JJq. 1. ] New Gall-making Aphid. 73 



ino 1 in the dry bed of abroad stony ravine about 3,000 feet above sea- 

 level near Harnai in the Sind-Peshin section of the North-Western 

 Railway. " Almost every tree had a dozen or more of these galls 

 towards the extremities of the branches. They were in every stage ; 

 some empty, some opening, and the flies swarming out "; some still with 

 the immature insects enclosed. 



The galls which I examined in December contained only a few pupa? 

 and larvae The grey mass before noted is nearly insoluble in water, 

 but nevertheless it had a soapy flavour on the tongue. 



Two of the excrescences contained also the caterpillar of some lepi- 

 dopterous insect, each entangled in its own web. 



They were quite lively and fat, about three-quarters of an inch long, 

 and did not appear famished, although they cannot have eaten green 

 food for many previous weeks. It is not very likely that they consumed 

 the aphidis imprisoned in the galls. 



In conclusion, I may note that the European Pewphigiis comienlarius 

 of Pusserini constructs a long bean-shaped gall with a pointed top. It 

 has been figured by M. L. Courchet in " Etude sur les Galles produites 

 par les Aphidiens/' Montpellier 1879, see part 1, figure 4. He says 

 this structure does not exceed in size that of a haricot-bean. Figures 

 also are given in this same memoir of the antinnse and the wings. In 

 all these particulars P. cornicularius differs from the Indian Pemjihigus, 

 although both feed on different species of Pistacia, and have a close 

 affinity. 



Haslemere. 

 16 January 1892. 



