OF NORTHUMBERLAND AND DURHAM, 225 



as showing how an insect may be introduced by commerce 

 (witness Callidium violaceum), spread, and in the course of 

 time become indigenous to the country. 



Just a few words to show how much working scope there is 

 for coleopterists in our district. Comparatively speaking 

 Northumberland and Durham possess a large beetle-fauna. 

 One thousand five hundred and twenty-seven species were 

 catalogued by Bold, (^) but out of these, owing to erroneous 

 identification, etc., several must be deleted : not a few are 

 very doubtful, whilst a number are introduced species. Up 

 to Mr. Gardner's time the Hartlepool and Tees Valley district 

 was practically unknown, but by his energetic collecting a 

 large number of rare and exceedingly interesting beetles have 

 been discovered (besides introduced species), of which may be 

 mentioned several species of Carabidce, Haliplidce, etc., etc., 

 new to our list, *Aphodhis tesselatus, *Cyrtusa fju'nufa, various 

 Agathidium and Liodes, Anisotoma dtibia, and varieties, \A. 

 badta, *A. punctulata, Gyll. {litura, Steph.), A. calcarata, 

 *A. triepkei, *A. limicollis, '{A. rugosa, Hydnobhis perrtst, 

 H. punctatissimus, and other rarities too numerous to mention 

 here, but which, however, will be enumerated in the Victoria 

 History of Durham (^). Our coastline will yet, I am sure, add 

 many more species to the list, and miles and miles of moor- 

 land, unworked owing to their general inaccessibility, remain 

 to be opened out. For instance, on the moors near Blanch- 

 land, hap-hazard collecting one cold windy day early last 

 April, produced an oil beetle {Mehe violaceus) new to us ; two 

 very nice moorland Coleoptera, "j" Cymindis vaporariortim and 

 f BembidiMtn nigricorne, and a rather nice Hemipteron {\Ztcrona 

 coeruled). 



Again my own district, the Derwent Valley, or rather a 

 small portion of it (by Messrs. Bold and Hardy, one of our best 



(^) A further list of thirty-three additional species was published in the 

 same volume, part ii. (1872), pages 371 to 379, thus making a grand total 

 of one thousand five hundred and sixty species. 



(*) A full account of Mr. Gardner's most interesting captures will, we 

 hope, be shortly published in these Transactions. 



