4 Proceedings of the Biological Society of Washington. 



In the insect list which follows, the species are recorded as 

 breeding in, feeding on and occurring in or on the fungi. It 

 is extremely probable that those listed as occurring in or on 

 are fungus eaters, except those belonging to such coleopterous 

 groups as the Carabidae, and the members of which are pre- 

 daceous. In the fungus list no attempt has been made to 

 record the activities of the insect again and only the names 

 of the species associated with each fungus are mentioned. 



Practically all of the fungi mentioned belong to the families 

 Polyporaceae and Agaricaceae. In the Polyporaceae, "the hy- 

 menial surface is generally spread over the inner surfaces of 

 pores or narrow tubes, sometimes over folds or shallow de- 

 pressions between vein-like reticulations occasionally more or 

 less lamelloid. The sporophores are diverse, generally tough, 

 often very large." 1 In the Agaricaceae, "the hy menial surface 

 is confined to radial plates or lamellae, the latter, however, 

 sometimes in the form of folds or veins. The sporophores are 

 generally fleshy with a definite cap or pileus, usually provided 

 with a central stalk, but also excentric, sessile, etc." 1 Mem- 

 bers of the Polyporaceae are found on both living and dead 

 wood of deciduous and coniferous trees while those of the 

 Agaricaceae are mostly terrestrial or occur as a rule on very 



rotten wood. 



INSECT LIST. 



Order Coleoptera. 



Family Carabidae. 



Pterostichus adoxus Say. On Psilocybe sp., August, Framingham, Mass. 



(Frost). 

 Pterostichus lucublandus Say. On Pleurotus ostreatus, June 27, Corn- 

 wall, Conn. (Chamberlain). 



Family Hydrophilidae. 

 Cercyon praetextatum Say. In Polyporus albellus, Sept. 12, Springfield, 

 N.J. 



Family Silphidae. 



Necrophorus pustulatus Hersch. On Pleurotus ostreatus, June 27, Corn- 

 wall, Conn. (Chamberlain). 



Family Staphylinidae. 

 Gyrophaena corruscula Er. On Armillaria sp., July, Framingham, 



Mass. (Frost). 



1 Duggar, B. M. Fungus Diseases of Plants. 



