252 



I November, 



In P. fraxini the forceps iii the lateral aspect are in the form of 

 an irregular triangle attached by the apex, the free angles are rounded 

 and inflexed, on the inner side the front one has some long hairs and 

 the hinder one a few black spinose teeth ; on the basal half of the inner 

 side near the middle there is a feeble simple ridge. Psyllojisis meliphila 

 is an entirely pale species like P. fraxinicQla ; the forceps, in the lateral 

 aspect, are about half as high as the genital plate, the hinder edge is 

 feebly convex and tlie front edge is produced into a large rounded lobe : 

 P. discrepans is a strongly marked insect closely resembling P. fraxini 

 and P. distinguenda, but is readily known by the form of the forceps, 

 which, in the lateral aspect, have the appearance of a parallelogram 

 supported by a very short and thin stalk. 



a. Psyllopsis distinguenda, elytron. 



b. ditto cephalad aspect of male 



genital segment (diagrammatic). 



c. Psyllopsis fraxini, ditto 



Colesborne, Cheltenham : 



October lUh, 1913 



