Abstract
Brenthia yangi sp. nov. and its immature stages are described. The host plants of the new species are Grewia biloba G. Don and its variety parviflora Hand. -Mazz (Malvaceae). The preference for the position of escape holes in the larvae of the new species is revealed by statistical analysis. Larvae of I–II instar have no significant preference for the position of escape holes, whereas larvae of III−V instar significantly prefer to set escape holes along main veins. The size of silken pillar determines the position of escape holes in III−V instar larvae. The corner of two veins is not always the most preferred position for III−V instar larvae.
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