Article beginning on page 353.
Psyche 5:353-354, 1888.

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June iSgo.] P,5'2Tflli?. 353
considerably thicker. The markings
of the body have materially changed.
The prothoracic shield, in the two
last stages split in two longitudinally, is now also split tranversely, so that it is represented by four transversely narrow
piliferous warts. On each succeeding
segment there is a transverse dorsal
broad black-brown band, which en-
closes a yellowish white narrow stripe,
which in the middle and at each end
enlarges into a round spot; there are
ten such curious whitish stripes on a
blackish ground, which only extend
part way down the sides of the body
toward the spiracles. The piliferous
warts are not so pronounced as in the
preceding stages, while the body and
hairs are of a pale chestnut hue.
S-fage VI and last.-Length
23-24 mm. (Evidently underfed, Mr.
Edwards's specimens measuring 52
mm.). In the final stage the head
is pale chestnut, with no black por-
tion. The top of the body is now
black, and each segment except
the first behind the head bears two
transverse white stripes, one in front
and the other behind a transverse
chestnut-red band, enclosing the pilifer- ous warts, which are much more promi-
nent than in the 5th stage. Of the two
yellowish white transverse stripes, the
one on the front of the segment is divided into a central dot with a separate slash on each side ; the hinder band consists
of three portions, a central dot, from
which a stripe passes each bide, and in- stead of ending in a dot, makes a loop
or hook. Our drawings made by Mr.
Bridgham agree well with Mr. Ed-
wards's description.
It thus appears that the markings
of the two last stages of this larva are very different from those of any genus
whose larval history is known to us ;
Mr. Edwards has pointed out its rela-
tions to the larva of Arachnis and
Ecpantheria, with which we are not
familiar.
TWO SPECIES OF AESCHNA.
BY HERMANN AUGUST HAGEN, CAMBRIDGE, MASS. I. AESCHNA SITCHENSIS.
Aeschna sitchensis Hagen, Syn.
Neur. N. A. I 19, I.
Blackish-brown, spotted with blue ;
head yellow in front, anteriorly with a
narrow transverse black line ; superiorly a large black spot in the shape of a T,
nearly or entirely connected each side
with a black band before the eyes, form- ing two yellow spots surrounded with
black on the superior part of the front ; rhinarium and border of the labrurn
black ; eyes largely connected ; occiput yellow, hind border elevated, black on
each side ; thorax fuscous, dorsum with
two median elongated points ; sides




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334 fi 1 CHA. [June 1890.
darker with two inaculose narrow, very
angular stripes, whitish blue ; abdomen
long, slender, equal, very much arcua-
fed behind the inflated base in both
sexes ; brown spotted with blue ; seg-
ments 3-10 with two large, apical blue
spots, 3-7 wit11 two basal blue spots ;
second segment with two blue lines
on each side ; appendages ( 8 ) black,
moderate, a little incurved, folia-
ceous, the ba~e narrow, finely denticu-
lated on the inner margin ; carinated
within, before the apex the carina is in- flated and finely spinulose ; the rounded apex has a very short, acute, incurved
spine ; inferior appendage one-half short- er, elongately triangular, obtuse ; ap-
pendages ( 9 ) foliaceous, broad (only
the basal part is known). Genital parts
in the second segment ( 8) similar to
those of A. septentrionalis, but the
outer spine of the anterior piece is long- er than the hamulus, slender, the tip
sharp and curved downwards ; hamuli
foliaceous, flat, cut straight on the tip ; feet brown, black beneath; wings hyaline, costa yellow ; pterostigma elongated,
fuscous ; membranule brackish gray ; the s ubnodal sector sometimes not bifurca-
ted ; 15- I 8 antecubitals, 8-1 I postcubi- tals. Length 55-58 mm. ; alar expanse
78-83 mm. ; pterostigma 4 mm.
HAB. Sitka, Alaska ; Saskatchewan,
Brit. Amer.
I have seen three males and two
females. In my Synopsis an imperfect
female was described ; this species is
very similar to A. septentrio~zaZis but
differs in the genital parts of the male, the longer connections of the eyes, the
color of the front, and the slender abdo- men. Aeschna minor Rambur. quoted
in the Synopsis, p. 20, as very similar, belongs to A. jazata Say.
11, AESCHNA SEPTENTRIOXALIS.
Aeschna se/ten/rionaZz's Burm.
Handb., 1839, v. 2, 839, 1 I .-Hagen
Syn. Neur. N. A., I 20, 2.
Blackish-brown, spotted with blue ;
head yellow in front ; anteriorly a nar- row transverse line, superiorly a large
spot in the shape of a T ; the rhinarium and margin of the labrum black ; eyes
shortly connected ; occiput large, yel-
lowish, the hind border elevated, black
on each side ; thorax fuscous, dorsum
with two median elongated points ; sides darker with two narrow, maculose and
angulated stripes, whitish-yellow ; feet black, above rufous ; abdomen long,
stoutish, narrowed behind the in-
flated base ( 8 ), black, spotted with
blue; last segment blue, with a broad
black median band, scarcely reaching
the tip ; an elevated basal tooth above
( 8) ; appendages brownish black, inod-
erate, a little incurved. foliaceous, the base narrow, a basal obtuse tubercle be- neath ; carinated inwardly, apex obtuse
inflated in front ; inferior appendage one half shorter, elongately triangular, ob- tuse ; genital parts in the second segment ( (t, ) with the anterior piece elevated ; strongly depressed in the middle, with
a conical, straight, stout spine, as long as the hamulus on each side ; hamuli fol- iaceous, cut obliquely on the tip with the outer angle rounded, the interior part is bent up suddenly, large, triangularly
shaped on the b'ise ; penis with a hook on



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the antepenultimate segment ; appen-
dages (9) short (3 mm.) foliaceous,
broad, obtuse, wings hyaline, costa yel- low ; pterostigma elongated, fuscous ;
me~nbran~de blackish gray ;the subnodal
sector sometimes not bifurcated ; 13- 16 and I 8 antecubitals ; 10-1 3 postcubitals ; 4-5 areoles beneath the pterostigma.
Length 51-60 mm. ; alar expanse 74-86
mm. ; ptei-ostigma 4 mm.
HAL Labrador ; Fort Resolution
and Saskatchewan, Brit. Amer. ; one
$ White Mountains, N. H.
This species is very much like A.
bo~ealis from Europe ; I am not able
to separate the males, except that the T spot on the front has a larger and more
rounded head in A. se$tentrionaZis;
the appendages of the female are more
widely separated at the base, less broad and somewhat incurved in the European
species. I consider the two species as
local varieties, but owing to the obvious difference in the appendages of the fe-
males it seems more prudent to keep
them separate for the present. I have
compared 15 specimens of A. septen-
tyionalis and g specimens of A. boreaZis from Lapland, Sweden, Silesia and
Switzerland. Both are arctic species.
Many years ago I saw a specimen from
the Wilui River, Siberia, but this speci- men is not at hand and as at that time
I believed A. sitchensis to be the same
species I am unable now to say if the
Siberian specimen belongs to A. boyea-
Us.
DESCRIPTIONS OF SOME NEW NORTH AMERICAN
DOLICHOPODIDAE.
b
BY WILLIAM M. WHEELER, MILWAUKEE, WIS.
(Continued from 9.343.)
GYMNOPTERNUS POENITENS, n. sp. $
Length 2.75 mm. ; length of wing 2.75 mm. Dark metallic green. Face moderately
broad, covered with hoary dust. Antennae black throughout, third joint large and of the usual shape, somewhat pointed and
covered with conspicuous whitish pubes-
cence; pubescence of the arista, which is inserted in the middle of the dorsal con- tour of the third joint, appressed and
perceptible only with di-fficulty. Front rather dull metallic green; cilia of the in- ferior orbit white. Thoracic dorsum shin- ing blackish green, posteriorly with a bril- liant golden reflection, apparently without any traces of dust. Scutellum blackish
green with a golden reflection, bearing a few black hairs besides the usual setae. Pleurae anteriorly metallic greenish black, posteriorly black, overlaid with hoary dust. The yellow tegulae have black cilia. Abdo- men blackish green, lacking the golden
reflection of the thorax and scutellum;
venter black, dusted with white; hypo-




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