12. 
. White grub working in a potato tuber, Tabor, 8. Dak., 1912 
. Typical examples of May beetles: Lachnosterna crenulata and Lachno- 
JA’ dorset injured by white grubs, Galena, Il., 1912 
ILLUSTRATIONS. 
SCPE J USCH Nc Je ot eee em ls ack. s Ca oe Cee ORE EES = ye eee 
. Map showing the invasion of white grubs in 1912..............2220.... 
. A 60-acre cornfield completely destroyed by white grubs, Farmersburg, 
ee i ee a ee 
AN NS showing characteristic injury by white grubs, Lynxville, 
Wass LOWS hos Sas ae eee i Se gee oh ee oe 
ee ee ee 
. Eggs of white grubs in their natural cells: Treaty after deposi- 
tion; six or seven days later; white grubs hatching 
. A piece of sod overturned to show the white grubs underneath, Lan- 
caster, Wis., 1912 
. Timothy field after harvest, showing sod overturned by crows in their 
search for white grubs, Galena, Ill., 1912 
. Pyrgota undata, a fly parasite of May beetles......¢.......2.-.202-226.- 
da. 
Cocoons of wasps that prey on white grubs: Elis sexcincta and Tiphia 
CROOT UME oo) Pics «8 <1 Sic eS a Ne rn 
Pasture sod overturned by swine in their search for white grubs, Lan- 
caster, Wis., 1911 
Se ee ee ec) 
545 
4 
15 
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