likely to occur. The larvae of some species mine leaves or stems; others feed externally, in some instances gregariously, in a silken web spun amongst foliage. Pupation takes place either in a stout, boat-shaped coccoon or one of flimsy, network construction. Of the 76 British representatives, 56 have been recorded in Essex and one or two others should occur. Recording is uneven: several species are much more widely distributed than the maps suggest. Argyresthia laevigatella Herr.-Schaff. Res., 1975-1980. Larix. Loc. f.c. wherever the foodplant is well established. 40 *Upshire (DJLA). A. glabratella (Zell.) Res., 1971-1980. Abies. Loc. f.c. VC 18. 70 Little Baddow. VC 19. 52 Broom Wood; 53 *Rowney Wood; 63, 64 Little and Great Bendysh Woods (AME). A. dilectella Zell. Res., 1967-1977. Juniperus, including cultivated forms. V. loc. and r. VC 19. 53 Saffron Walden, formerly in my garden (AME). A. ivella (Haw.) Res., 1849-1980. Corylus, Malus. Loc and r. VC 18. Epping Forest, 1860 (Healy diary), Wormald (1867-1868), Machin (1872-1873b). Buxton, P.A. & Buxton, D.A.J. (1911), 1936 (RGW); *Hainault Forest (Stainton, 1849a); 69 Shenfield, 1936 (RGW); 80 Woodham Walter (AME). A. brockeella (Hubn.) Res.. (1899)-1980. Betula, Alnus. Wdspd and c. 88 *Eastwood (Whittle, 1899a). A. goedartella (Linn.) Res., 1898-1980. Salix. Wdspd and abdt. 88 *Eastwood (Whittle, 1899a). A. pygmaeella (Hubn.) Res., 1898-1979. Salix. Wdspd and c. 88 *Eastwood (Whittle, 1899b). A. arcella (Fabr.) (cornella sensu auctt.) Res.. 1872-1979. Malus. Wdspd and f.c. VC 18.49 *Epping Forest (Machin, 1872-1873b); 58 North Ockendon (DCT); 68 Mucking by CRNB (Pierce, 1918); 69 Shenfield (RGW); 88 Southend (FGW). VC 19.53 Saffron Walden; 54 Little Hales Wood (AME). A. retinella Zell. Res., (1899)-1980. Betula. Wdspd and v.c. 88 Eastwood (Whittle, 1899a). A. glaucinella Zell. Res., 1862-1979. Bark of Quercus spp. and Aesculus. More or less c. (VCH), but recent records suggest that it is loc. and rather r. VC 18. 38 Whipps Cross (AME); 39 Chingford (DJLA); 49 *Epping Forest, 1862 (Healy diary), Machin (1872-1873b); 59 Coxtie Green (PJW); 88 Southend (Whittle, 1915). VC 19. 53 Quendon, 1974 (AME). A. mendica (Haw.) Res., (1834)-1980. Prunus spinosa. Wdspd and v.c. 49 *Epping Forest (Stephens, 1834:248). 56