THE NEW INSECTARY. 



75 



crop of larvae, quite small the first season, would not make 

 their presence seriously felt until the following year. Of 

 course, if the beetles were extremely numerous every year, 

 their eg"g"-laying each season would insure a succession of full 

 grown injurious grubs every summer. 



The chief objection to lantern traps lies in the fact that 

 they apparently attract very many more males than females, 

 and that many of the females which are captured appear to 

 have laid their eggs. The results, therefore, of this experi- 

 ment, another season will be awaited with interest. 



The entomologist was privileged to examine one catch of 

 beetles made at the cemetery with the following results as to 

 species : Bolhocerus parchis, i ; B. lazarns, 8i ; S erica sericea, 

 4; Copris sp. (mutilated) i; Lachnostcrna tristis, i ; L. fusca 

 and L. rugosa, 75 ; total, 163. 



Robins aid in the extermination of this pest and are fre- 

 quently seen in numbers pulling the grubs from under the dead 

 patches of grass. It has been found, too, that where a copious 

 supply of water is obtainable, by keeping the dying patches 

 thoroly wet all the time, the grass can "keep ahead" of 

 the grub and be made to appear green in spite of them. Dr. 

 Smith of New Jersey, advises the use of a liberal amount of 

 ground tobacco broad-casted over the entire lawn, followed 



Fig. 60.— a lantern trap. 



