June, 1922.] Proceedings of the Society. Ill 



black ant in behavior as well as appearance, was not uncommon. Hiding 

 in the dead leaves and moss among the grass roots he found Ptochiomera 

 ferruginea, a species hitherto rare in collections, Plinthistis compactus, 

 Kolenetrus planus, Xestocoris nitens, Stygnocoris ferrugineus and Trapezo- 

 notus arenarius. In the thick layers of leaves of several years accumu- 

 lation, several other species were found, and in the moss that grew in damp 

 shady spots still more, including the European Sciocorus microphthalmus 

 and Stynocoris rnsticus. Along with these Hemiptera, mostly obtained by 

 sifting, were many beetles which had been turned over to Mr. Notman ; 

 and to take in a single summer five or six rare species in such numbers, 

 Mr. Barber characterized as quite an event. 



Mr. Barber mentioned that the Homoptera shown had been identified 

 by Mr. C. E. Olsen. 



Dr. Bequaert delivered an address on " Hymenoptera Accidentally or 

 Purposely Introduced in the United States " on which subject he said his 

 studies, while still incomplete, showed about 50 such species already, of 

 which 19 were certainly intentional introductions. The difficulty of sepa- 

 rating circuhipolar from introduced species of early date ; the history of the 

 introduction of hymenopterous parasites to combat economic pests ; and the 

 early records of honeybees were given with references to early travels, 

 etc., in which mention of them had been found. The causes which pre- 

 vented rapid dispersal in some instances were discussed by Dr. Bequaert 

 and by several members at the close of his remarks. ' 



