Article beginning on page 158.
Psyche 6:158-159, 1891.

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158 PS2'-ck7E. [October 1891.
bottom of the brook, and by working
my fingers about in the soft mud below
them brought them out uninjured. But
great was my astonishment on opening
one of them to find within a slender, deli- cate, white larva, looking so small in pi-o- portion to the size of the tube that I could not believe it to be the maker,
till re-
searches into the other tubes revealed
similar occupants in all of
them. Fig. 23 represents
the mouth parts of one of (??#I!)
these larvae, enlarged. The ^g-
tube in the centre is the labium (spin-
naret) which spins the silken threads,
the substance used by all caddis-worms
to fasten together the materials of their houses, and fabricate
the gratings or disks
which protect them
during pupation.
These Plectroc-
nemia cases occur in
colonies, but this
spring, 189 I, I could
not find any. They
pupate in May, and
$the pupa may be
'found in a swelling
of a vertical tube
F,g. 24.
(fig. 24).
I do not understand what use
the larvae make of the lateral chambers. Some in my aquarium, however, only
constructed horizontal tubes, in which
they lived and transformed.
RHYACOPHILIDAE. In this family
the pupa is enclosed in a thin brown
leathery cocoon. I have found two
species, but I am not sure whether
I obtained them in Stony Brook, or in
its smaller tributaries, In one of them
the case is of no regular shape, being
composed of a very few stones, propor-
tionately large.
The other case (fig. 25) is
quite peculiar. It is abundant
in the Bussey Brook, and I
have also found it in Brookline
and Dedham. It is about 9
mm. long, roundish oblong in Kg- 25-
shape, and strongly arched above, and
made of coarse sand or gravel. On
turning it over, one sees a shelf of fine sand, like the thwart of a boat, across
the middle of the case. This dis-
appears during pupation. In Bussey
Brook I found one pupa on May gth,
1891, though most of the cases were
still occupied by the larvae.
HALISIDOTA CARYAE.
BY CAROLINE G. SOULE, BROOKLINE, MASS.
A mat of eggs was found on the
together, about one hundred in number,
under side of a leaf rather high up in
hemispherical, the flat side being on
a thorn-tree, on June 38th, 1891, the leaf. When found they were of a Brookline, Mass.
The eggs were close
leaden color, and soon each showed a




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October 1891 .]
PSYCHE.
red streak, then a black dot near the
centre of the top, the dot being the
head of the larva. On June 29th, they
hatched.
The young' larvae were of a dull white
color, with a black dorsal patch on the 1st segment, and a black dot below this on each side. The other segments had, on each side, two large black dots and a small one set in a triangle, and a smaller dot on the stigmata1 line. Anal shield black. Head became
black. Feet black; props white; anal props dotted with black, very slender. Sparse
black hairs all over the body. The black was very shining.
The larvae fed and rested in a close
crowd.
They were very active, mov-
ing very rapidly.
They ate only the
green pulp of the leaf, and wanted
much water. July 3rd, they spun a
web on the leaf and all settled on it in TOWS.
July 5t11, First moult.
Head very large
and black, conspicuous. Body as before,
except that the sparse hairs were partly white, partly black; and the 2nd and 3rd segments had each two large black warts on each side of the dorsal
line and one on the
stigmata1 line; anal segment had two large black warts instead of being all black. The spiracles were black, and showed clearly. The white color of the body was an opaque, glossy white, like porcelain, and the 2nd and 3rd segments looked very white, having
fewer black marks than the others. The
hairs were, longest near the head, and pro- jected over it.
On July 10th they spun a
web for moulting.
July nth, Second moult. As before, but
larger, and with the hairs longer and denser. The larvae lived now in two crowds,
one on each side of the hickory leaf
which I substituted for the thorn, and
still ate only the pulp.
On July 16
they spun a web on each side of the leaf. July 18, Third moult. Head round,
slightly bilobed at top, shining black.
Body as before except the hairs. ist, 2nd and 3rd segments as before. 4th and loth segments had a longer pencil of black hairs arising from the black wart nearest the dorsal line, on each side, the hairs meeting over the line so as to give the effect of a single pencil. On each side, lower down, was a longer,
single pencil, also black. The other seg- ments had the dorsal double pencil, and all had longer white hairs on the sides, these being longest over the head and anal seg- men t.
The larvae now began to eat through
the fibre of the leaves, and on July
aist, spun a web.
July 23rd, Fourth moult. As before, but
larger. July 28th, spun a web.
July 3oth, Fifth moult. Head, feet,
props and venter black. Body more speckled with black, the ground color being greenish white. Short, thick, white pencils on each side of the dorsal black ones, lay close against these, and formed with them a convex ridge along the dorsum. The lateral hairs were less dense and longer. Two thin long, white pencils on ist, and, nth and 12th segments, the first two pairs extending over the head, the last two over the anal end.
The larvae ate enormously and
moved very fast. When touched vigor-
ously they curled up and rolled off the
leaf, but did not mind being jarred or
moved.
Aug. 5, spun a web.
Aug. 7th, Sixth moult. Length 14 inches, though two or three measured I* inches.
The hairs were denser on the dorsum,
and had a grayer tinge. Otherwise as
before.
Aug. 16. They measured 11 inches




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160 PSYCHE. [October 1891..
in length, and began to spin cocoons.
They spun first a slight net, and cov-
ered it with their long hairs laid on
lengthwise and lying smooth and
flat.
Through this net they pushed
their short hairs at right angles, or
nearly so, with the surface, so that
these hairs stood up as if growing on
the cocoons, and gave them a rough
surface-like that of a head whose hair
has been cut very short, but not shaved. The cocoons varied in length from %
inch to 1-1 inches. They were of a
regular ovoid shape, and of a gray
color from the black and
white hairs of
the larvae. Some were spun on the
side of the tin, some on the cloth over
the top of the tin, and more on the
under side of the leaves, though with
no attempt to draw the leaf over the
cocoon.
The hickory trees were so defoliated
by these larvae this year, that I de-
stroyed all but twenty of my brood, as
soon I was sure what they were. Of
the twenty none died.
Aug. 20.
The pupa cast the larva-
skin.
Pupa. 8 inch long, smooth, stout, larger around the abdomen than around the thorax; with eyes and antennae well marked. Its
color was bright tan. There was no anal hook. A LIST OF SOME OF THE CATALOGUES AND LOCAL LISTS OF NORTH AMERICAN COLEOPTERA.-I (A*-G.) .
BY JOHN HAMILTON AND SAMUEL HENSHAW.
In studying the distribution of certain
of our species of Coleoptera it has been necessary to go over a considerable part of the American literature ; when so do- ing a memorandum of all lists and cata-
logues was made and is now published
as an aid to others engaged in similar
studies.
Some of the lists contain so few
species as at first sight to appear un-
worthy of note, but frequently they
include some of the most interesting and valuable records ; in fact the value of a local catalogue is often to be estimated not so much by the number of species
contained as by the geographical position of the locality itself, and the accuracy of the determinations.
We make
no comments on the cor-
rectness of the identifications' in the
various lists. The student can form his
own estimate of them.
All lists here quoted have been per-
sonally examined unless noted to the
contrary.
Notice of any omission will be very
welcome.
I Anon. List of Coleoptera [of Canada].
n.p., 1867, 12 p.
1131 species are listed.
2 Austin, E. P. Catalogue of the Coleop- tera of Mt. Washington, N. H. (Proc. Bost. soc. nat. hist., 1874, v. 16, p. 265-3'76.) 221 determined and 13 undetermined species are listed; new species are described by Leconte. 3 Austin, E. P. Supplement to the check
list of the Coleoptera of America, north of Mexico.
Boston, 1880, 4 + 67 p.




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