98 THE LEPIDOPTERA OF ESSEX. Common in most woods in the county and in shady lanes and about hedgerows on their outskirts ; generally distributed, but not everywhere, mostly local. Quite absent now in Colchester district where it was formerly common. Mr. Harwood has not seen one for about ten years. [Still very common in Monks Wood, Epping Forest, B. G. Cole.] Pararge megaera, L. Wall. Geographical Distribution—Europe (except polar regions), North Africa, Asia Minor, Armenia. Throughout Britain. Larva—Apple-green, dark-green stripe on back, two paler green stripes on sides ; head bright green. Food—Grasses. Imago—May and June, August and September ; hibernates as larva ? or pupa ? (see Entom. xii. 3, 57 ; Larvae, p. 165.) Abundant; flying along every hedge in the county in the summer. Satyrus semele, L. Grayling. Geographical Distribution—Europe (except polar regions), North Africa and West Asia. Throughout Britain, but local. Larva—Light brown or drab, dark olive-brown stripe on back, three brown stripes on side edged with white; head brown. Food—Grasses, especially Triticum and Aira. Imago—July ; hibernates as larva. Very rare and local ; on dry hill-sides, but generally confined to chalk or limestone soils. Lexden Heath (Jermyn, V.M. 71), probably now extinct in this locality as Mr. Harwood has only taken two or three stragglers near Colchester ; he has taken several at Birch Wood, Dedham. Common on Tophill Heath (E. H. Burnell ; M.N.H. [2] i. 602). [This is probably a misprint for Tiptree Heath, where it is now extinct.] Felsted (Rep. F.S.N.H.S. ii. 44). It should, and probably does, occur in the extreme north-western corner of the county, on the chalky uplands of the Saffron Walden district, but I find no records. Mr. G. N. Maynard writes, "There are several 5. semele in the 'old collection,' Saffron Walden Museum, which I believe were taken in this neighbourhood." Epinephele janira, L. Meadow Brown. Geographical Distribution—Europe (except polar regions), North Africa, West Asia. Throughout Britain, our commonest butterfly next to P. rapae. Larva—Green, darker line on back, pale yellowish stripe along spiracles; head green, anal points pink. Food—Grasses. Imago—June and July; hibernates as larva. Very abundant in all meadows, as everywhere.