562 The Insect and Allied Pests of the Hop. [oct., 



be jarred out of the cones. They winter in the beetle stage 

 just as does the former species. 



it seems to conhne its work to hops.* A few remedies were 

 tried in the attack at Ashford, but none were of sufficiently 

 definite value to record. Dusting with sulphur perhaps did 

 the most good. Since that time I have not seen any serious 

 attack, but the beetle occurs in all hop districts. I have been 

 unable to find it in great numbers early in the year. 



The Cockchafer (Melolontha vulgaris, Linn.). 



Two cases only of the attack of this grub on hops have 

 been recorded. Both records were from Kent. In June, 

 i8o,9,f numbers of larvae were sent from Frittenden, which 

 were attacking the roots, and I found them also, in some 

 unhealthy hills near Wye. Knowing the omnivorous 

 nature of this beetle in its larval stage, it is strange 

 that it has not more often taken to this food plant. The 

 larva and beetle are shown in PI. II., Fig. 2A and c, and 

 another allied form (Rhizotrogus solstitialis) (b), which may 

 be expected to be found at any time on hop roots in its grub 

 stage. 



The grubs are white to dirty creamy white, and the 

 swollen end of the body shows the dark intestinal contents. 

 They live for three years in the soil, and feed all the 

 year round in open weather, passing deeper into the 

 earth as the cold approaches. At the conclusion of their 

 larval life they burrow deep into the earth and pupate, 

 usually in the autumn. The Chafer beetles hatch out early 

 in spring, remaining in the soil as beetles for some time 

 before they escape to the surface. Not only were they found 

 cutting the smaller roots and fibres, but gnawing away at 

 the larger roots and the downward tap root. They do not, 

 however, work very deeply in spring and summer, and a 

 dressing of Vaporite soon kills them. Mr. Ernest Green has 

 found in Ceylon that they come to the surface and die in 

 numbers where this insecticide is used, and this is also found 

 to be the case here. 



* Journal S.-E. Agric. Coll. No. 12, p. 63. March, 1903. 

 + Journal S.-E. Agric. Coll. No. 9, p. 41. April, 1900. 



