12 BRITISH GALL-INSECTS. 



CECIDOMYID^. 



Mr. Hardy has published in the Scottish Gardener, 1854, 

 Tol. iii. numerous observations on Gall-midges.* Two years 

 later, Mr. Francis Walker's " Insecta Britannica — Diptera," 

 vol. iii. appeared, giving a list of Mr. Hardy's species, as 

 well as an extensive enumeration of other Gall-midges, in- 

 habiting or supposed to inhabit Britain. A compilation of 

 this sort is very valuable as a guide of what to search for ; 

 but for faunistic purposes, it is without value, inasmuch as the 

 author himself candidly declares, that '' only a few of the 

 British species have as yet been observed, and it is difficult 

 to identify them with most of the published descriptions, and 

 I am not able to refer to collections for specimens of them" 

 (loc. cit. p. 73). Under these circumstances, the most 

 prudent course to take seems to give only such species as 

 have come under my own observation or that of friends, and 

 to wait with the rest until they occur to other observers or 

 myself. Most of Mr. Hardy's species also I shall leave 

 out until I am able to compare his papers with the works of 

 foreign Entomologists. In the perusal of the following list, 

 it should be well borne in mind, that only gall-producing 

 midges are mentioned, to the exclusion of such as live 

 parasitically, or as inquilines in or under galls. 



Schiner's arrangement, as given in his ^'Diptera Austi'iaca," 

 is followed here. Heferences are only quoted to the British 

 literature, so far as it is accessible to me. 



Cecidomyia. 



37. rosaria, Loew (Hard}-, Ann. of Nat. Hist. vi. pp. 182 

 et seq. = C. cinerarum). 

 On several Salices.—" Bose-willow." 



* I have net been able to procure this volume, and should feel obliged 

 to any friend in the North, who could get it for me at a fair price. 



