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Show 1877.] MR. F. S M I T H O N N E W SPECIES O F I C H N E U M O N S . 411 consequently been formed for the reception of each. Perissocerus plumicornis is remarkable in having its antennae plumose more than half their length. The genus is undoubtedly closely allied to Xylo-nomus; but its extraordinary antennae, elbowed at the joint where the pubescence terminates, appear sufficiently to warrant its generic separation. Dolichomitus longicauda is allied to the genera Ephialtes and Rhyssa ; but its falcate and compressed abdomen removes it from the former genus, and the incised and tuberculate segments sufficiently distinguish it from the latter. The new species of Bracon is remarkable in having an ovipositor over nine times the length of its body, being the most remarkable instance known of the elongation of that instrument. The new species of Metopius is the only one known to m e from China, or indeed from that part of the world, including India and the islands adjacent. METOPIUS SINENSIS. (Plate XLIV. fig. 4.) Black, strongly punctured, with the apical margins of the first, third, and fourth segments yellow. Head-the front yellow as high as the insertion of the antennae; a narrow yellow line runs up a little way close to the eyes, and an angular shape is produced between the antennse ; a large ovate black macula in the middle of the front; the flagellum of the antennae fulvous beneath. Thorax- above the puncturing is strong and confluent; the scutellum quadrate, and produced over the postscutellum and base of the metathorax ; the lateral margins sharply elevated, and produced posteriorly into stout compressed teeth ; the wings slightly fulvo-hyaline, the nervures rufo-fuscous, the stigma pale ferruginous; the tibiae, tarsi, and posterior trochanters more or less obscurely ferruginous; the anterior femora ferruginous in front; the posterior femora incrassate. Abdomen with confluent punctures, the second and base of the third rugose ; the yellow fascia on the basal segment subinterrupted; that on the third broader, and deeply emarginate in the middle ; on the fourth segment the baud is very broad, and occupies more than half the segment; the fifth and sixth segments have a purple tint. The male differs in being rather smaller, and in being more variegated with yellow; the face is entirely yellow, as well as the scape and the antennae in front; on the sides of the thorax are two longitudinal and one vertical yellow stripe ; the anterior and intermediate legs are yellow, the femora of the former being more or less black behind ; the femora of the latter are black in the middle, and the posterior pair yellow at their base and apex; the tips of the spines on the scutellum are also yellow. Hab. Shanghai. Collected by Mr. R. Fortune. Genus DOLICHOMITUS, Smith. Antennse setaceous; the scape truncate laterally; the flagellum multiarticulate, the joints gradually decreasing in length from the basal one; the head transverse. The anterior wings with an elon- |