Insects., etc., Injurious to Nuts. 303 



with lines of minute punctures and rows of bristles between them 

 and a black stripe at the base of the suture of the wing cases. 



There are no wings. 



It is important to note this insect, as in some parts it might 

 invade our plantations from the wild hazels growing near. 



REFERENCES. 



(1) Ormerod, E. A. ' Handbook of Insects Injurious to Orchard and Bush 



Fruits,' p. 118 (1898). 



(2) Taschenberg, E. L. ' Praktische Insekten-kunde,' II., p. 103 (1879). 



(3) Kaltenbach, J. H. ' Die Pflanzenfeinde,' p. 590 (1874). 



(4) Stephens, J. F. ' Manual of British Insects,' p. 245 (1839). 



(5) Fowler, Canon. ' British Coleoptera,' vol. V., p. 189 (1891). 



(6) Schlich (Fisher). ' A Manual of Forestry,' vol. V., p. 194 (1895). 



A SAWFLY (Crcesus septentrional*, Linn.) ATTACKING 

 COB NUTS. 



The large larv;e of this sawfly may often be noticed in nut 

 plantations and in gardens. 



Mr. G. H. Buley of Woodnesborough sent on the 7th of August, 

 1905, a number of sawfly larvse, which he said he had noticed 

 " ravenously devouring the foliage of cob nuts ; about ten of them 

 had completely stripped several boughs, and if they should increase, 

 I fear they will destroy the lot." 



They proved to be Croesus septentrionalis of Linn tens. 



The same species was found doing considerable damage near 

 Maidstone in 1904, and was also observed at Kingston-on-Thames 

 in 1889, where it attacked filberts until they were completely 

 defoliated. The larvas are subject to a very large number of parasites, 

 and it is probably on this account that it so seldom occurs for two 

 or more years in succession. At times, however, it is very injurious, 

 and attacks nuts of all ages. Besides cob, filbert and hazel nuts, it 

 feeds upon birch, aspen, poplars, willow, osier and the mountain ash. 



Stephens records it from the gooseberry, which was considered 

 doubtful by Cameron. They very frequently do so, especially when 

 gooseberries are grown beneath untrained cobs or filberts, as in 

 gardens. 



SYNONOMY. 



This insect has been referred to under the following generic and 

 specific names : Tenthredo septentrionalis, Linn. ; Tenthredo largipes, 



