THIRD SUPPLEMENT 



TO THE 



PRELIMINARY LIST OF THE COLEOPTERA 

 OF THE OXFORD DISTRICT, 



Published in the Report of the Ashmolean Natural 

 History Society of Oxfordshire for 1906. 



By JAMES J. WALKER, Hon. M.A., R.N., F.L.S. 



The net result of two more years (1910-11) of continuous 

 work at the Coleopterous Fauna of the Oxford District is the 

 addition of the very satisfactory number of 127 species, many of 

 them very rare and local, and one well-marked new variety to 

 the Lists already published in our Reports for 1906, 1907, and 

 1909. The total number of species recorded up to the present 

 date (allowing for a few deletions from and corrections to the 

 Preliminary List noted below) is about 1,860, or 54-3 per cent, 

 of the species now known to have occurred in the British Islands.* 

 Thus our District may fairly be regarded as exceedingly rich 

 in this Order of Insects, especially when its inland situation and 

 restricted area are taken into consideration. While definite 

 records of the great majority of the more common and widely- 

 spread British beetles have been obtained, there still remain 

 a good many species, of more or less local distribution, that 

 may reasonably be expected to turn up if the search for additions 

 to our List is continued, and I do not altogether despair of 

 the total number of our Oxford Coleoptera attaining to the 

 round figure of 2,000. As before, I am indebted to Mr. W. 

 Holland, Mr. A. H. Hamm, Mr. H. St. J. Donisthorpe, and 

 especially to Mr. J. Collins, for the records of a very large 

 proportion of the species here enumerated. 



* The number of species in Beare and Donisthorpe's " Catalogue of 

 British Coleoptera " (March, 1904), omitting " introduced " and " doubtful " 

 species, is 3,274, and to these about 150 have since been added, making the 

 total up to the present date 3,420 in round numbers. 



