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Show 276 MR. R. SHELFORD ON MIMETIC INSECTS AND [Nov. 4, one-fifth from the apex. Prosternum rather strongly tuberculate between the coxae ; the mesosternum with a smaller tubercle on its hinder half. This is the only species of the genus known to me in which the sternal processes are distinctly tuberculate. E rythrus biapicatus, sp. 11. (Plate X X III. fig. 19, $ .) Niger, prothoracis disco et elytrorum basi rujis. nigro-vittatis: ■protliorace ruguloso-punctato, sine tuberculis distinctis; elytris dense granulat is, post ice divaricatis, utrisque in spinam parvam terminantibus. Long. 15| ; lat. 3| mm. Hab. Kuching, Mt. Matang, 3600 ft., June 1900. One female example. Black, with the disk of the prothorax and the basal third of the elytra partly red, the red of the prothorax being interrupted by two black bands extending from the front margin, and by a small median spot near the base, while the red on the base of the elytra is divided by a narrow band along the suture, and two wider bands on each side extending forwards and gradually narrowing from the posterior black area. Prothorax rugulose punctate, and showing traces only of the tubercles present in most of the other species. Elytra very densely granulate, the granules bearing very minute black setae, which are scarcely evident except on the rufous areas near the base. Metasternum somewhat similarly granulate to the elytra, and the abdomen much more finely so. Antennae of the female about half the length of the body, with the joints from the fifth to the tenth rather broad, and angulate at the apex on the anterior side. The divergence of the elytra from the suture behind and the granulation of their surface serve to distinguish this species from all those hitherto described belonging to the genus. E rythrus viridipennis, sp. n. (Plate X X III. fig, 5 8.) i\iger, protliorace toto rvfo, elytris viridescentibus aid viridi-cyaneis et opacis; antennis ( $ ) quam corpore paullo brevi-oribus, ( $ ) medium elytrorum vix super antibus, articulis 5° ad 10"® modice dilatatis ad apicem dentatis; proihorace obsolete punctato, supra leviter quadri-nodoso; elytris cre-berrime ruguloso-punctatis, apice subsinioatis ad suturam breviter spinosis. Long. 1 2 -1 6 ; lat. 2 | -3 mm. Hab. Mount Matang, near Kuching in Sarawak (3600 ft. alt.), June 1900. live examples; in the British Museum and Hope Collection, Oxford. Prothorax red above and below, elytra of a dull green or bluish-green colour, all the rest of the body together with the legs and antennae being black. Prothorax indistinctly punctured, furnished with four feeble nodules on the disk, two being near the middle and t\\ o. more widely separated from each other, near |