156 DTPTERA OF NORTH AMERICA. [PART IV

ERIOPTERA. 157

whereas

the other veins are yellowish-brown; costa

and

first longitudinal veinsyellowish.

Hah. Washington,

D.

C, and

farther north; notrare.

4.

E. Tespertisia

0. S. % and 9.

—

Ochracea, thorace snperne saturate rufo-fusco; humerissulphureo-flavis; alisimmaculatis; venis pallidis; lialteribusflavis.

Ochraceous, thoraxof a saturate reddisli-brown above; liumeri sulphur yellow; wings immaculate; veins pale; halteres yellow. Long. corp.

0.22—0.25.

Syn. Erioptera vespertina 0. Sackhn, Proc.Ac. Nat. Sc. Phil. 1859,p.226.

Ochraceous, witha slight

brownish

tinge; frontsulphuryellow,

brown

inthemiddle; rostrum yellowish,palpibrownish; antenna)

brownish

;

two

basal joints

somewhat

pale, butinfuscated atthe tip; basis ofthe flagellum likewisepale.

Thorax

reddish-brown

above

; the usual four stripes hardlyinxlicated

by

faint, yellow, dividing lines

; pleurae yellowish, very slightly

hoary

;

humeri

sulphur yellow_; halteres y^ellow; feet slender, brownish-yellow

;

abdomen

brownish-ochraceous;

horny appendages

of the

male

forceps (Tab.

lY,

^fig. 20)

brown

atthe tip.

Wings

with a slight grayishtinge ; veins pale.

Hab. Washington,

D. C.^; Florida;

Wisconsin

(Kennicott)

;

notrare.

5.

E. cliloropliylla

0. S.

%

and 9^.—Pallidaviridis tota.

Altogetherpale green. Long. corp. 0.2

—

^0.25.

Syn. Erioptera chlorophylla O.Sacken,Proc.Ac.Nat.Sc.Phil. 1859,p.226.

Body

^{pale green} ; antennoe, halteres, veins, genitals, etc. like- wise; the eyes alonebeing black.

The

ovipositor of the female

israther long; the

upper

valvesbut little curved (wing, Tab. I, fig. 16).

Hab. Middle

States; notrare.

6.

E. straiuinea,

n. sp.

%

^and 9^.

—

Pallide flavatota.

Altogetherpaleyellow. Long. corp. 0.2

—

^0.23.

The whole

body, including the wing-veins, is uniformly pale yellow_; thelast tarsaljoint slightly infuscated.

For

a long time I took this speciesfor a

mere

variety of

E.

chlorophylla; but the

upper

valvesof its ovipositor are shorter

and much more

arcuated.

158

DIPTERA

OF

NORTH AMERICA. [PAUT

IV, b. Seventhlongitudinalveinstraight,diverging fromthe sixth;

discalcellclosed.

* The fork of the posterior branch of the fourth longi- tudinal vein consists of two gently arcuated branches: subgenus

Acyphona

(comparep.152).

'V.

E. TCnusta

^{0. S. % and 9-}

—

Alis flavescentibus, fasciisduabus fuscis; femora anteapicemanuulofusco.

Wings

yellowish,with two brown bands; femora beforetheapex with a brownband. Long. corp. 0.23.

—

0.25.

Syn. Erioptera venusia 0. Sacken,Proc. Ac. Nat. Sc. Phil. 1859,p.227.

Body brown

; antennoe palerontheirbasal half; thorax reddish above, with a faintindication of a double stripe in the middle

;

genitals reddish-yellow; haltcres

and

feet pale

yellow

; femora with a

brown band

before the tip; on the front femora there is

an

indication ofa

second band

aboutthe middle;

wings

(Tab. I, fig. 17) pale yellowish, with

two brown bands;

thefirst begins at the origin of the prtefurca,is broadestin the middle,

and

reaches theposterior

margin

so as to include the tipof the seventh longi- tudinal vein; the other

band

lies almost entirely

beyond

the central cross-vein; it runs through

from

the anterior tothe pos- terior

margin

; itis almostof equal breadth; itincludesa pale spot at each

end

; in

some

specimens, the spot at the anterior

margin

isconnected with the jellov^r of the apicalportionof the

wing

^; in this case a

brown

spot atthetipofthefirst longitudinal veinisisolated

from

the

band

; the cross-vein, closing the discal cell, is clouded; thetip of the anterior

branch

of the secondvein and thetips ofboth branchesofthe fork

which

includes the third posteriorcell,

and

the subcostal cross-vein are likewise clouded.

Hab. Middle

States;

common

(I

have

seen specimens

from

New York,

Virginia, Georgia, Illinois, Connecticut, etc.).

8.

E. armillaris,

^{n. sp.}

%

^and 9-

—

^-AHs flavescentibus, fascia mediaangustaetnebulis parvis invenaruminitioetapicesitis,fuscis

;

femorapallida, fusco-annulata,vel fusca, pallido-annulata.

Wings yellowish,with a narrow brown band in the middle, and small brownish cloudsattheoriginsandatthetipsoftheveins;femora^pale, withbrown bandsorbrownwithpalebands. Long.corp. 0.23

—

^0.25.

Body brown;

antennae paler

on

theirbasalhalf; thoraxreddish above, with afaint indication of a double stripein the middle

;

EEIOPTERA. 159 genitals reddish-yellow; halteres yellow; feet pale yellow; the

femora

of

some

specimens are pale yellow, with a

brown band

before the tip; in other specimens they are

dark

brown, with a pale

band

;

wings

yellowish; a

narrow brown band

runs along the central cross-veins,

and

generally does not

go beyond

the great cross-vein; sometimes, however, it is connected with a cloudatthe

end

of the anal cell; small

brown

clouds at the tip ofallthe veins (exceptthethird),

on

the subcostal

and

the discal cross-veins, at the origin of the prsefurca,

and

the inner

end

of the third posterior cell; the middle portion of the fifth longi- tudinalvein infuscated

and

surrounded

by

a

more

orless

extended

cloud,

which sometimes expands

so as to coalescewiththe spots at the origin of the prjefurca

and

atthe tip of the seventh vein,

and

formsa

band

not unlike the inner

band

of

E.

venusta.

Hah. Trenton

Falls,

N. Y.

;

Washington,

D.

C,

etc.

This species is in all respects similar to

E.

venusta, only the

brown

pictureofthe

wings

is lessextended. If

we

imagine

some

of the spots

more

expanded,

two

bands,perfectly similarin shape tothose of

E.

venusta will be formed. Still, although I

have

seen

numerous

specimensof

E.

venusta, Ifound itspicture rather constant,

and

I have not observed

any

specimens with

brown

femora, asthey occur in

E.

armillaris.

The

following species

—

E. graphica — shows

also the

most

striking analogyto

E.

armil- laris in the distribution of the spots

on

the

wings

; only the

body

as wellas the

wings

is a

shade

darker brown. If

E. graphica

did notexist,I

would

feel lesshesitation

about

uniting E. armil- laris

and

venusta; but

E. graphica

is,toallappearances,nothing but a dark colored

E.

armillaris,

and anybody

w^ouldhesitate to consider

graphica and

venusta as the

same

species. I invitethe attention of collectors to these three species.

9.

E. grapliica

0. S. % and 9^.

—

^Fusca,alis fuscescentibus, fascia medi§, angustS,etnebulisplurimisfuscis; inmargineautico majoribus,

;n posticoparvis; femorafusca,annulo ante apicempallido.

Brown, wings brownish, with a narrow brown band in the middle, and numerous brown clouds; larger ones along the anterior,smaller ones alongthe posteriormargin. Long.corp. 0.25

—

^0.27.

Syn. Eriopteragraphica 0. Sacken,Proc.Ac. Nat. Sc. Phila. 1859, p. 227.

Body

brownish; antennse paler at the basis;thorax yellowish-

gray

above, with afaint

brown

stripe,divided in

two by

a longi-