Galls caused by the larvae, nymphs, and imagines of 

 Eriophyes similis Nal. 



on 



the leaves of Prunus spinosa Linn. 



PLATE 65. 



Synonymy of Mite. 



Cephaloncoii hypocrateriforine Bremi. 

 PhytopUis attenuatus Murr. 

 „ similis Nalepa. 



Habitat of the Sloe-tree. — Abundant in Britain, in a 

 wild state, in hedges, thickets, and open woods ; cultivated 

 in almost every orchard. 



Position of the Gall. — Principally on the upper surface 

 of the leaves. 



Manner of Growth.— Gregarious ; pubescent. 



Colour. — Greenish yellow, yellow, orange, purple. 



Average Dimensions of a Mature Specimen. 

 Height, 2 mm. ; girth, 6 mm. 



May be sought during the months of May to October. 



The Growth is complete by the end of August. 



These galls occur also on the leaves of the plum, greengage, 

 damson, and bullace, and are all so much alike that illustra- 

 tions of each are not necessary. On some leaves they are so 

 numerous as to cause considerable distortion. The largest 

 number the author has seen on one leaf is fifty-four. They were 

 distributed all over the leaf and also along the margins. The 

 leaf measured 65 mm. long and 35 mm. broad. The aperture 

 of the gall is in the under surface of the leaf ; it is irregular 

 in outline, and is fringed with very fine hairs. 



The illustration is of specimens gathered at Hastings by the 

 author. 



162 



