Galls caused by the larvae, nymphs, and imagines of 

 Phyllocoptes fraxini Nal. 



on 



the leaves of Fraxinus excelsior Linn. 



PLATE 7 J,. 



Synonymy of Mite. 



Phytocoptes fraxifii Nal. 



Habitat of the Common Ash.— Common in woods, thickets, 

 plantation.s, etc., in dry or damp places, and often in hedges 

 near woods. Distributed very generally throughout Britain. 



Position of the Galls. — The edges of the leaflets. 



Manner of Growth. — The edge of the leaflet curls down- 

 wards and under, the opposite edges meeting at the 

 mid-rib. 



Colour. — Very pale green with purple blotches, ultimately 

 chocolate-brown. 



Average Dimensions of a Mature Specimen (a single 

 roll). 

 Length, 20 mm. ; breadth, 4 mm. 



May be sought during the months of June to October. 



The Growth is complete by the end of August. 



The specimen in the centre of the illustration shows the 

 upper surface of the leaflets ; those on either side the under 

 surfaces. At the left-hand side will be observed one leaflet 

 in which both edges have curled and met at the mid-rib ; it 

 is, however, more usual for only one-half of the leaflet to be 

 rolled. The rolling is very irregular. The ends are open, and 

 other minute creatures find a refuge within, a fact which may 

 have caused these rolls to be labelled, in a public collection of 

 specimens, as " the gall-nidus of Tettigonia ? — sp" 



These galls are often found in company with those caused 

 by Diplosis botularia. 



The illustration is of specimens gathered at Hastings by the 

 author. 



