316 
Hermaphroditism etc. in Pediculus 
Cross II. Capitis d + corporis 9- 
d $ i 
Ft 
(D) 
59 
7 
0 
F 2 
(E) 
204 
199 
0 
F s 
(F) 
112 
117 
1 
F 1 
+ f 2 + f s 
375 (53 %) 
323 (46 %) 
Ml 
%) 
Cross 
III. Capitis 
d + corporis $. 
d 
? 
i 
F 1 
(G) 
5 
15 
0 
Cross 
IV. Capitis ( 
d + corporis ?. 
d 
? 
f 
Ft 
(H) 
43 (47 %) 
43 (47 %) 
5 (6 
%) 
Cross 
V. Capitis d + corporis $. 
d 
$ 
n 
Ft 
(i) 
75 (69 %) 
26 (25 %) 
7 (6 
%) 
Cross VI. 
Capitis d + corporis 2. 
d 
$ 
n 
(J) 
128 
16 
0 
(K) 
104 
2 
20 
f 2 
(L) 
82 
17 
31—parents of (O) and ( P ) 
F 2 
(M) 
90 
28 
10—parents of ( Q) and ( R ) 
F 2 
(N) 
92 
7 
10—parents of ( S) 
f 3 
( 0) 
22 
9 
5 
f 3 
(P) 
16 
31 
15 
f 3 
(Q) 
100 
17 
13 
f 3 
(R) 
52 
8 
9 
W 
f 3 
(S) 
7 
32 
4 
The descendants of Cross VI give the following totals: 
d 
$ 
F i 
(J) 
128 
16 
0 
F 2 
{K, L, M , N) 
368 
54 
71 
f 3 
( O, P, Q, R, S) 
197 
97 
39 
Ft 
+f 2 +f s 
693 (71 %) 
167 (17 %) 
110 
Considerations regarding Bacot’s material. 
Cross I, the sole one in which the d was corporis , did not yield herma¬ 
phrodites among the 429 descendants. These, however, possess a character 
in common with the lots that comprise hermaphrodites in exhibiting a 
numerical preponderance of dd (56 per cent.). The strikingly large proportion 
of dd in subsequent crosses (v. infra) was already observed by Bacot. 
