eos Ol ee 
\ 
proximately equal value in incre 
ate fe ents apache Coated ides 
ing the adhesiveness of led arsen- 
‘ arsenate, elthough somewhat more 
ad ve japon alone, was inferior to 
Biter sf the dhoreenintionda stic! kers when they were used with lead 
arsenate at comparable dosages. 
> i 
Introduced parasites.~-dJ. W. Balock, Moorsstuwm, reports that 
20,000 cocoons of the grub parasite gts vernelis Rohwer, received 
gon Japan in September and kept at normal ternerature in the warn 
cellar, were transferred on November 6 to the refrigeration cellar 
for overwintering. The cocoons were examined and Reet ocochs 
tctaling 1,417 were removed. The sweber of funsused cucouns dis~ 
carded at the tine the shirment was received was 4,448. This brings 
the total nunber of ceccune ivst through fuagus to 6,865, or about 
20 percent. 
Influence of ants on Jap beetle wrub po wlotion.-—-acscordiug to 
R. fT. White, Moorestown, five cua samvles fron field colonies of 
ants belonging to the genera eee Lasius, ana hiyrmica were 
placed in glass cages in the labcratory. The queens, and sonetines 
numbers of males, were placed in the cages with the workers. The 
ants seemed entirely wnaware of their cavtivity end could be ob- 
Served readily at all times. Grubs of P. jn .oica were placed in 
the cages several duys before tne ants were added to allow them to 
become oriented and thus net excite tne ants in their new quarters. 
Cages were left wmdisturbedc fcr a period «f 34 days and then ex- 
amined for living grubs. In all cases the grub mortality was ex- 
actly the same in the check cage containing only grubs as it was in 
the corresponuing cage containing both ants and grubs. In all cages 
the ant runways and paileries spread throughout tae soil and, al» 
though in some cases living grubs were within helf an inch of per- 
fManent galleries, the ants showed no tendency tu molest the gru 
Data from these tests indicate that the species of ants used do not 
destroy or even nolest living grubs in the soil. livre experiments, 
With other species of ants, are now under way at the laboratory. 
Energency 1 relief labor.--~Labor to the extent of 123 man-deys 
has been furnished by the local relief administrator for grub-survey 
work at Moorestown, N. J 
Vv 
Ce) ari 4 West bbury , N. as 
Host—slant preferences of asiatic garden beetle.--H. 0. Hallock 
reports that, in « study of the selection by adults of Autoserica 
castanea Arrow of plants on which to feed and to oviposit, a 
screened cage 24 feet long and 4 feet wide was ovilt om the lavora-- 
tory grouncs et Westbury, N. Y. he cage.wes divided intu LE -con- 
partnents, each 4 feet by 18 inches, and in eacn compartnent was a 
different variety of plant. The compartments wore separated py 
Strips of metal extending from the surface of the zround to a depth 
