352 



Annals Entomological Society of America [Vol. XIII, 



Predaceous: Exochomus childreni and Chilocorus bivulnerus. 



At the flowers: PseUiopus cinctiis, Zeliis cervicalis, Alydnus 



•sp., Chauliognathus marginatus, 



Euphoria sepiilchralis, Trichius 

 delta, Trichius piger, Typocerus 

 velutinus, Typocerus lunatus, 

 Ela ph i dion mucronat u m , 

 ■Chlamys plicata, Oxacis thoracica, 

 Rhipiphorus cruentits, Calandra 

 oryzce, Jurinea adjitsta, Spallan- 

 zania hebes, Plagiprospherysa 

 parvipalpis, Orthelia cornicina, 

 Lucilia caesar, Tahaniis mex- 

 icaniis, Tabanus atratns, Elis 

 -subjens, Eumenes fraternus, Mo- 

 nobia quadridens, Polistes ameri- 

 ■canum, Chlorion caendeum, 

 Bembidula quadrifasciata, Bem- 

 bex texana, Xylocopa virginica, 

 Psithyrus laboriosus, Bombus 

 pennsylvanicus , Apis mellifera, 

 Dahana atripennis, Spragueia 

 ■onagrus and Heliodenes sp. (near 

 or H. bella). 



Accidental: Macrophya for- 



' ' Fig. 21. Work of the midge, Cecido- 



rnudu. myia brachyuteroides, on pine. 



Pig. 22. a, The cactus-eating weevil, Gerstaekeria hubbardi Le C, on Opuntia 

 vulgaris, enlarged, b, A pine borer, Chalcophora virginiensis Drury, nat. size. 



