( lxix ) 



ments seem necessary, to confirm, modify or upset this hypo- 

 thesis. Assuming it to be correct, it applies for the present 

 only to this species, and cannot, of course, without radical 

 alteration refer to those sawflies whose unfertilised eggs are 

 reported always to produce females. 



1. Birch leaf with egg-pockets of Cimbex syl varum. The short lines 

 by the poc' ets are the incisions of entry of the saws. 



2. Hawthorn leaf with egg-pocl<ets of Trichiosoma tibiale. 



Observation Nests op Ants on Battleships.- — Mr. 

 Donisthorpe announced that on some of our battleships 

 the men were much interested in observation nests of ants ; 

 and it was found that the ants were entirely unaffected by 

 the firing of the great guns. 



Papers. 



The following papers were read : — 



" On new and little-known Lagriidae and Pe&ili&ae" by 

 G. C. Champion, F.Z.S. 



" On certain forms of the genus Acraea. A reply to M. Ch. 

 Oberthiir/' by H. Eltringham, D.Sc, M.A., F.Z.S. 



