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Show 1902.] SPIDERS FROM BORXEO AXD SIXGArORE. 2 6 5 VI. RHYNCHOTA AS MIMICS, a. Rhynchota Hemiptera. i. Mimic. A Keduviid, sp. Model. Bracon, sp. The bug has the elytra, wings, and dorsal surface of the body reddish ochraceous as in certain common Braconidfe ; the abdomen beneath is white; the apex of the coriaceous part of the elytra is black, thus resembling the black stigma on the fore wing of the model; while both elytra and wings are suffused with fuscous as in the model. So perfect is the resemblance between the two species that the bug was placed in a cabinet together with several other Hymenoptera, and the mistake was only discovered quite recently whilst attempting to arrange the museum collection of Braconidse. Another species, probably of the same genus of bug, mimics another similarly coloured species of Bracon in the same manner as above described. [See also under section Convergent Groups for other examples of mimetic Hemiptera.] /3. Rhynchota Homoptera. ii. Mimic. Issus bruchoicles (Wlk.). Plate X IX . fig. 10. Model. Alcides, sp. (Curculionidse.) Plate X IX . fig. 9. This remarkable little Homopteron, one example only of which is in the British Museum from Sumatra, occurs not uncommonly at Kuching on fallen logs or on living wood, whilst the Weevil is frequently found beneath the bark of fallen logs, sometimes in the very logs on the surface of which is found the mimic. The whole appearance of the mimic with its hard convex elytra and deceptively powerful legs is very weevil-like, and the resemblance was evidently noted by the describer. The fore legs are much flattened and in side-view correspond closely in appearance to the powerful fore legs of the Alcides (compare figs. 9 & 10, Plate XIX.). VII. SPIDERS1 AS MIMICS. i. Mimic. Cyrtarachne conica (0. Pickard-Cambridge). Model. A mollusc. The abdomen of this Spider is many times larger than the cephalothorax and is dorsally produced into a cone, which appears as if tilted backwards. The colour of the abdomen is creamy or yellowish white, marked with fine black and greenish lines and mottlings, arranged in a somewhat concentric manner so as to 1 The Spiders here noted were described in P. Z. S. 1901, i. p. 11 et seq. pi. v. Cyrtarachne conica was wrongly recorded as occurring in Singapore. |