144 ENTOMOLOGY 
crustaceans, 2 spiders, 2 Orthoptera, 8 Diptera, 9 Coleoptera, 
51 Hymenoptera and 255 Lepidoptera. The large proportion 
of Lepidoptera is due in great measure 
to the fact that they are collected 
oftener than other insects (excepting 
Pigs 184. 
possibly Coleoptera) and that sexual 
dimorphism is so prevalent in the 
order that hermaphrodites are easily 
recognized. 
The most common kind of her- 
maphroditism is that in which one 
side is male and the other female, as in 
Fig. 185. Bertkau found this right- 
and-left hermaphroditism in 153 1n- 
dividuals. In other instances the 
antero-posterior kind may occur, as 
Ovum of a butterfly, Va- . ; —— 
nessa, in its follicle. e, fol. when the fore wings are of one sex 
hele coinebtm, gi germinel oad the hind» wines Gt the -other= 
vesicle; m, branching nucleus 5 : 
of nutritive cell; 0, ovum—. rarely, the characters of the two sexes 
After Woopwortu. ‘e ‘ 
are intermingled. 
Hermaphroditic insects are such rarities that very few of 
them have been sacrificed to the dissecting needle in order to 
determine whether the 
Fic. 185. 
phenomenon involves the 
primary organs as well as 
the secondary sexual char- 
acters. Where dissections 
have been made. it has 
been found usually that 
hermaphroditism does ex- 
tend to the reproductive 
organs themselves. Thus 
a butterfly with male 
Hermaphrodite gypsy moth, Porthetria dis- 
par; right side, male; left, female. Natural 
wings on the right side size.—After TASCHENBERG, from  Hertwig’s 
: : Lehrbuch. 
and female wings on the 
left would have a testis on the right side of the abdomen and an 
ovary on the left side. 
