Brenthia yangi sp. nov. and its immature stages (Lepidoptera: Choreutidae: Brenthiinae)

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.