The Bulletin 
23 
Egg Number 
Total Length, Measured 
as a Straight Line 
Greatest Diameter 
30 
2.15 mm. 
.90 mm. 
31 
2.54 mm. 
• .96 mm. 
32 
2.10 mm. 
.93 mm. 
33 
2.21 mm. 
.91 mm. 
34 
2.12 mm. 
.91 mm. 
35 
2.19 mm. 
.89 mm. 
36 
2.12 mm. 
.91 mm. 
37 
2.05 mm. 
.93 mm. 
38 
2 .21 mm. 
.92 mm. 
39 
2.28 mm. 
.88 mm. 
40 
2.10 mm. 
.88 mm. 
41 
2.19 mm. 
.91 mm. 
42 
2.31 mm. 
.91 mm. 
43 
2.57 mm. 
.93 mm. 
44 
2.29 mm. 
.85 mm. 
45 
2.27 mm. 
.95 mm. 
46 
2.41 mm. 
.91 mm. 
47 
2.18 mm. 
.89 mm. 
48 
2.29 mm. 
.87 mm. 
49 
2.54 mm. 
.93 mm. 
50 
2.39 mm. 
1.04 mm. 
51 
2.42 mm. 
.93 mm. 
THE EGG. TIME OF HATCHING 
During the egg-laying period records have been kept of a total of 143 
separate lots of eggs containing a total of 903 eggs. These eggs were 
hatched under varying conditions both as to temperature and moisture. 
Some of the eggs were hatched in pieces of cornstalks placed in vials 
or in tin boxes, and in some cases where there were large numbers of 
eggs they were placed in tin boxes together with the piece of corn on 
which they were laid. In some cases the records were secured to 
within four hours, in other cases to within not more than twenty-four 
hours. 
These tables w r ill show that there is great variation in the time of 
hatching of the eggs of the Southern Corn Bill Bug, and while the 
writer believes that this variation can be controlled to a very great 
extent by giving identical conditions, he also believes that no such 
uniform conditions exist in nature. Therefore, it seems perfectly safe 
to conclude that the eggs of the Southern Corn Bill Bug hatch in not 
less than 77 hours and that the time may be greatly extended certainly 
to 305 hours (Fig. 18), the mean time being 132 hours. 
The figures in some of the tables are very accurate. This is espe¬ 
cially true of the figures in Table II, wdiere some of the figures are to 
within less than four hours. 
In securing the figures for Tables III and IY the usual practice was 
to give the adults fresh food about 6 o’clock in the evening and then to 
remove this food about 8 o’clock in the morning. In most of the cases 
the eggs were examined about 8 o’clock in the morning, at noon, and 
