320 PROCEEDINGS OF THE 



Mr D. C. Glen, F.G.S., exhibited a number of varieties of coloured 

 sand, which were obtained by Mr James Albert Smith, C.E., 

 during the progress of some engineering operations near Ruther- 

 glen, in the old raised sea-beach beds that fringe the shores of 

 the Firth of Clyde at the height of 40 feet above the present sea- 

 level. The sands, which were of varying colours, from yellowish- 

 white to orange-brown and black, the latter yielding magnetic 

 iron ore in small grains, had evidently been deposited while the 

 sea stood at this former level, as is testified by the occurrence of 

 marine shells in the deposit, such as the common whelk, Littorina 

 littorea and Turntella communis. The beds have also yielded the 

 hinder portions of the skull of a horse, and fragments of ancient 

 pottery. 



Mr Peter Cameron exhibited some new or little-known British 

 Hymenoptera, which he described in detail. The collection 

 contained specimens of Nemahis diihius, Cam., a new species of the 

 gall-making group, having close affinity with N. j^edtmculi, but 

 readily distinguishable from it ; N. strongylog aster, Cam., a very 

 distinct form, not readily referable to any of the groups into 

 which the genus has been split up; N. crassiventris, Cam.; JV. 

 turgidus, Zad. ; N. arcticus, Thom.;; iV". flacidus, Cam. ; Tenthredo 

 lachlaniana, etc. 



PAPER READ. 



On the British Phytophagus Hymenoptera. By Mr 



Peter Cameron. 



In this paper were enumerated all the British species of the 

 Linnean genera of Tenthredo, Sirex, and Cynics. About 460 

 species were included in the list, this being more than the number 

 recorded in previous catalogues, in which more than half the 

 species are wrongly identified. As the number stands at present, 

 it compares favourably with that recorded for Continental 

 countries. 



February 26th, 1878. 



Professor John Young, M.D., F.G.S., F.RS.E., President, in 

 the chair. 



Messrs. Archibald Campbell and James Archibald Ferguson 



