Article beginning on page 272.
Psyche 7:272, 1894.

Full text (searchable PDF)
Durable link: http://psyche.entclub.org/7/7-272.html

The following unprocessed text is extracted from the PDF file, and is likely to be both incomplete and full of errors. Please consult the PDF file for the complete article.

272 PSYCHE. [Augirat 1895.
joint, knees of middle and of hind legs and ished, except segments 6, 7 and g which are the tips of their tibiae, lioney yellow. Wings finely shagreened from some microscopic
hyaline, the veins brown, the marginal vein punctures and bearded with white hairs.
linear but rather slout, twice as long as the stigmal, the post-miirginal slender, a little longer than the stigmal. The flagellum is about three and a half times as long a6 the scape; thc funicle j-jointed, the first joint the longest, not quite twice as long ils thick, tlie following joints imperceptibly shortening, submonilifonn ; club 3-jointed, a little longer than the first two funicular joints united, llie joints closely conjoined. Thorax as in K. diasfro'fiJii. Abdomen conically pointed, 3. Length 2.5 mm. Agrees with the $!
in color, but the funicular joints are incised and pedicellate at tips, the thickcncd portion being furnished with two whorls of long
white hairs, some of which are as long as the joints, the latter very gradually decreasing in length; the club is as long as the first iun- icular joint, but slenderer; while the body of the abdomen is small, compressed and as
viewed from the side triangular in outline attached to the metntliorax by a long petiole subcnmpressed, nearly one-half longer than which is finely sculptured or shagreened and the head nnd thorax united, smooth and pol- nearly as long as the body of the abdomen. PRICKLY LEAF-GALL OF RHQDITES TUMIDUS ON ROSA FENDLERI.
BY C. H. TYLER TOWNSEND, BROWXSVILLE, TEXAS. A few miles to the north of Ojo
Calicnio, on the Hot Springs reserva-
tion, in Socorro County, New Mexico,
some spherical prickly galls were
found in bunches nn the leaves of it
wild rose, June 18, 1892. They were
the size of very large peas, reddish and greenish, and covered with prickles
One of these galls that w:is opericd
Dec. 13, 1892, contained a whitish live
hysnenopterous pupil, which Wiis soine-
what active. This \\as the pupa of the
gall-maker, Rhoditrs tmnidus Bass.
Descriftion of gall,-Dianieler 3 to g mm. Usual size, 6 to 8 mm. Globular, or sub- globular, covered with prickles on upper half, prickles mostly directed upward especially the more superior ones which are from I to mm. long, those on sides much shorter.
Color brick-reddish nbove, and pea-green below, indicating the surface that 1x1s been cxposed to the sun and that which has been sheltered therefrom. Growing in bunches, from 2 to 10 in a bunch, rarely singly.
Borne always on upper surface of leaf, soine- times three on the same very small leaf
which is thus almost obliterated, eornetitnes borne on petiole of leaf, often double. Gall co~liiiiii~iga single large perfectly round cav- ity, lined wit.h a very thin greenish lining, w;ills I+å mm. thick in gall of 8 inn). extern:il diameter, leaving cavity about 58 ram. in diameter. Walls porous, ininutely cellular, a cross section appearing finely reticulate under lens, the lining of cavity sharing this appear- ance. The walls average I nini. in thickness. Each gall contains but a single occupant. The double ones never communicate inside. The gall-fly emerges by a circular hole
gniiwcd in one side of the gall about 14 inin. in diameter.
Described from 38 galls, ' From two
of these galls, two gall-flies had




================================================================================

Augral 1895.1 PSYCHE. 273
emerged and died, being discovered
April 2, 1893. On April 3, 1893, till
of the remaining' 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)
:I small shrivelled larva. The occu-
pants were as follows : Dead adults
(inchidingthe 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 @fly is 4 to 4& mm. long.
The whole insect is black, except
the abdomen am1 legs wliich ale
orange-led. Wings subhpline, shaded
with fuscous. It is a notable fact that
no hign of a parasite was discovered in
all of these galls.
I am indebted to Mr. Win. H. Ash-
mead foi identifying the Rhodites. It
is a very pretty species. The abdomen
changes to a dark but very highly
polished brown in dried specimens.
THE KOMRYLID GENUS ACREOTRLCHHS IN AMERICA. For several years past the writer liittei- ;is broad as long, both densely long has enjoyed the privilege examining
black pilose; third joint slightly over twice i,,teresti,lg foTmsof D~~
talxen
as lol~g as the first, at its base nwomr tlian the second joint, continuing slender by Prof. 0. 13. Jolllison in variom p.l~.ts ,,early dm tl,ell ^^, of the state of Washington, and several
exDa,ldi,,n- to twice its former width,
"
of these have been made known from
the grentest expansion being on its upper tilme to tirne in oLlr va,-ioils cntolllo- side, tlien tapering quite suddenly to the logical journals. Among a recent
sending is a single specimen belonging
to the Homl~~lid genus Acrcotrich~~s
of Mticquart, heretofore known only
from At~strali;~. It is closely related
to the genus Plithiria, differing in the structure of the antennae and in the
densely hairy face. The species is as
follows :
Ac.reotrichus ame~icanus n. sp. 3. Black, including tlie piilpi and knob of li:iltci"s, only the stem oå tin; loiter is yellow. E~es contiguous, frontal triangle and face gray pollinose, face find 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 tip which is blunt; a short, blunt-pointed style on the upper sick of this joint a short distance before the apex; on the upper edxe ofthe expanded portion of this joint ale five bliick bristly hairs, each'neai-ly half as long' -cis the joint itself. Proboscis as Ions as the hen-d and thorax taken together, the lsbella very narrow; palpi filiform, two- fifths as long as the proboscis. Thorax
velvcty, the front corners, sides and pleura gray pollinose, its pile black; scutell~~n~ velvety, densely black pilose. Abdomen
velvety, its pile lig'ht yellowish. Wings hyaline, stigma- yellow, second submargi~:il e l not appendiculate, small crossvein
scarcely beyond the middle of the discal cell. Length 7 mm. Washington. A single
specimen captured April 4, 1894 (0. B.
Johnson).




================================================================================