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A HISTORY OF WARWICKSHIRE ERIOCRANIIDjE Eriocrania Sparmannella, Bosc. Knowle (R. C. Bradley) subpurpurella, Haw. Knowle, Sutton (R. C. Bradley) ; Knowle, Colesbill (Blatch Coll.) unimaculella, Zett. Rugby (N. V. Sidgwick) semipurpurella, Steph. Knowle (R. C. Bradley) ; Coleshill (Blatch Coll.) ; Rugby (N. V. Sidgwick, Rugby lists, 1897) MICROPTERYGID^ Micropteryx aureatella, Sc. (allionella, F.) Sutton (R. C. Bradley) ; near Bir- mingham (Stainton's Manual) ; Rugby (Rugby list, 1867) seppella, F. Knowle (R. C. Bradley); Rugby (Rugby list, 1867) calthella, L. Very common in Sutton Park in the bogs ; also recorded from Knowle (R. C. Bradley) ; Rugby (Rugby list, 1867) DIPTERA I was for a long time very undecided about attempting a list of the Diptera of Warwickshire, and am now far from sure that it is wise to have done so. They are very insufficiently worked, so that it is inevi- table that the list must remain very incomplete, and what is far more important, the difficulties of the order are still so great that it is practi- cally impossible to prevent errors creeping in, and a list that is incom- plete and possibly inaccurate is of very doubtful value. I have however ventured upon the task, and hope it may prove of some value and interest to others attempting to understand these insects. There are not many of our counties in which dipterists have lived and worked, so that it seems a pity, as Warwickshire is one of the few, that an account of its insect fauna should include no reference to the order. So far as I know, no one gave any attention to these insects in the midlands until a few years ago when Mr. R. C. Bradley and I took them up, and so far as I know no one else has yet done so excepting in the slightest degree. This list therefore will be based almost entirely upon the results of our own work. Mr. R. C. Bradley lived for some years at Sutton Coldfield, and collected regularly in the Park, etc., so that he had good opportunities of making an extensive list, and has kindly furnished me with much information which he obtained at that time. I have also frequently collected in the Park, and as neither of us has done more than a little casual collecting in any other part of the county, it becomes almost exclusively a Sutton list. I have therefore only named localities when other than Sutton. We have both of us given a considerable amount of attention to the Syrphida? and allied families, and our work in that section may be taken as probably accu- rate. Mr. Bradley has also made a considerable collection of Tipulidae and its allies in the Park, and as Mr. G. H. Verrall has seen them their names also may be taken as fairly reliable. We have also given attention to various other families which will be found represented in the list, but as I have preferred to omit uncertainties, so as to make it I hope more trustworthy though necessarily shorter and more incomplete, I have entirely omitted any reference to many difficult families such as the Cecidomyids, Mycetophilids, Chironomidas, etc., only mentioning those insects which are the most conspicuous and characteristic, and 158