10 COMMON WHITE GRUBS. 
Unhke the grubs, the different species when in the beetle stage 
have as a rule different food preferences. Certain species feed almost 
exclusively on the oak, others prefer the ash, some feed indiscrimi- 
nately, etc. The trees which the beetles ordinarily frequent at La 
Fayette, Ind., are the ash, oak, poplar, elm, willcw, locust, soft maple, 
and hackberry. In certain localities the pine seems to be the 
preferred food. Mr. H. P. Loding reports that in the vicinity of 
Fic, 7.—Eggs of white grubs in their natural cells: a. Immediately after deposition ; 
b, six or seven days later; c, white grubs hatching. (Original.) 
Mobile, Ala., he has collected ZL. prununculina Burm. and L. micans 
KXnoch feeding on the longleaf pine, which indeed appears to be their 
favorite and in some cases possibly their sole food. 
In the latitude of Indiana the beetles make their first appearance 
the last of April or first of May and continue to be present until the 
first or middle of July, the period of greatest abundance being be- 
tween the middle and last of May. They swarm to the trees at dusk 
543 
