Argopistes coccinelliformis Csiki, 1940

Fig. 9 A, B

Host plant.

Oleaceae: Ligustrum micranthum Zucc., L. ovalifolium Hassk. Ligustrum japonicum Thunb., Osmanthus heterophyllus (G. Don), O. insularis Koidz., O. × fortunei Carr. are also recorded as adult hosts (Kimoto and Takizawa 1993). In Ogasawara Islands, this is the only leaf-mining chrysomelid species.

Leaf mine.

Full-depth linear mine on young leaf (Fig. 9 B). The egg is laid on leaf margin, and the hatched larva mines adjoining along the leaf margin or its mine. Frass is thread-like, deposited along the middle line of the mine. The fully grown larva exits the mined leaf, falls to the ground, and pupates underground.

Material examined.

• 3 adults, Rinkai, Shirahama, Nishimuro-gun, Wakayama Pref., 13-V-1998 (as larva on Ligustrum ovalifolium), emerged on 2-VI-1998 (Fig. 9 A, B) ; • 1 adult, Mukô-jima Is. Ogasawara, Tokyo Pref. on Ligustrum micranthum .