Contents of Bulletin No. ii6. 



Introduction: Subject a difificult and complicated one 447 



The economic species 448 



Ivife histories of the injurious species 449 



Lachnosterna at lig'hts and on trees in comparison 451 



Variation of numbers in different localities and years 452 



Food and feeding habits of the species 454 



Results of feeding experiments with May-beetles {^Lach- 

 nosterna) 455 



( omparative collections of Lachnosterna from food plants, 



Urbana, 1906 456 



Movements of migration and dispersal 457 



Habits of reproduction 462 



Captures of Lachnosterna at light-traps, open fields, 



Urbana, 1906 463 



Collections of Lachnosterna from trees, Urbana, 1906 464 



Extract from breeding-cage report 465 



Relations to weather 466 



Modes and places of hibernation 467" 



Principal enemies 468 



Swine 468 



Crows and blackbirds 468 



The common grub wasp ( Tiphia) 469 



Miscellaneous insect enemies 472 



Relation to soil and subsoil 476 



Relations to agricultural management 477 



Injuries to crops 477 



Prevention and remedy 478 



