21. marshes. It is likely that Essex is its last remaining haunt and the Essex Naturalists' Trust is doing its best to prevent it from dying out altogether. Of the butterflies, I can only think of one green species and that is the Green Hair- streak. Only the undersides are green, the upper surfaces of the wings are brown. The species is locally common in Essex and has been found at High Woods, Writtle, and a number of other localities. Ron Allen For more information on Essex butterflies and moths see: "A Guide to the Butterflies and Larger Moths of Essex", published by the Essex Naturalists' Trust 1975. ---oOo--- NEW BOOK ON ESSEX Essex - A Guide to the Countryside, published by County Guide publications for the Essex Rural Studies Association. A real mine of information. 100 pages of articles on Essex climate, geology, soils, ponds, plants and animals with lists of museums, country parks, nature reserves etc. We have been waiting for such a book for a long time. It is a well produced "horizontal" paper back on glossy paper and costs £1.50. Available from bookshops or, if you wish any profit ensuing to go to the Essex Naturalists' Trust, obtain it from The Essex Naturalists' Trust, Fingringhoe Wick Nature Reserve, Fingringhoe, near Colchester, Essex.