J. A. Harris 
455 
TABLE IV. 
Wing Length in Families of Drosophila. 
Family 
57 
59 
61 
63 
65 
67 
69 
71 
73 
Totals 
2(0 
2 (l 1 *) 
31 
1 
— 
1 
2 
8 
12 
6 
1 
— 
31 
2053 
136183 
32 
1 
9 
12 
830 
57420 
37 
1 
1 
3 
5 
15 
9 
4 
4 
42 
2832 
191426 
39 
1 
2 
5 
10 
12 
12 
7 
1 
50 
3348 
224634 
57 
4 
6 
18 
9 
37 
2469 
104877 
58 
1 
16 
16 
11 
4 
48 
3218 
215928 
523 
1 
3 
7 
15 
19 
8 
1 
54 ' 
3662 
248654 
575 
3 
5 
4 
3 
3 
18 
1166 
75658 
570 
6 
12 
16 
7 
8 
5 
54 
3538 
232270 
582 
2 
10 
12 
21 
6 
2 
53 
3495 
230749 
587 
o 
12 
4 
18 
1246 
86274 
588 
4 
17 
20 
12 
53 
3525 
234613 
1177 
2 
1 
5 
7 
14 
14 
3 
46 
2974 
192646 
1193 
2 
12 
18 
16 
5 
513 
3465 
226749 
1226 
4 
18 
21 
8 
1 
52 
3348 
215724 
Totals 
4 
3 
26 
86 
154 
180 
125 
37 
6 
621 
41169 
2733805 
TABLE V. 
Sororal Correlation for Wing Length, in the Vinegar Fly. 
Wing of Second Sister. 
bo 
a 
57 
59 
61 
63 
65 
67 
69 
71 
73 
Totals 
2 (V) 
57 
3 
11 
19 
41 
55 
21 
5 
1 
161 
10605 
59 
3 
7 
15 
29 
41 
24 
11 
5 
135 
8977 
61 
11 
7 
74 
253 
357 
278 
147 
57 
•> 
1187 
77733 
63 
19 
15 
253 
780 
1234 
1085 
521 
157 
20 
4084 
268002 
65 
41 
29 
357 
1234 
2042 
2128 
1145 
322 
\>- 
7335 
483441 
67 
55 
41 
278 
1085 
2128 
2558 
1568 
427 
87 
8227 
545433 
69 
21 
24 
147 
521 
1145 
1568 
1212 
440 
67 
5145 
343643 
71 
5 
11 
57 
157 
322 
427 
440 
158 
31 
1608 
107682 
4 
5 
3 
20 
37 
87 
67 
31 
12 
266 
17900 
Totals 
161 
135 
1187 
4084 
7335 
8227 
5145 
1608 
266 
28148 
1803110 
Whence, writing the formula for r without reduction, 
= N -1)1 V » -U] 
hh 8 [(n - 1) S (T 2 )] fS.j {n - 1) S .(Q]y 
S[n(n-1)] \ S[n(n-l)] ) 
agreeing exactly with the value deduced from the table. 
58—2 
