vailed throughout the entire insect, and the forms of the other were 

 perceptible in solitary parts. From this list of obser/cd Hermaphro- 

 dites, made by Ochsenheimer, it appeared that in fourteen out of the 

 twenty-three instances there cited of true Hermaphrodites, the right 

 side was male and the left female. 



Curiously enough, in the only specimen of a true Hermaphrodite 

 which he ever saw alive, and which was now in his cabinet, the right 

 side was female and the left side male, in exception to the general nde. 

 This Hermaphrodite was a specimen of Gompteryx Rhamni, and the 

 greenish white colour of the female (right) wings contrasted very 

 strongly with the bright sulphur yellow colour of the male (left) wings. 



Among the imperfect Hermaphrodites the majority, viz., six out 

 of eleven in Ochsenheimer's list, were females, and the minority male 

 with female characters. 



Scopoli seemed to have been of opinion that Hermaphrodites 

 sufficed to themselves, but subsequent writers on the subject appeared 

 to think this not to be the case. 



It appeared that many of these so-called Hermaphrodites were 

 really nothing more than monstrosities, because on anatomical in- 

 spection they were found not to possess perfect female organs in 

 conjunction with perfect male organs, which must exist to constitute 

 true natural Hermaphroditism. 



In conclusion he would allude to the third and regular method of 

 generation, which was called sexual. The methods of generation 

 previously alluded to being of course quite exceptional and abnormal. 

 As a rule all insects were of separate sexes and required the admixture 

 of both sexes in order to be fruitful. 



The union of the sexes by copulation was followed by the forma- 

 tion of the egg and the development of the embryo. 



The differences of the sexes in size, form, and colour, were very 

 striking in most species. 



First as to size and form. It might be stated as a rule that the 

 body of the female was always thicker, larger, and generally more 

 convex. On the other hand the male was generally slenderer, smaller, 

 more delicately formed, and provided with longer legs. These 

 characteristics were particularly noticeable amongst the Coleoptera. 



Another point worthy of notice was that the females of certain 



