376 



[NSECT ARCHITECTURE, 



fK ^ 



Bedeguar gall of the rose, produced hy Cynips Rosa. 



The gall-fly of the willow (Cynips viminalis) de- 

 posits, as we have just seen, only a single egg on 

 one spot; but the bedeguar-insect lays a large cluster 

 of eggs on the extremity of a growing branch of the 

 wild rose-tree, making, probably, a proportionate 

 number of punctures to procure materials for the 

 future habitation of her young progeny. As in the 

 former case also, each of these eggs becomes (as we 

 may suppose) surrounded with the sap of the rose, 

 enclosed in a pellicle of gluten. The gluten, how- 

 ever, of the bedeguar insect is not, it would appear, 

 sufficiently tenacious to confine the flowing sap 

 within the dimensions of any of the little clustered 

 globes containing the eggs, for it oozes out from 

 numerous cracks or pores in the pellicle; which 



