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A REVISION OF THE TRIBE ASPIDIMERINI WEISE (COLEOPTERA-COCCINELLIDAE)

The tribe Aspidimerini Weise consists of certain predacious COCCINELLIDAE which are confined mainly to the Oriental Region. Owing to their usually small size, variable coloration and superficial resemblance to certain other tribes, they have often been misidentified, with the result that it is very difficult to assess from literature the exact role played by them in the control of insect pests. Telsimia nitida Chapin, a member of the tribe Telsimiini, was erroneously (vide Swezey, 1940) called Cyptogonus orbiculus var. nigripennis Weise (a member of this tribe) for a long time even after it had been reported to exercise complete control of Aspidiotus destructor Signoret in Guam (Vandenberg, 1929) and was introduced into Hawaii for the control of Pinnaspis b w i Sch. (Pemberton, 1938, 1939). Another doubtful record to which attention may be drawn here is that of the introduction of Cryptogonus orbiculw (Gyllenhal) from the Philippines into California in 1910 (Essig, 1911), concerning which Smith (1914) remarks that the species actually introduced was perhaps Symnus bipunctatus Klug. Entomologists interested in the biological control of insect pests have often imported from the Oriental Region suitable natural enemies, including Coccinellids. A revision of a tribe confined to this region is therefore of interest not only to systematists but also to economic entomologists. The material on which the present study is based is very extensive and covers a wider range of species than that which has been available to any previous worker on the group. Besides the types present in the British Museum, Crotch’s types at Cambridge and some of Mulsant’s types at Cambridge and Oxford (Hope Collection) have been examined, and almost all the known species and nearly as many new ones are dealt with in this paper. The figures were mostly drawn with the aid of a camera lucida. Those of the entire beetles or of an elytron, although crude and not showing the pubescence and punctation, were drawn mainly with a view to giving the colour-pattern.