INSECTS sweeping, only one species, Ccecilius pedicularius, Linn., being taken also on the wing. The genus Psocus is represented by Ps. longicornis, Fabr., recorded from Mickleham and Box Hill (Ashdown) ; Ps. nebulosus, Steph., from Leatherhead (Ashdown) and Bookham Common (Briggs) ; Ps. fasciatus, Fabr., from Cobham and Ockham Common (Briggs) ; Ps. sex- punctatus, Linn., from Leatherhead (Ashdown) ; Ps. major, Kolbe, from Bookham Common (Briggs). Stenopsocus immaculatus, Steph., has been recorded from Wisley and Leatherhead (Briggs) ; St. stigmaticus, Imhoff, from Reigate and near Chertsey (McLachlan) ; St. cruct'atus, Linn., near Ranmore (Lucas) and Leatherhead (Briggs). Caecilius pedicularius, Linn., is frequent in houses, especially on windows, but occasionally flies in bright sunshine in great numbers ; C.Jtavidus, Steph., near Ranmore (Lucas), Bookham Common (Briggs) ; C. atricornis, McLach., Chertsey Bridge (McLachlan) ; C. da/ii, McLach., from Weybridge (King) ; and C. piceus, Kolbe, Box Hill (King). Peripsocus alboguttatus, Dalm., was beaten in some numbers from heath at Weybridge in 1873, but does not seem to have been taken since. Elipsocus unipunctatus, Mull., occurs at Bookham Common (Briggs) and Esher Common (Lucas) ; E. west- woodii, McLach., and its variety, abietis, Kolbe, is not uncommon round Leatherhead ; E. Jlaviceps occurs sparingly at Bookham Common (Briggs) ; and E. cyanops, Rost., is found at Leith Hill. Another much neglected group, the Per/ida, seems to have been very little worked in the county, and records are practically non-existent. Dictyopteryx microcephala, Pict., is found on the Thames in spring. Chloroperla grammatica, Poda, occurs along the banks of the Mole in the Leatherhead district, where also Isopteryx tripunctata. Scop., and I. torren- tium, Pict., are common. Leuctra fusciventris, Steph., is common in suitable localities ; L. geniculata, Steph., is found on the Thames. Nemoura variegata, Oliv., occurs in profusion at Wisley Pond, Esher, Byfleet, Bookham Common, etc. ; j!V. meyeri, Pict., is found sparingly at Leatherhead, Bookham Common, etc. ; a solitary specimen of N. avicu- laris, Morton, was whipped off a reed in the canal at Byfleet ; and N. inconspicua, Pict., has been taken (Lucas) at Esher in May and Sep- tember. The Ephemeridce, the third of the ' neglected ' groups, has been but little more worked or recorded than the others. Ephemera vu/gata, Linn., and E. danica, Mull. the May-flies par excellence of anglers are of course in the utmost profusion, though not often together, the former requiring warmer water temperature than the latter. The scarce E. /ineata, Eatn., has been taken near Kingston-on-Thames in 1901 (Lucas). Potamanthus /uteus, Linn., has occurred at Weybridge (McLachlan). Leptopblebia submarginata, Steph., is not uncommon at the White Falls Leatherhead (Briggs) and Esher Common (Lucas), while L. marginata, L., occurs at Byfleet Canal (Lucas). Habropblebia fusca, Curt., has been taken at Newark Abbey, Box Hill and the White Falls, at which place also Cam's dimidiata, Steph., Ephemerella ignita, Poda, BaStis vernus, Curt., B. rt>odani,Pictet, Centroptilum pennulatum, Eatn., and Cloton rufu/um,MuL, also occur. Centroptilum luteolum, Mull., at Esher (Lucas), CloHon simile, Eatn., 77
