398 



Insect Pests. 



whilst the fruit became stunted and some of it dropped off. He 

 also describes the webbing and spherical eggs, some white, others a 

 semi-transparent golden hue. 



Whether or not this was the true T. tela ri us I do not know, or 

 whether it was the Hop Eed Spider {T. /na/va:). I have never 

 seen any such attack, and the district where it took place is not 

 recorded. 



The usual Red Spider found on plums is TcnuijMljns rjlaher, which 



lie. //. 



FIG. 265.— KED SPIDER 



(Tetranychus telarius). 



FIG. 260.— RED SPIDER EGG. 

 {T. telarius). 



often occurs in swarms, but I have been unable to trace any damage 

 done by it. It winters in the egg stage as small globular red bodies, 

 often so thick together that the shoots look red. This species forms 

 no web. 



Treatment. 



Would be the same as for the Eed Spider on gooseberry, but they 

 hatch out much later. 



Reference. 

 Whitehead, Sir C. lleport on Insects Injurious to Fruit Crops, p. 107 (1886). 



THE PLUM LEAF GALL MITES. 



{Erio]:)h lies phUwcoptcs, Nalepa, and U. jmdi, Nalepa.) 



Two kinds of galls are often common on the leaves of Prunus. 

 They are produced by gall mites, formerly known as Fhytojitus 

 'pruai and P. attenmUvs, now under the names given above. The 



