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Psyche 6:321-322, 1891.

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September 1892.1 PSYCHE.
NOTES ON SOME MYRMECOPHILOUS COLEOPTERA. BY HENRY FREDERICK WICKHAM, IOWA CITY, IOWA. In a recent paper published in the
Proceedings of the Entomological so-
ciety of Washington (vol. I, 1890, pp.
237-247;) Mr. E. A. Schwarz has
listed all the North American beetles
that are known to be myi-mecopl~ilous
and has added notes on some that he
considers doubtfully such. Two arti-
cles by Dr. Hamilton in the Canndian
entomologist (vols. 20 and 21) and one
by Prof. J. B. Smith in the American
naturalist (August, 1886) also treat of
these insects ; to them I wish to add the following data which seem to be new.
I am greatly indebted to Dr. Horn for
determinations of many species and for
suggestions regarding the new Hetae-
rius herein described; and to Prof. C.
V. Riley for the names of the ants,
specimens of which he had compared
with those in the national collection. I have placed in that collection specimens of all the ants noted, the beetles being in my own unless otherwise stated.
Pfomaphagus @a'o occurs at Iowa
City during April, deep in the galleries of a large black ant. This species is
not on any of the previous lists.
FustQer fuchsii has long been
known as a myrmecophile but hitherto
the host has not been recorded ; I took
it at Williams, Arizona, in the nests of a variety of Cremastogaster lineolata.
All of our best coleopterists to whom
I have sent examples of the Arizona
same as the types from Tennessee.
Ctenistes julvereus was listed by
Mr. Schwarz on the authority of Dr.
Leconte. By the capture of several
specimens at Tucson, Ariz., I am able
to verify the Doctor's observation and
to record the hitherto unknown host as
Formica schau fussi.
Lomechusa cava. This species is
mentioned to call attention to the wide
distribution of the genus ; specimens
differing little from cava except in size have been taken by me, with ants, in
the Cascade Mts. of Washington and
in the Rockies of Colorado ; the species is also found in the Mississippi Valley
and thence east to the Atlantic.
Gyrophaena sp. A number of
specimens of this species-a true myr-
mecophile-were taken at Canon City,
Colorado, in the nests of Solenojsis
debilis which they resemble so closely
in color and size as to render detection somewhat difficult when the colony is
disturbed and the ants in motion ; the
ants show no hostility towards it. From
Prof. Riley I learn that this is the same species recorded by Mr. Schwarz (lot*
cit. p. 224) as Myrmecochara? n. sp.,,
collected by Morrison at Lake Tahoe.
Philonthus micro$JzthaZmus occurred
at Iowa City in the nest of Aphaeno-
gaster fulva, probably however merely
as an accidental visitor; in the same
nest I took a species of Scopaeus nut
species unite in declaring it to be the
yet determined.




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PSYCHE.
[September 1892.
LimuZodes paradoxus is found here
with the same ant as the preceding spe-
cies though Mr. Schwarz takes it with
Lasius aphidicola. I once took a
specimen at Walnut, Ariz., with an-
other ant and it will probably be found
to infest the nests of several species.
TricJzopteryx @aile/ofi$eda. A
specimen doubtfully referred to this
species occurred with ants (Tapinoma)
at Caiion City, Colo. This is con-
trary to the usual habit in this genus
and is probably accidental.
A species of Hetaerius taken by me
in Wyoming proves to be new, and as
it is very distinct and the species of the genus are few, I describe it below to
preserve the record :
Hetaerius Aornii n. sp. Form robust,
broadly sub-oval, color rufo-castaneous ; sur- face shining sparsely covered with yellow scale-like hairs, longer on the sides and near base of the pronotum. Head with rather
large tolerably dense punctures, front con- cave. Thorax broader than long, wider at base than at apex ; divided on each side by a deep groove which is double at the base, into lateral and discal portions : discal portion shining, with a few punctures and clothed with yellow recumbent hairs, sparse at the middle but more numerous on the sides and especially at base where they are also much longer; lateral portion divided again by a deep groove about 1-3 from base of thorax into anterior and posterior divisions, the latter being sub- quadrate, convex, somewhat shining, finely punctured and covered with long yellow hair ; .the anterior division is irregularly oblong, wider in front, flattened, and, where the ab- sence of hairs permits the surface to be seen, somewhat scabrous; it is clothed with yellow hairs which become longer behind. Elytra with the striae deep at base, each having the outer margin raised, subhumeral stria reach- ingabout two-thirds to tip, first and third dorsals entire, the tips converging, second a little shorter. The raised edge of each stria bears yellow recumbent hairs, longer on the first and third dorsals; between the inner dorsal and
the suture are two rows of hairs
following the course of lines of indistinct punctures. Propygidium with but few punc- tures visible under low power, but with
higher power it is seen to be densely and finely rugose; pygidium much the same but with still finer punctures, mostly towards the sides ; margins of propygidiurn and pygidium dark. Prosternum punctured, margined at
sides, truncate at base, lobe with a moderate constriction anteriorly, extremity somewhat rounded ; prosternal ridges extending two thirds towards apex, nearly parallel. merely slightly sinuate opposite the coxae. Meso- sternum punctured, with distinct marginal line. Metasternum and abdomen smooth,
shining. Length 2.5 mm.
Differs from H. t~istriatus, to which
it is nearest allied, in the sculpture of the thorax and in vestiture ; the form of the lobe at the posterior angles of the
thorax is globular in that species.
Taken by 111k at Cheyenne, Wyoming
in the nests of Formica schcitifussi
Mayr, in May 1889. Type in cabinet
of Dr. Horn to whom it gives me
pleasure to dedicate it in recognition of many favors rendered.
Rhyssemus sonatas occurred with
Solenopsis debilis at Caiion City, Colo., but this may be merely accidental as is
often the case with Aphodiusgraza/~ius
which I find in the ant's nest here.
When the habits of our western spe-
cies of Tenebrionidae are better known,
I think it will be found that they fur-




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September 1892. ]
PSYCHE.
nish their full quota of n~yrmecopl~iles. The capture of n~~mbers of Araeoschi-
zns armatz~s in an anthill at Green
River. Wyo. has already been recorded
by me (Ent. amer., v. 6, p. 84) and
quoted by Mr. Schwarz in his paper
cited. Though Dr. Horn holds that
Araeoschizus is neither parasitic nor
iniq~iiline, the fact remains that they
are much more abundant in and around
mint's nests. I noticed this especially at Tuscon in the case of three species (A.
regularis, fnzbriafm and sim$lex)
which I found there in considerable
numbers.
Notibizts puberulus is often found in
ant's nests or in the immediate vicinity. At Fort Yuma I have noticed them
running across ant hills or around the
entrances to the underground galleries
without the interference of the ants ;
near Los Angeles while at work with
Mr. Coquillet we dug up a large nest
and found in it, besides some specimens
of Notibius functicollis, a number of
Codus elozgatus and Ezwynzeto-
$on convexicolle. I think it quite
possible, considering that nothing is
known of the early stages of these ,
beetles, that they may breed in the
nests, though it is also likely that they may use them simply for shelter just as
Eleodes disfersa uses the holes of
prairie dogs.
ADDITIONAL NOTES ON BOMBYCID LARVAE.
BY HARRISON 6. DYAR, BOSTON, MASS.
HALSJDOTA ALNI Hy. Edw.
1876- Hy. Edw., Proc. Cal. acad. sci., vii, 129 (as a variety of H. agassizii).
1882-Grote, New check list, p. 16.
1891-Smith, List. lep., no. 1129 a,
Mature larva. -Head rounded, smooth,
black and very shiny; bases of antennae, labium and a line below clypeus yellow;
width 3.5 inm. Body black, mottled with
yellowish, which predominates ventrally; abdominal feet dull yellow, the claspers brownish ; thoracic feet black ; spiracles white. The warts are arranged as in H.
maciilata* and bear dense, spreading tufts of feathery hairs of even length. but slightly longer dorsally on joints 5 and 12, and
keeled along dorsal line. On joints 2-6 and 10-13 the hair is deep black, on joints 7-9 orange ochraceousf. In the black parts at * See Psyche, vol. 6, p. 165.
+ Ridgway's Nomenclature of colors, pi. v, fig. 3. both ends are several long, thin, white pen- cils, consisting of from one to several hairs and arranged as follows :-on joints 3 and 4 from warts 2-5 ; on joint j from warts 1-5 ; on joint 6, a single hair from warts 3 and 4; on joint 10 a single hair from warts 2-4; on joint 11 from warts 2, 3, and 5; on joint 12 from warts I and 2 and on joint 13 from the large wart and the lateral one.
Food $lanis.-Willow (Salix) and alder
(Ainus).
Habitat. -The Sierra Nevada range of
California and probably further north.
Mr.
Edwards's example came from Shasta Co.,
mine from Mariposa Co.
HALISIDOTA AGASSIZII Pack.
1864-Packard, Proc. ent. soc. Phil., v. 3, 128.
1873-Stretch, Zyg Bomb. N. A. v. I, 103
1889.-Hy. Edw., Bull. no. 35, U. S. nat. mus., 62. fi. var of nzacdata.
1891-Smith, New list, p. 27. macztlata.




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