H. E. Crampton 119 
TABLE II. 
Pupal Period. Selection in Type. Males. 
Character 
Mean; Survivors 
Mean ; Dead 
(0 
Error of 
Difference 
Proportion 
of 
5 : 6 
Selection 
Bust, Length 
„ Width 
„ Depth 
„ Frontal Pi'dportions 
„ Sagittal Proportions 
18-2313 ±-0453 
10-9014 + -0322 
12-0471 + -0304 
59-6865 + -1.339 
65-9029 ±-1206 
18-0924 ±-0440 
11 -1962 + -0320 
11 -9577 + -0322 
6 1-9923 ±-1294 
66-2230 ±-1243 

+ 0-1889 
-0-2948 
+ 0-0894 
- 2-3058 
-0-3201 
0-0631 
0-0453 
0-0441 
0-1850 
0-1731 
> 2f 
> 6e 
> 2f 
> 12e 
> le 
Probable j''^^")"^* 
/certain 
Certain 
Probable 
Certain 
Possible 
Left Antenna, Length ... 
Width ... 
„ „ Proportions 
11 -,3514 + -0273 
4-6844+ -0140 
41-4105 + -1190 
11-1870 + -0367 
4-4784+ -0156 
40-1154 + -1211 
+ 0-1644 
+ 0-2060 
+ 1-2951 
0-0457 
0-0209 
0-1696 
> 3e 
> 9f 
> 7e 
Cei-tain 
Certain 
Certain 
TABLE III 
Pupal Period. Selection in Variability. Males. 
Character 
Standard 
Deviation ; 
Survivors 
Standard 
Deviation ; 
Dead 
(5) 
Difference 
(^) 
Error of 
Difference 
Proportion 
of 
5 : 6 
Selection 
Bust, Length 
„ Width 
„ Depth 
„ Frontal Proportions 
„ Sagittal ,, 
0-7780 + -0320 
0-5535 + -0228 
0-5227 + -0215 
2-2631 + -0932 
2-0701 ± -0852 
0-7441 + -0311 
0-5424+ -0226 
0-5450 + -0227 
2-1882 + -0915 
2-1016 ±-0879 
+ 0-0339 
+0-0111 
- 0-0223 
+0-0749 
-0-0315 
0-0446 
0-0321 
0-0312 
0-1306 
0-1224 
< f 
< f 
< e 
< ( 
None 
None 
None 
None 
None 
Left Antenna, Length . . . 
Width ... 
„ „ Proportions 
0-4686 + -0193 
0-2412+ -0099 
2-0423 + -0841 
0-6218 + -0260 
0-2645 + -0110 
2-0470+ -0856 
-0-1532 
- 0-0233 
- 0-0047 
0-0323 
0-0147 
0-1200 
> 4e 
> u 
< f 
Certain 
Possible 
None 
with a high degree of probability. Naturally it follows from the foregoing that 
the survivors are much more slender in frontal proportions, and the difference 
between the two groups in this regard exceeds twelve times the error of the 
difference. In sagittal proportions, however, the narrower survivors are only 
probably different from the others. 
Remarkably clear results follow from the comparison of the antennal characters. 
These organs are not only much longer in the survivors, and wider, but they are 
also stouter than those of the incapacitated pupae ; and in all three characters 
the difference indicates selection with certainty. 
