A new pelecinus-like genus and species of Platygasteridae

124

PROCEEDINGS ENTOMOLOGICAL

SOCIETY

A NEW PELECINUS-LIKE GENUS AND SPECIES OF PLATY- GASTERID^E.

PLATE VIII.

BY

J. C.

CRAWFORD

ANDJ. C. BRADLEY.

DOLICHOTRYPES,

^new genus.

Antennae inserted just above

mouth

_parts, ten-segmented, with an _apparent ring-joint; the scape long; the funicle three-segmented, the ^firstsegment ^being longest and the last shortest; theclub four-segmented; ^{lateral ocelli} nearer to the

compound

eyes than to the front _ocellus; parapsidal furrows complete or obsoleteanteriorl)'; scutellumbifoveolate at base, produced^at apex ^{into a}short, blunt _spine; metapleurae with ^a long ^slenderspine on each side,

more

or less obscured

by

^the

vestiture; wings veinless; hind wings ^{contracted at base;}

middleand_posteriortrochanterselongate, theirfemora_spindle- shaped, the ^tibias strongly pedunculate;

abdomen

_broadly ses- sile, that of the female with five segments, margined ^{at the}

sides, the last threebeinggreatlyelongateand flattened, seven times as long ^as the first

two

_together, the entire

abdomen

eighttimes as long ^as the thorax;

abdomen

of the male short, acute, five-segmented, the ^first segment ^as long ^as the rest taken _together.

Type, the following

new

_species.

This genus belongs ^tothe Platygasterinse, and in Dr. Ash- mead's table to the genera ^{of that} subfamilyⁱⁿ the Journal ^of the

New York

Entomological Society, ^vol. xi, p. 96, the female will run to the second alternate of category ⁶ but dif- fers at once from Polymecus ^{Foerster as} there defined by ^the

factthat the club of the antennae _possesses but four segments and that the lateral ocelli are nearer to the

compound

eyes than to the frontocellus.

The

males of Dolichotrypes run in the key^to Sactogastcr ^Foerster.

The

_genusisevidently closely related to Polvmccns, ^ofwhich species are

known

with a foursegmented ^{antennal club.} Poly- mccns compressiventris ^is the _species which approaches Doli- chotrvpes most _closely.

The

males of Polyinccns ^{differ in} having ^a six-segmented antennal^club,the first segment^{of the} funicle short, the second segmentelongate and twisted. Both sexes differin the proportions ^of the abdominal segments.

Dolichotrypeshopkinsi,

new

_species.

Black, except base^ofscape and legs including coxa?, arebrownish yellow andthe restof the antennae are dark brown. Mostly smooth andhighly polished.

Female Head _finely reticulate; scape long and^slender;thorax and abdomen smooth and _polished; apex^of median segment^{and base of}

PROC. ENT.SOOW*SHINGTON VOLUMEXIII,PLATEVII

DOLICHOTRYPES HOPKINSI,

NEW

SPECIES.