74 WHITE GRUBS IN LAWN. 



quently submerged with good results. Of course, fleas will 

 return to a cat or dog when sufficient time has elapsed after 

 treatment as above. We must remember that neglected bed- 

 ding is the chief source of trouble. 



Other species of fleas are found on human beings, on rab- 

 bits, moles, pocket gophers, squirrels, rats, mice, fowls, etc. 



AN EXPERIMENT WITH LANTERN TRAPS FOR 

 WHITE GRUBS IN LAWN. 



Although lantern traps, as a rule, are not regarded as 

 practical, and certainly are of not the slightest advantage in 

 the orchard, we suggested its use, among other things, last 

 spring to the superintendent of a large cemetery near Minne- 

 apolis, where the white grub (larva of L. rugosa, in part), had 

 been destroying the lawn over a large area. He was at the 

 same time advised of the regard, or lack of regard, in which 

 the lantern trap was held, and warned of possible failure. As 

 a matter of fact, in the case of the May beetle, for parties who 

 can go to the expense of a large number of such traps, and 

 where the injury caused by the grubs is sufficiently great to 

 induce one to leave no stone unturned in an effort to lessen 

 their havoc, the lantern trap may be of some benefit, and it 

 was upon this basis that the traps were used in this instance. 

 The entomologist hardly cares to report on the results of the 

 work until the experiment has been given another season's 

 trial. We might say, however, briefly, that the traps (three 

 doz. in number), were set out in different parts of the ceme- 

 tery on May 8th, and were in use every night for about six 

 weeks. The superintendent writes me under date of Decem- 

 ber 4th, that they caught in round numbers about 3,000 

 beetles, not all L. fusca, or L. rugosa, however. He states 

 that the injury to the grass this season was not as great 'as 

 the previous year, which condition may have been due in part 

 to the presence of the traps. It is to be noted, however, that 

 since these larvae live for two years before turning into beetles, 

 marked injury to the grass, due to the ravages of large num- 

 bers of nearly and quite full grown grubs one season, would 

 naturally be followed by a period of exemption from injury 

 the following season, at which time there might be a compar- 

 atively small number of the full grown larvae, while the new 



