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thickly encrusted with the Coccid {Mt/tilaspia), known as the 

 " Mussel-scale." The slides showed the trunk at the present time 

 (March, 1922), and during July, 1921, when the aphis and its wax 

 were plainly visible. Galls from the smaller branches, and those of 

 the root form were exhibited at a previous meeting. 



Three slides illustrated points in the life-history of Si/r]>hiis ritri- 

 jjennis. The first showed the newly hatched larva, just over a 

 millimetre long, to show the hatching spines. These spines point 

 back and assist the larva in emerging, by preventing it from slipping 

 back into the egg. They drop off within an hour after hatching. 



The next slide was a curve to show the average number of aphids 

 sucked during the larval period. The number rose from 20 the first 

 day to 110 on the last day of feeding (16th day) ; a drop to 20 

 occurred on the day after the moult, i.e., on the 8th day. 



The third slide was of the first four anterior segments of the full- 

 grown larva, to illustrate the mouthparts, spiracles, etc. 



The final slide was of the underside of a specimen of P. icanis, 

 taken at Fleet, in 1908 ; without spots on the margins. 



Mr. Withycombe exhibited slides illustrating — 



1. An ant apparently pinned by a thorn to the midrib of a leaf 

 underside, which was found in some numbers by Dr. A. Moore in 

 Ceylon. The real explanation is, that the ant on feeling ill from 

 the attacks of a fungus, seizes a projecting midrib of a leaf and dies 

 thus. The fungus then sends out its fruiting spike from the back 

 of the ant's head and from the membrane of the neck, giving the 

 appearance of a thorn. 



2. The nest of Os)ina rttfa (Hym.) in a door lock, found by Mr. 

 Hodson, F.Z.S., at Enfield. It contained over sixty cells in a mass, 

 which was most unusual both as to number and arrangement. 



3. A ? E)npusa paxperata (Orth.) from S. France (sent by Mr. 

 Goodman], and the egg mass laid by the same. 



4. A series of slides illustrating the life-history of Cnnwentzia 

 psociformis {Conio))teriji/idae, "mealy wings "), depicting the cocoons 

 on a tree trunk, the emergence from the pupa, eggs, larvae, pupa, 

 etc. He also showed two colour drawings of larvae of Sciuidalis 

 alenrodeformis and Coniopteryx pyipnaea. 



MABCE 9th, 1922. 



Mr. G. C. Champion, A.L.S., F.E.S., an original member of the 

 Society, was elected an honorary member. Mr. L. C. Bushby, of 



