1915.J 261 



of the weather experienced during the seasons in question, together 

 with any agricultural changes which have taken place, such as afforesta- 

 tion, cutting of timber, change of crops, cleaner or dirtier farming 

 and forestry, opening of new industries, etc. In certain districts, 

 owing to the conversion of what has been a purely agricultural area 

 into a colliery district, e.g., Doncaster, Kent, and perhaps, shortly, 

 Selby, there is an excellent opportunity to test the effect of smoke and 

 dust on plant and insect life hitherto unaccvistomed to it ; here much 

 good work has been done under the original conditions, to quote only 

 cases within my own personal knowledge, by Dr. Fordham at Bubwith, 

 near Selby, and Dr. Corbett, at Doncaster, but the scheme is too wide 

 for one man and should be taken up in co-operation by as many 

 workers as possible, and here great assistance can be given by the 

 Field Clubs which are doing so much good local work throughout 

 the country. 



166, Bede Burn Eoad, 



Jarrow-on-Tyne : 



June loth, 1915. 



PRELIMINARY NOTES ON BRITISH CAMPODEIDAE (THYSANUBA), 

 AND A PLEA FOR MATERIAL. 



BY RICHARD S. BAGNAIX, F.L.S. 



For long Zoologists were content to regard Scuticferella immaculata 

 to be our only representative of the Symphyla, and, in the same way, 

 Campodea staphyiinus occupied that position in the Campodeidae. 



We now know 14 different species of Symphyla, and in working 

 at that group I became convinced that Campodea would similarly 

 repay study. This has proved true, and in 1912 Silvestri* published 

 an account of some European species, 15 in all, of which 12 (with 

 three sub-species) are referred to the genus Campodea, and three to 

 Plusiocampa Silv. Of these, C. lubbocki Silv. and C. lankesteri were 

 described from British examples only, the former from Berkhamsted 

 (Collinge) and Oxford (R.S.B.) and the latter from Berkhamsted 

 (Collinge) . 



From the few specimens collected casually by myself I have 

 identified the following, of which C. fragilis, C. giardi, and Plusio- 

 campa sp. are additions to our known fauna: — 



* Boll. Lab. Zool. Agr. Portici, VI, pp. 110-147. 



