58 THE ENTOMOLOGIST. 
tozoa passed through the micropyle, the nucleus of one of 
which conjugated as usual with the egg nucleus, but the nucleus 
of the other, instead of degenerating, gave rise to nuclei deter- 
mining the right side of the body, which would thus be pure 
subsignaria and differ from the hybrid left side which resulted 
from the conjugation of nuclei derived from two different species. 
(r) Inheritance of Secondary Sexual Characters.—In these 
experiments I have used species, one of which carries very marked 
secondary sexual characters, whilst in the other these characters 
are almost absent; the primary cross was between the female 
of the male which possessed these characters, and the male used 
was without them. What was the result? We might expect 
that each sex carried its own peculiar characters, and that there- 
fore the hybrid males would not show any. The reverse is the 
case, however; the male secondary characters are passed on by 
the female and correctly appear in the male of the primary cross. 
Not only is this so, but, where the hybrid female was crossed 
back on the male which was devoid of them, they nevertheless 
appear in some of the secondary forms, thus demonstrating that 
the hybrid female also carried latent the secondary characters of 
a male which had never appeared either in the production of the 
primary or of the secondary hybrid. It is thus evident that 
both sexes may carry and transmit the characters of the opposite 
sex, aS was most beautifully proved in my experiments with the 
winged and the wingless forms of the Biston group. 
EXPLANATION OF PLATES. 
PLATE I. 
I. Ennomos quercinaria. A. Male genitalia. B. Penis. c. Female 
genitalia showing bursa copulatrix, ductus burse, and signum. II. 
Similar structures in H. subsignaria. III. The same structures of 
hybrid EH. winnt. 
PuateE II. 
IV. Genitalia of gynandromorphic hybrid winnt. V. Typical female 
genitalia of the same hybrid. VI and VII. Furee (most inter- 
mediate forms) of the secondary hybrids—VI of oberthuri, VII 
goodwint. VIII. Penis and furea of asymmetric form. IX, X, XI. 
Wing outline—IX of male quercinaria, X of male subsignaria, 
XI of male hybrid winnt. 
BRITISH ORTHOPTERA IN 1918. 
By Wew.uuuess, B.A., BF .RGs: 
In 1915 but few facts connected with our Orthoptera have 
come to hand, which seem to be worthy of record. Of these, 
however, one—the capture of one of our scarce earwigs—is of 
considerable importance. 
