308 



Insect Pests. 



until the spring. They are more flared oiit at the sides than those 



caused by Eriophycs rihis. Ormerod describes the galled buds (1) as 

 drying up and falling off. I have never yet 

 seen this ; old buds of the preceding 3"ear are 

 of common occurrence on the nut. 



The mite is about 0'21 mm. in length in 

 the female, 0*18 mm. in the male. The 

 females lay their eggs in the buds in the same 

 way as the currant species does, and as the 

 old buds decay they migrate to others. In 

 July and August a second growth becomes 

 prominent, easily noticed by their size and 

 often Ijright colouring. 

 The eggs I have 

 found from ^larch until 

 October, more have 

 been detected in the 

 winter. 



Nalepa's figure of 

 the mite is reproduced 

 here. The male is 

 much fatter and rather 

 broader than the 

 female ; in colour they 

 are very similar to the 



Big Bud Mite. On the back are two short 



bristles towards the head, followed by two 



long ones close to them ; then are seen two 



long and two small caudal setre ; ventrally 



are three pairs of short setiie in both male and 



female. The ova are more hen's egg shaped 



than those of £. rihlx. 



Some people whose opinion is of no scientific 



or practical value have stated that this species 



and the one infesting the currant are the same, 



and that currants may become invaded by the 



Nut Mite. One has only to refer to the figure of the former to see 



the great difference so plainly noticeable in the bristles. 



The leaf buds only are attacked at present as far as I know. 



FIG. 207.— THE NUT Bill MITE 



(Eriophyes avellaim) cf . 



(After Nalepa.) 



(Greatly enlarged.) 



Fir:. 20!:!.— THE Nl'T 



BUD 31ITE ?. 



(After Nalepa.) 



(Greatly enlarged.) 



