Acrocercops brongniardella (Fabr.) NRR., 1846-(1903). Quercus. Probably extinct in Essex. VC 18.49 *Hainault Forest, 27 Sept. 1846 by G. Bedell (Stainton, 1848); 70 Danbury by. GHR (VCH). Leucospilapteryx omissella (Staint. Res., 1903-1980. Artemisia vulgaris. Loc. c; v. loc. abdt. 98 *Shoebury (Whittle, 1904b). Lithocolletinae This subfamily consists in Britain of a single genus of small, pretty moths with a characteristic pattern of white strigulae on an orange or golden brown background; in some species the white is extended to take over as the ground colour. The larvae start feeding in a similar manner to the Gracillariinae, but all remain in their mines throughout the larval stage. Spinning within the mine causes the epidermis of the leaf to contract, arching the leaf to form a hollow chamber. With rare exceptions, the side of the leaf mined by each species is constant. Pupation takes place within the mine. Two British species mine the tender bark of twigs. 40 out of the 52 British species have occurred in Essex and one or two others could be present. The majority can be recorded from their early stages but those mining sallow or apple, and some of those mining oak, can be determined only from adults and in consequence are under-recorded. Phyllonorycter harrisella (Linn.) Res., 1879-1980. Quercus spp. Wdspd and abdt. 49 *Epping Forest (Machin, 1880b). P. heegeriella (Zell.) Res., (1903)4980. Quercus spp. Wdspd and loc. c. 02 *Colchester (VCH). P. tenerella (Joan.) Res., 1850-1979. Carpinus. Wdspd and c. 48 *Wanstead (Stainton, 1850c). P. saportella (Dup.) NRR., (1903). Quercus spp. V. loc. and r.; perhaps extinct in Essex. VC 19.02 Colchester (VCH and a specimen taken by A.F. Griffiths in the Cardiff Museum). P. quercifoliella (Zell.) Res., 1866-1980. Quercus spp. Wdspd and abdt. 49 *High Beach (Boyd diary). 49