IOO THE BIOLOGICAL REVIEW. 



solidagos, I have frequently counted, at one time, thirty-five 

 bees being eaten by the bugs. With the assistance of Reduvius 

 raptatorions the erosa must have kept the hives in the neighbor- 

 hood rather thinly populated. Beside the usual variety of bees, 

 their prey included over fifty species of insects. It speaks well 

 for their courage when such powerful hornets as Ammophila 

 luctuosa and A . conditor are numbered with the victims. One 

 rather amusing habit they had was the way in which they kept 

 watch on the curious observer. In only one instance did I see 

 an insect captured ; it was a specimen of Agrotis subgothica. 

 The bug seized the moth by the front of the head and plunged 

 its probosis into the thorax — Mr. Agrotis fluttering and beating 

 about on the blossom for nearly a minute before death relieved 

 his sufferings. Appended is a list of the prey of P. erosa and a 

 shorter one of that of R. raptatorious : — 



LIST OF THE PREY TAKEN BY P. EROSA LINN. 



Coleoptera. 



Chauliognathus pennsylvanica 



Geer. 

 Cyllene robinias Forst. 

 Diabrotica 12-punctata Oliv. 

 Mordeliistena vitis Lee. 



Hymenoptera. 



Apis mellifica B. Drury. 

 Apis mellifica Syr Drury. 

 Bombus pennsylvanicus Dc Geer. 

 Andrena vicina Smith., 

 Andrena sp. 

 Halictus pilosus Smith. 

 Halictus lsevissimus Smith. 

 Halictus parallelus Say. 

 Agapostemon radiatus Say. 

 Ceratina dupla Say. 

 Vespa vulgaris Linn. 

 Polistes sp. 



Odynerus capra Sauss. 

 Philanthus solivagus Say. 

 Philanthus bilunatus Cress. 

 Cerceris nigrescens Smith. 



Stigmus fraternus Say. 

 De Oxybelus brodiei Prov. 

 Crabro 6-maculatus Say. 

 Thyreopus la'ipes Smith. 

 Lyroda subita Say. 

 Larra abdominalis Say. 

 Pompilus cylindricus Cress. 

 Ammophila luctuosa Smith . 

 Ammophila conditor Smith. 

 Smiera canadensis Cress. 

 Ceratosoma fasciata Cress. 

 Pimpla pedalis Cress. 

 Lampronata americana Cress. 



'Lepidoptera. 



Pieris rapse Linn. 

 Colias philodice Godt. 

 Chrysophanus hypophleas Bd. 

 Phamphila (two species). 

 Agrotis subgothica Haw. 

 Agrotis volubilis. 

 Nephelodes minians Gnen. 

 Orthosia ferrugineoides Gnen. 

 Plusia precationis Gnen. 



