154 
Variation and Inheritance in Aphis 
TABLE XX. 
Pairs of Brethren. 
Ratio, 3rd generation (60 families, 368 individuals). 
The 2nd Individual taken. 
o: 
00 
>~i 
1 
o 
00 
19-0-19-9 
o 
®i 
1 
e-i 
03 
1 
'-1 
C5 
: 
®< 
1 
©) 
•t 
J? 
Si 
1 
03 
1 
to 
1 
Oi 
00 
00 
Number of 
individuals 
involved 
18-0— 18-9 
2 
1 
3 
19-0— 19-9 
4 
19 
18 
7 
6 
5 
1 
2 
62 
20-0— 20-9 
2 
19 
30 
32 
10 
1 
5 
99 
21-0— 21-9 
1 
18 
32 
62 
71 
30 
21 
5 
3 
243 
22-0— 22-9 
7 
10 
71 
122 
83 
41 
14 
16 
0 
4 
368 
23-0— 23-9 
6 
1 
30 
83 
136 
91 
57 
27 
1 
432 
24-0— 24-9 
5 
5 
21 
41 
91 
130 
94 
39 
10 
12 
448 
25-0— 25-9 
1 
0 
5 
14 
57 
94 
118 
41 
7 
4 
341 
26-0— 20-9 
2 
0 
3 
16 
27 
39 
41 
18 
2 
16 
164 
27-0— 27-9 
1 
10 
7 
2 
20 
28-0— 28-9 
4 
0 
12 
4 
16 
0 
12 
48 
Totals 
3 
62 
99 
243 
368 
432 
448 
341 
164 
20 
48 
2228 
TABLE XXL 
Pairs of Grandchildren. 
Ratio, 3rd generation (30 sets of families, 291 individuals). 
The 2nd Individual taken. 
C3 
00 
»-H 
1 
Ci 
00 
Ol 
63 
'-I 
1 
0 
63 
03 
1 
0 
93 
C3 
03 
1 
C5 
1 
•<^ 
0( 
C3 
1 
03 
1 
to 
©i 
Number of 
individuals 
involved 
18-0— 18-9 
1 
3 
6 
0 
0 
1 
11 
19-0— 19-9 
1 
26 
37 
42 
14 
11 
1 
132 
20-0— 20-9 
37 
88 
94 
89 
59 
37 
6 
2 
412 
21-0 -21-9 
3 
42 
94 
148 
155 
134 
65 
34 
2 
677 
22-0— 22-9 
6 
14 
89 
155 
202 
202 
129 
45 
7 
849 
23-0— 23-9 
11 
59 
134 
202 
266 
154 
53 
4 
883 
24-0—24-9 
1 
37 
65 
129 
154 
100 
56 
12 
554 
25-0— 25-9 
1 
0 
6 
34 
45 
53 
56 
34 
7 
236 
26-0— 26-9 
2 
2 
7 
4 
12 
7 

34 
Totals 
11 
132 
412 
677 
849 
883 
554 
236 
34 
3788 
m 
+j 
a 
o 
u 
o 
u 
'a 
a 
