BROOD A OF THE MAY BEETLES EXTENDS ITS 
RANGE IN IOWA 
H. E. JAQUES 
Among the well known insect pests with which the farmer 
must contend are the May beetles which in the larva stage, ^s 
white grubs, do heavy damage to the grasses, corn, potatoes, 
strawberries and garden crops. There are about one hundred 
species of May beetles known to occur in the United States all 
of which belong to the genus Phyllophaga. Forbes* in examin- 
ing 114,493 May beetles in Illinois found 34 species, but less 
than half of these were sufficiently abundant to be of serious 
economic importance. 
The more destructive species of May beetles have a three year 
life cycle, with the grubs doing serious damage during but one 
summer of the three. In any locality all stages may be found, 
indicating the presence of three broods which have been named 
broods A, B and C. Brood A, which appeared as adults in 1920 
and as destructive grubs in 1921 is the largest of the three broods 
1^77?. O' CS 4? 
