-hl+O- 
Table 4. releases of Lydella stabulans var. grisescer.s R. P. in I^ 7 -, ' 
p* J- ±. 
: Parasites 
: Period of 
release 
State 
\ Township 
| County 
/ Y\ 
: liberated 
: (Dates inclusive 
• Number 
Ohio 
: Moorefield 
: Clark 
• 1,991 
! July 19 
: Liberty 
: Delaware 
: 1,996 
: July 9 
: Pike 
: Knox 
: 1,995 
' Do. 
• Avor. 
• Lorain 
: 1,596 
: July 19 
: Pike 
: Madison 
s 2,996 
: July 10 
: Stokes 
: Madison 
: 2,993 
: Do. 
: Jefferson 
: Mercer 
l 1,983 
: July 12 
: Newberry 
: Miami 
: 1,992 : 
• Do. 
: West-field 
: Morrow 
■ 1,997 
: July 9 
: Js lu>on 
: Shelley 
: 1,992 • 
: July 12 
: Marl ;- oro 
: Stack 
1*976 
: July 6 
Canaan 
Wayne 
! 1,991 
: Do. 
Total- 
— 
' 
25,39S 
: July 6 - 
19 
Vermont ■ 
Grand Isle - 
Grand Isle : 
3,960 
July 17 
Pouu tney 
Rutland 
l,96l 
: June 19 
Middlesex : 
Washington : 
1,953 
Do. 
Bridgwater : 
Windsor ! 
1,0-59 ; 
Do. 
Total-: 
— : 
j 
9.813 : 
June 19 - 
July 17 
Virginia : 
Lee : 
Ac comae : 
1>977 : 
June 15 
Franktown : 
Northampton : 
1*979 ' 
Do. 
Total- l 
• - 
• ... 
*,9^ 
Do. 
Grand total—; 
: 
s 
92,922 : 
June 15 - 
July 19 
This tachinld normally has a pre oviposit ion period of from 10 to 
lk days. r ']ie fourth instar it the optimum stage of the host ior success- 
ful oviposition by this species, therefore, it is desirable that re- 
leases be made from 10 days to 2 weeks before borers in Hie field start 
to enter this instar. Fov the two-generation area this period was con- 
sideicd to be the week of June 20-26 and for the one-generation area the 
week of Jul' 7 12-1<v, These periods vrere calculated from data on average 
seaexns ir Key/ 11 land .<~i: Ohio* The extent of synchronization of para- 
sites with thoir preferred hoots and the extent to which the 1935 -<- sor i 
approached the average is presented in charts 5 '° 9i inclusive. 7 se 
charts she. that releases in practically all cases were nearly ideal. 
The j,?60 adults released at Grand Isle, Vt» , (Chart 7), would probably 
synchronize very well with the single-generation larvae that normally 
occur there. 
3. Cremastu s f la.voorbitalis (Cameron) (Ichneumonidae): 
Five colonies of this parasite were released in the more southern 
parts of the two- -generation area, including one at each of the test points 
in Connecticut, New Jersey, and Virginia. Table 5 summarizes the releases 
