Insects, etc.. Injurious to Nuts. 305 



of the surface and ou the apex. The eggs are laid in small slits in 

 the veins of the leaf. 



The larvte are found in July and August (and according to 

 Cameron to the end of September). The latter statement undoubtedly 

 applies to two broods. When first hatched they are semi-transparent, 

 and become greenish with brown head. In ten days the larvte were 

 found to have moulted, and then they became pale yellowish-green, 

 with the anal segment dull yellow, and two dusky stripes on the sides. 



When mature the larva is greenish-blue, and the second and 

 anal segments bright yellow ; over each spiracle, which is dark, is a 

 dusky spot; below each spiracle, one large and two small dark spots, 

 and over the legs four black spots and some lines. The cerci are 

 black, and on the anal segment is a black spot of rough triangular 

 shape. The legs are greenish-grey with brown apices, and the prolegs 

 pale green. On the venter of the fifth, seventh, eighth and ninth 

 segments is a large yellowish gland, and a smaller one ou the fourth 

 and tenth, which can be protruded at will. The larv?e feed in groups 

 of three to ten, usually in a row near or on the edge of a leaf, and 

 hold on by their true legs, the body being turned into all manner of 

 shapes and freely swung over the attached portion. 



When mature they fall to the ground and spin a brown cocoon 

 of a long form, and somewhat parchment-like formation, and then 

 they pupate. From these pnpie a second brood appears in August, 

 and lay their eggs just as the first. The imagines have been seen as 

 early as the 2nd of August. The larvie of the second brood all remain 

 in the larval state during the winter and pupate in the spring. 



Mr. Buley has definitely traced two broods {;Z). The second 

 brood went to earth in September. 



Natural Enemies. 



Numerous Ichneumon and other parasites attack this sawfly. 

 None have been bred from specimens collected in Kent, Surrey or 

 Cambridgeshire. Cameron gives the following list : Tryphon gibhus, 

 Eatz. ; Mesoldus mdanclwlims, G. ; M. septentrioncdis, Eatz. ; M. sex- 

 lihtratus, Grav. ; PolyspMndus areolaris, Eatz.; Mesoleptus testaceus, 

 Gr. ; Pim2)la angeus, Gr. ; Ichneutes rcunior, Nees ; and Biicmyat^fer 

 alvearius, Spin. 



Geographical Distribution. 



In Britain I have found or received larvee from Hereford, 

 Warwickshire, Kent, Surrey, Middlesex, Hampshire, Devon and 

 Somerset. 



X 



