Table lla.--Prediction of hatching of Melanoplus femurrubrum as to dates when 
O to 100 percent will have hatched 
{| Current } 
i Average average | Effect of 
maximum } maximum Devia- | 1-degree 
5-day ; temperature } temperature deviation j{ Sum of | Hatching 
interval } E a(t-t) datesL/ 
en ee Days 
March 2-6--- 26.8 
tenes 316 
ce ae 42.4 
17-21--- 48.2 
22-26----1 52:0 
TSN 5337, 
April aca yew 
6-10---- 5256 
11-15---- 5620 
16-20---- 6D 
21-25---- 62 .6 
26-30---- 68.9 
May 1-5---- 65.2 
6-10---- 61.7 
11-15----| 66.2 
16-20---- 73.6 
21-25---- VPAAd 
26-30---- 66.7 
31-4---- 732 } 
June 5-9---- 76.0 
10-14---- Tlic) 
15-19---- 12 
20-24---- sed) 
1/ Results of column 6, sum of a(t-t), added to or subtracted from 
dates in table 11b when O to 100 percent will have hatched. 
Table 11b.--Average and predicted hatching dates for Melanoplus femurrubrum 
when 0 to 100 percent will have hatched 
Predicted date 
- 20 - 
