OF WASHINGTON.

OF WASHINGTON. 501

His

descriptions of the

new _genus and

the

new

_species are

ap pended.

Apocephalus, Coquillett, nov. gen.

Near

_Phora, but the female furnished withahornyovipositoraboutas long^{asthelastthree}abdominal segments taken together. Frontal setae reclimate, two_pairsof vertical andorbital bristles, a pair of postvertical andocellar bristles,thelattersituatedlowerthan thelowestocellus, also a pairofbristlesabove the base of the antennae; ^thirdjoint of antennae oval, the aristarather robust,pubescent; thorax in profile stronglycon vex; ^{tibiaedestitute}oflong^bristles

on

theouter_side; second heavy^vein of the wingsforked,fourslender veins ofwhichthe firsttwo and last one are arcuate,thethirdgentlycurved_S-shaped.

Male unknown.

_Type,the following species^:

Apocephaluspergandei, Coquillett, ^n. sp.

Head

_{black,opaque, gray} pruinose, the

mouth

_parts andantennae, ex cept thearista,yellow^; thorax yellow, the

mesonotum

_{polished; a pair}of short acrostichal _bristles, a larger dorso-central _pair, two _large and a median small _pair of supra-alar ^bristles,one humeral and two _posthu- meralbristles, also two on the pteropleura; scutellum yellow, bearing four _bristles, middle of

metanotum brown

;

abdomen

_{yellow,opaque,}a pair ofspotsonthe second segment and sometimes on^thetwo _following, alteral vittaand the last

segment

black;

abdomen

bare exceptalong^the sideswhereeachsegmentexcept the^firstbearsafewblackbristles; ovi positorblack, polished,flattened, lobed near the base

where

^{it is}_slightly widerthan thelastabdominal segment, ^theremainder_{of nearly}an_equal width, theapex^truncated; arounded

median

carinaand_{a pair}ofoblong cavities near the base; legs yellowish white, the

tarsi brownish _yellow, middle tibiae each bearing a strong spur ^at apex of the inner side; wings hyaline, veinsbrown, ^costalfringe scarcelylonger than thediameterof the costalvein; halteres yel low, apices of the knobs blackish_; length, ^in- eluding theovipositor, 1.5

mm.

Five female_speci- mens, one of

them

bredfroma headof

Campono-

tusPennsylvania**, by Mr. Th. Pergande,^to

whom

FIG.21. Apocephalus per- I take pleasure ⁱⁿ dedicating ^this interesting ^gandei. Headfrom species.

Type

^No.52OI,U. S. National

Museum.

^front

-

_greatly en

larged^.

No

_{species of}

Phora known

to

me

possesses the three

charac

ters of reclimate frontal bristles, a

branched second heavy

^vein

and

bristleless tibise; this _fact,

and

the possession of a long,

horny

ovipositor,

added

to the

unique

habits,

would _appear

to

warrant

the erection of a separate

genus

^forthe reception of the present species.

D. W.

Coquillett.