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Show 1877.] MR. A. H. G A R R O D O N T H I N O C O R U S A N D ATTAGIS. 413 and tarsi yellow. Abdomen ferruginous and shining; the ovipositor obscurely ferruginous, with the sheaths black and pubescent. Hab. Amazon valley. Collected by Mr. Henry Walter Bates. BRACON PENETRATOR. (Plate XLIV. fig. 1.) Rufous, with the antennae, three basal segments of the abdomen above, the posterior legs, and the sheaths of the ovipositor black; wings flavo-hyaline, each having four black spots ; the head, thorax, legs, and the apex of the abdomen pubescent. The head smooth and shining ; the face with long thin fulvous pubescence ; the anterior margin of the clypeus narrowly, and the tips of the mandibles, black; a small circular cavity on the vertex between the eyes, in which the ocelli are placed, black. Thorax smooth, shining, and impunctate; the wings have a pale fuscous band on their apical margins ; two blackish-brown spots at the anterior margin of the fore wings, the first somewhat oblong-quadrate, covering the apex of the externo-median and the base of the second discoidal cell; the second spot is quadrate and occupies the base of the marginal cell and the apex of the stigma; a third spot, irregular in shape, is placed in the first discoidal cell; a fourth, larger, ovate spot is situated in the middle of the posterior wings; the anterior wings have also three minute paler spots, one in the second discoidal cell, a second beneath the second submarginal, and a third in the second submarginal cell; the articulations of the joints of the posterior legs are more or less rufo-piceous. Abdomen-the lateral margins of the basal segment are deeply longitudinally sulcate; the middle of the segment rufo-piceous ; the lateral raised margins of the two basal segments are reddish-yellow ; the basal margin of the fourth segment narrowly black ; the apical margins of the third and fourth segments and the' fifth aud following segments rufous. Length of the body 9 lines, of the ovipositor 7 inches. (The figure is slightly enlarged.) Hab. Yokohama (Japan). Collected by Mr. Jonas. EXPLANATION OF PLATE XLIV. Fig.l. Bracon penetrator 5, p. 413. Fig. 3. Perissocerus plumicornis 5,p. 2. Dolichomitus longicauda 2 > 412. p_ 412. 3 a. Antenna of Perissocerus, mag- 2 a. Abdomen of Dolichomitus. nified. 4. Metopius sinensis 2, P- 411. 5. Notes on the Anatomy and Systematic Position of the Genera Thinocorus and Attagis. By A. H. G A R R O D, M.A., F.R.S., Prosector to the Society. [Received April 17, 1877.] Through the kindness of Mr. Edward Gerrard 1 have become possessed of an adult specimen of Thinocorus rumicivorus, and of a |