| 5 
Results of insecticidal applications to destroy larvae of 
the Javanese beetle in the turf, Swarthmore, Pa., 1931-33 (Con.) 




Dosage per .- Average number of larvae 
/ 1,000 Date of _per square foot found in 
“Material square application October June October May 
feet Ped. oc LOBe 1952, 1953 
Lead arsenate 5 lbs. July 1931 
Tankage A At PR October 1931 -- --- O.1- Q.00 
Sand Ary May 1932 
Lead arsenate ‘Adina’ SEs LBL Tel datlosm 40.2, ose 
Water LO. gels. 
Lead arsenate o Lbs... duly 1951 -- 4.0 e195) Ase 
Water 10 gals. October 1931 
Lead arsenate m tbe. awuly Loa) 
Water 10. gals. October 19351 -°-- -- QO.15 0.00 
May 1932 



Hibernation of Tiphia sp. #6-b.--The hibernation habits of this 
Species of Tiphia are quite dirferent from those of any other species 
so. far encountered, according to L. B. Parker and R. W. Burrell. Ob- 
Servations so far indicate that the females emerge in the fall and 
mate, after which they enter hibernation. A number of these hiber- 
nating females are being: held under varied conditions at this time. 
A few were recently. removed from hibernation and tested for oviposi- 
tion.iate in Novenbers. only one’ female deposited eggs at intervals 
until December 22. Apparently. the hibernation period must be longer 
bkefcre successful propagation of this species can be undertaken. 

’ 
i 
TRUOK CROP AND GARDEN INSECTS 
Difficulties; in wireworm work greatly reduced by morphological 
data on lervae.--ll. C. Lane and H. B. Lanche ster, of the Walla Walla, 
Wash., laboratory, report.good progress on a morphological study of 
the various species of wireworms occurring in that territory. The 
difficulty in work with wireworms in the past has been greatly in- 
creased Decause it has not been ea eae to. determine the larvae ac- 
curetely; thus it has not been ssossible to determine definitely which 
Species was under observation at the ae The long life cycle of 
these insects, together with the difficulties encountered in rearing 
field-collected larvae, make it impractical to wait for the develop- 
ment of adults before the determination of svecies. Preliminary 
studies and drawings of 12 species of the larvae of wireworms oc- 

