Insects, etc., Injurious to the Plum. 397 



No wash will kill the adult hoppers on the leaves unless it is 

 so strong that the foliage is destroyed by it. The adults may be 

 caught in large numbers on tarred cloths, stretched on a. light 

 wooden frame and held on each side of the trees, which are then 

 jarred so as to make the insects move from shelter and thus get 

 caught in the tar. This is a laborious undertaking, and is no more 

 beneficial than the washing treatment mentioned. 



Eefbkences. 



(1) Aldrioh, J. M. Cat. N. American Diptera (1905). 



(2) Amyot, C. J. B. Ann. Soo. Ent. France, II. Se. V., p. 280-495. 



(3) Britton, W. E. Report Connecticut Agri. Experiment Station. 4tli Rept. 



State Entomologist. III., p. 216 (1905). 



(4) Collinge, W. E. Reports on Injurious Insects observed in the Midland 



Counties during 1904, p. 13 (1905) ; ibidem during 1905, p. 13 (1906). 



(5) Douglas and Scott. ' Cat. Brit. Hemiptera. Heteroptera and Homopiera ' 



(Cicadina and Phy topthires) , 8vo. London (Ent. Soc.) (1876). 



(6) Edwards, J. ' The Hemiptera-Homoptera (Cicadina and Psyllina) of the 



British Isles.' Pp. 271 + 30 plates. Cr. Bvo. London (1896). 



(7) Oiard, M. A. Comptes-rendus des Seances de TAcademie des Sciences. 



Vol. CIX. July 8 and Nov. 4. No. 19, pp. 708-710 (1889). 



(8) CHllette, C. P. U.S. Nat. Mus. Proc. 20,745 (1898). 



(9) Lethierry, M. ' Catalogue des Hemipteres du Departement du Nord.' 



Hemip-Heteroptera. Misc. IV., p. 361, 8vo. Lille, 1859; 2nd ed., 

 p. 413 (1875). 



(10) Leonardi. ' aii Insetti Nocivi.' Vol. IV., p. 161 (1901). 



(11) MelicJiar, L. ' Cicadinen von Mittel-Europa.' 8vo. Berlin (1896). 



(12) Potts, F. A. Quarterly Journal Microscopical Science. Vol. 50, Pt. 4, 



pp. 599-621 (1906). 



(13) BeJi, Dr. ' Sond fur Pflanzensohutz,' p. 134 and 190. VI. (1903). 



(14) Saunders, E. Entomo. Monthly Magazine, III. N. Se., p. 249 and 



297 (1892). 



(15) Slingerland, M. V. Bull. 215. Cornell Experiment Station, 1904. 



(16) Theobald, F. V. Report on Economic Zoology for year ending April 1, 



1906, p. 76-78 (1906). 



(17) Theobald, F. V. Entomo. Monthly Magazine, vol. III., 2nd Se., 



pp. 40-42 (1892). 



(18) Theobald, F. V. Journal of Economic Biology. Vol. II., pt. 1, pp. 14-25 



(1907). 



THE RED SPIDER ON PLUMS. 



(TetranycJms telarms. Linn.) 



Whitehead (1) describes an attack of Eed Spider on plums and 

 ilamsons which was specially prevalent in 1886. 



The leaves became duller and duller in hue and many fell off, 



