most marked in the east: 40 Parndon Wood NR, 1977 (VV); 51 Hatfield Forest, 1982 (JF); several, 1983 (JW): 71 Newland Grove NR. 1983 (RW); 92 Berechurch, 1982(JY); 01 offshore, between Bradwell-on-Sea and Colne Point, rescued from the sea, 1980 (MC); Fingringhoe Wick NR. 1981 onwards (LF); 11 St Osyth, 1980 onwards (RWA); 13 Stour Wood, late 1970s (JBF); 22 Walton- on-the-Naze, 1982 (JKW); 23 edge of Copperas Wood, 1983 (MEA). Lasiommata megera (Linn.) (Pararge megera) The Wall p26. Resident, widespread and common. This brown is generally distributed and, as a rule, is common. Following the drought summer of 1976 it suffered a spectacular decline but it had staged a full recovery by 1979. Melanargia galathea (Linn.) Marbled White p28. Resident, very local and scarce. Always virtually confined to the south of the County, this graceful butterfly actually extended its range about 1950. appearing north of the River Crouch and, further west, in the Brentwood and Ingatestone areas. Before 1960 a steady decline and contraction of range set in, and for some years it has survived, in perilously low numbers, only in a very few restricted localities in the Rochford Hundred *. 01 West Mersea, a vagrant in a garden on buddleja, 1976 (per TB). Hipparchia semele (Linn.) (Eumenis semele) The Grayling p27. Resident, now very local and rare. Occasional wanderers apart, this species has always been confined to parts of N.E. Essex (save that from 1948-53 it was found on the south shore of the Blackwater estuary at Bradwell-on-Sea) and isolated but strong colonies existed at Fingringhoe Wick and Colne Point NRs *. Since the mid-1960s it has declined dramatically and now seems to be confined to the area immediately south of Colchester (92,02) where its numbers appear to be very low indeed., although two unconfirmed reports from the north-east are being investigated. Pyronia tithonus (Linn.) (Maniola tithonus) The Gatekeeper p28. Resident, widespread and very common. This species is universally distributed except in the extreme south-west and in some years approaches abundance in particularly favoured localities. At the present time it is probably our commonest butterfly. Maniola jurtina (Linn.) Meadow Brown p27. Resident, widespread and common. Generally distributed but, although still common, this well-known species is far less numerous than formerly. The loss or spraying of hayfields has, perhaps, contributed most to its decline. Coenonympha pamphilus (Linn.) Small Heath p28. Resident, widespread and locally common. This small brown butterfly has also suffered from loss or deterioration of suitable habitat but is still common in many grassy and heathy places. Aphantopus hyperantus (Linn.) The Ringlet p28. Resident, widespread and locally common. Found in woodland over much of the County, and here and there in less well-timbered districts. Generally less in evidence than in the past but still common in some localities. 50