J UNE, 1915. 



KNOWLEDGE. 



163 



Figure 132. Incompletely expanded fructifi- 

 cations of " The Pricl<ly Cap " {Pholiota 

 squarrosa) protruding from a hole in a hollow 

 tree. 



Figure 134. The Birch Polyporus {Polyporus 

 bctuliniis) is a destructive parasite. 



Figure 133. The speciuieu sliown in Figure 

 132 after its removal from the tree. 



I'iGliRE 135. The Caterpillar V\\ng\\s(Cordyccps 



inilitaris) X 2, which grows parasitically on the 



larvae of butterflies and moths. 



