Fig. 99. — ^Nest of hornet, Vespa crabro, in vertical section. It was suspended from a slate 

 roof, AR. The top of the primary central support is seen at T. There are six tiers of 

 combs (1-6). Round the central comb of the sixth tier, there are four combs, the 

 structure of which is shown at the side, B C D E. V, the entrance. P, the road to the 

 nest, along the beam F, is marked by the dotted line. A short cut has been formed at 

 L, which represents two triangular paper screens. M, part of the gable wall. As the 

 situation was a very warm one, the wall of the nest had only one thin envelope (env). 

 (After Janet.) 



