72 THE SCOTTISH NATURALIST 



Colour determined by Blood in Amphipods and Isopods. 

 Dr John Tait shows that' the body colours of Shorehoppers and 

 Amphipods, and to a less extent of Isopocls, depend upon the 

 colour of the blood, which may be greenish, bluish, brown, or 

 violet. White specimens of Gammarus marinus were infested by 

 great numbers of bacteria in the "blood. Proc. Roy. Phys. Soc. 

 Edin., vol. xx., p. 159. 



The Peacock Butterfly (Vanessa 10), near Edinburgh. 

 W. M., in The Scotsman of 16th October 191 7, records the capture 

 of a specimen on the window of his house at Pinkhill, near 

 Edinburgh, on 14th October. Mr K. J. Morton, F.E.S., informs 

 us that Mr W. Mutch, the writer of the note, showed him the 

 specimen the day after it was caught. Records of the occurrence 

 of the Camberwell Beauty near Hawick, on 21st August, near 

 Langholm, and at Juniper Green, Midlothian, on 4th September, 

 appeared in The Scotsman of 8th and 15th September. 



Economic Significance of Holly Tortrix Moth (Eudemis 

 rnzvana). The damage done by the larva? of this pest, as well as 

 a detailed account of its life-history and the results of endeavours 

 to destroy it by insecticides, of which nicotine was found to be 

 most effective, are recorded by Miss L. H. Huie in Proc. Roy. 

 Phys. Soc. Edin., vol. xx., p. 164. 



Beetles in Peeblesshire. James E. Black records Tetratoma 

 fungori/m, on ash log, and Deliphrum crenatum fairly common under 

 beech bark at Stobo. Ent. Mo. Mag., 1917, p. 277. 



Bark - beetles and Forestry. James W. Munro, in an 

 important paper on " The Genus Hylastes and its Importance in 

 Forestry," discusses the structure of the several species of this Bark- 

 beetle and the damage caused to timber by them. Proc. Roy. 

 Phys. Soc. Edin., vol. xx., p. 123. 



Insect Visitors to Corallorhiza innata and other 

 Orchids in the Forth District. William Evans, Trans. 

 Pot. Soc. Edin., xxvii., Part II. (191 7), p. 136. An undescribed 

 Empid fly, Enipis snoivdoniana, Verr. MS., is recorded from Loch 

 Leven (at flowers of the coral-root orchid), 5th June 1908; also 

 from south side of the Pentlands, 27th May 1895, and Bavelaw 

 Moss, 20th May 1904. Sixteen species of insect visitors to other 

 orchids {Goody era rcpens, Lister a ovata, and Orchis maculatd) are 

 enumerated. 



