Insects Visiting Blossoms of Spirea 141 
Curves SHow1ne THE SEASONAL DISTRIBUTION OF CERTAIN 
Insects TypicaL or THosr VISITING THE BLOssoMs 
or WILD SPIR@A. 
July Sata [Baty Tot Suly29| Aug. |Aug | Aug. 
[Pets By (5-21 2e-29 lug ¥ a q / Sl 
A — Leptura prozima E—Allantus dubius 
B— Typocerus velutinus F—Allantus basilaris 
C — Leptura canadensis G— Vespula (Vespa) diabolica 
D — Leptura cordifera H — Bremus (Bombus) terricola 
S—Blossoms of Spirwa latifolia. 
