleuropodium ; i, coel- omic cavity; a, entoderm ; w, nerve-
cord ; e, fat-body ; 6, blood-corpuscle ; d, diverticulum of the coelomic wall,
which in appendage-bearing segments
becomes converted into the limb-muscu-
lature but in this segment atrophies.
Fig. 4. Part of a transverse section
through one of the abdominal segments
of a Riasturus nymph ; o, oenocytes ;
A&, hypodermal cells ; Y, chitinous cu-
ticle ; ee, fat-body ; 66, blood-corpus- cles ; m, tergo-sternal muscles ; n,
muscles in cross-section.
TACHINID PARASITE OF
EUCATERVA VARIARIA GROTE, AND
OTHER NOTES.
BY C. H. TYLER TOWNSEND, LAS CRUCES, N. MEX. Along the arroyos on the mesa-lands,
and near the bases of mountain ranges,
in southern New Mexico, may be found
growing large tree-like shrubs, with
willow-like leaves, and bearing in spring numbers of rather large pink flowers,
which are followed by catalpa-like seed- pods. This is known to botanists as
Chilofsis sa@a.* In August these
shrubs are well stocked with the co-
coons of a moth, Eucaterva variaria
Grote, the larvae of which feed upon
the leaves. The identification was made
by Dr. Henry Skinner, to whom I sent
a specimen of the moth. The cocoons
are very lightly spun of silk, binding
*I am indebted to Professor E. 0. Wooton, of the New Mexico Agricultural College. for the name. the leaves together to form a part of
them, and are formed on the terminal
shoots. From one of these cocoons,
there issued, about the 4th or 5th of
September, a f specimen of a Tachi-
nid, which I can in no way distinguish
from the J of Hyphantro-phaga hy-
å´phantria Twns. The parasite issued
without going into earth, as there was
none of the latter in the jar in which
the cocoons were placed, but came
directly from the cocoon of the moth,
in which, if I remember rightly, the
puparium of the Tachinid was found.
This is quite a different habit from that possessed by those members of the same
species which parasitize the Fall web-
worn1 ; perhaps the latter individuals
Psiche 6 238-259 tprc.1903). htlp:/lpsychmilclub org/&'6-258 html



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April 1892. J PSYCHE. 259
emerge from the earth solely because the Hyphantria cocoons are placed therein,
though I have found the puparium
separate from the cocoon in the earth.
Mr. Harrison G. Dyar, to whom I
sent one of the Eucaterva cocoons from
which the moth had emerged, wrote me
as follows concerning two Tachinid
eggs which he found within it, and
which are doubtless those of the above
species :
"There were two eggs of Tachina upon the cast skin contained in the cocoon, and both had hatched but apparently had failed to enter the larva. Probably they are eggs of the species of Tachina you have bred from the cocoons. They are elliptic ovate in out- line, flat below and rounded above, smooth shining white.
Under the microscope, they
appear very faintly divided into minute hex- agonal or circular areas. Length 0.6 mm., width 0.3 mm.
"The larvae had hatched by breaking a
piece off of the pointed end.
The eggs had
been placed upon the body of the caterpillar, not on the head."
Melgenia websten' Twns., Can.
entom.. xxiii, 206.
This species was
recorded as bred from a chrysalis.
Professor Webster sent me a portion of
the chrysalis, and it has since been
determined, by Dr. Henry Skinner, as
belonging to Pyrameis cardui. Re-
garding the generic position of this
Tachinid, it does not belong in Mei-
genia. The best place to which I can,
with my present knowlege, relegate it,
is in the genus Prospherysa v. d. W.
Dr. Brauer, in a letter
to me, has re-
ferred it with a query to Achaetoneura.
Phorocera (Meigenici) pomiscua
Twns. should perhaps be referred to
the same genus as the preceding. It is
indicated by Brauer in Ziti. as belong-
ing either to Achaetoneura or Proso-
paea. If these genera can be used, it
will be well to recognize them.
Tachina clisiocam@ Twns. is re-
ferred by Brauer in lift. to Eutachina.
This I do not approve of, as there is no necessity for the creation of the new
genus Eutachina to contain the forms
referred to Tachina sensu stricto.
I would like also here to make a note
of the fact that Dr. Brauer informs me
by letter, as also in a note of his in the Sitzungsber. k. k. z001.-bot. gesellsch. Wien, of May, 1891, that he first called attention to the relationship of the Oes- tridae with the Muscidae in 1858, in the Verh. zoo1.-bot. gesellsch. I wish,
therefore, to correct my statement in
the Proc. ent. soc. Washn. ii, 90, that
this view was first advanced by Loew.
THE LARVA OF SARROTHRIPA REVEYANA.
BY HARRISON G. DYAR, YOSEMITE, CAL.
The larva of this species occurred season in August and I obtained them abundantly on poplar at Yosemite, Cal., at this time in 1889 and 1891. When
in July.
The moths emerged the same I first noticed the larvae living grega-



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