The Bulletin 
29 
Lot No. 
No. of Eggs 
Number of Hours Required for Hatching 
Minimum 
Maximum 
Average 
43 
6 
102 
114 
108 
44 
6 
126 
138 
132 
45 
3 
102 . 
114 
108 
46 
4 
126 
138 
132 
47 
2 
102 
114 
108 
48 
8 
126 
138 
132 
49 
1 
102 
114 
108 
50 
11 
126 
138 
132 
51 
12 
126 
138 
132 
52 
10 
126 
138 
132 
53 
5 
126 
138 
132 
54 
5 
150 
162 
156 
55 
8 
150 
162 
156 
56 
5 
126 
138 
132 
57 
4 
150 
162 
156 
58 
7 
150 
162 
156 
59 
8 
102 
114 
108 
60 
3 
126 
138 
132 
61 
7 
102 
114 
108 
62 
4 
126 
138 
132 
63 
6 
126 
138 
132 
64 
3 
150 
162 
156 
65 
2 
126 
138 
132 
WHERE LAID 
Practically all of the eggs laid in the field are placed in the base of 
the cornstalk helow the surface of the ground, or within an inch above 
the surface of the ground. In the cyperus plant the female seems to 
have a tendency to lay the eggs higher up. In young corn the eggs are 
usually laid deep in the heart of the stalk in especially prepared cavi¬ 
ties (Pig. 8), but in older stalks the eggs are more frequently laid in 
the sheath of the outer blade, in a little pocket (Fig. 16). 
Frequently in the field the eggs are loosely placed below the surface 
of the ground among the roots. In all cases where females had been 
watched closely they seemed to have a tendency to lay the last egg 
carelessly. In several cases where females had been observed to de¬ 
posit one egg with the greatest care, the second egg was deposited in 
only a very shallow cavity or loosely among the roots. These females 
gave every evidence of being tired of the process of oviposition, and 
seemed to abandon all their usual precautions in egg laying. 
Frequently, also, in our breeding cages loose eggs would he deposited. 
This tendency seemed to be greater when a layer of sand was placed in 
the breeding cages. So far as observed, these eggs seemed to be as 
fertile as eggs more carefully deposited. In no case where the female 
