CATALOGUE OF BRITISH 

 PLANT-GALLS 



THE first catalogue of British plant-galls was com- 

 piled by Albert Miiller, and published in 1872 in 

 the Entomologist's Annual. The gall-causers represented 

 five Orders of Insects in the following proportion : Hymen- 

 optera 36, Coleoptera 9, Lepidoptera 2, Diptera 36, 

 Homoptera 8 — total gi. 



The second catalogue was published twenty-six years 

 later, by Mr, S. L. Mosley, in the Naturalist's Journal, 

 It gave brief descriptions of 197 galls. The causers were 

 arranged under the following headings : Hymenoptera 67, 

 Coleoptera 8, Lepidoptera 3, Diptera 80, Homoptera g, 

 Acari 13, Nematoda 7, Unknown 5. 



No catalogue has appeared since i8g8. Early in 1909, the 

 late Edward Connold published in his " Plant Galls of Great 

 Britain," descriptions of 425 galls. No systematic arrange- 

 ment was attempted, and no effort was made to enumerate 

 all British records. A few galls caused, by fungi were 

 included. In the present catalogue over 800 galls, caused 

 by Insects, Eelworms, and Fungi, are described. The 

 numerical proportion of the causers under their Orders is 

 as follows: Hymenoptera 136, Coleoptera 91, Lepi- 

 doptera 37, Diptera 248, Homoptera 117, Acari 76, Nema- 

 toda 25, Fungi and Mycetozoa 145. About 25 are 

 imperfectly known. 



The great majority of British naturalists possess a more 

 or less intimate knowledge of our native wild plants ; hence 

 the most commendable basis of classification for a catalogue 



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