348 Messrs. R. S. Bjigiiall and J. W. ][. Harrison's authors and requiring confirmation (see italicised names in Collin, 1904) are enclosed in square brackets. Although most of Walker's species are capable of being correctly assigned to Kieffer's genera, as species they are insufficiently defined and thus unrecognisable by students; they are therefore neglected here. By keeping in close touch with each other we have been able to duphcate the records of very many of the most interesting occurrences; in fact, the wealth of records is a welcome feature. Except where a name is added all records are our own; outside the Northumberland and Durham area the first-named author is almost entirely responsible for the records from Lancashire and Cheshire (see Bagnall, 1917-1), and the few from Cumberland and AVestmoreland, and from Redcar and Leeds, whilst the second-named author is similarly responsible for the Cleveland area. Yorkshire. We also add Mr. Burkill's Yorkshire records (Burkill. 1916, 1917). An asterisk in the main list denotes species not shown in the lists of Collin, 1904, and Swanton, 1912. CONTENTS L Classified List of British Cecidomyids with North of England Records . . pp. 348-411 IL Check list of named species . . pp. 411-417 III. Index to Host-plants . . . pp. 417-422 IV. Literature; references in brief . pp. 4'2 2-426 I. Classified List of British Ci:cidomyidae with North of England Records. Sill. family CECIDOMYINAE. Group Lasiopterariae. Clinorrhyncha H. Loew, 1850, p. 21. *]. C. chrysanthemi 11. Loew, 1850, p. 39; KiefTer, 1913-2, J). 19. Affecting achenes of Matricaria inodora and Anlhemis Cotiila. See Houard, 5722 and 5665. Records from all counties excepting Westmoreland. i
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