120 Mr. W. Wing's Description 



peculiar to the male, while those on the wings of the right side are 

 as characteristic of the female ; the antenna on the left side is 

 broad and densely pectinated as in the male, while that on the 

 rieht is narrow and setaceous. The abdomen of the male insect 

 of this species, as is v.'ell known, is always smaller in diameter 

 than in the female, and densely tufted at the anus, and this is pre- 

 cisely the case in that half of the specimen in question which 

 exhibits the characters of the former sex. 



This specimen was taken at Witham, in Essex. 



Diaphora Mendica (PI. XIV. fig. 5). This specimen has the 

 form of the wings, body and antennae of the male, but the colour 

 and markings of the female. The male of this species, as ento- 

 mologists are aware, is dark ash colour, with black spots, while 

 the female is cream colour, with similar markings, like the spe- 

 cimen figured. 



Taken by Mr. Nicholas Cooke, near Dublin, June, 1842. 



Orgyia Antiqua (PI. XIV. fig. C) is an imperfectly developed 

 hermaphrodite, which had not fully expanded the upper wing on 

 the right side, which in this case is that of the male, as shown by 

 the large pectinated antenna and the fully developed posterior 

 wing ; the antennae on the left side being setaceous as in the 

 female, and the wings also rudimentary as in that sex. 



It was reared by the late Mr. Henry Longley, from the larva, 

 and presented since his death to the British Museum. 



Acronycta Aceris (PI. XIV. fig. 7). The left side, together with 

 the whole of the body, is distinctly of the form and colour of the 

 male of this species, while the right wings have the colour and 

 fainter markings of the female. 



It was reared from a pupa, and kindly presented to me by 

 E. Doubleday, Esq. 



Biston Prodromaria (PI. XIV. fig. 8). The wings and whole of 

 the body appears to have the characters of the male, but the 

 right antenna is that of the female; the difference of wings in the 

 sexes of this species is scarcely to be perceived. 



It was taken in Dunham Park, Cheshire, in April, 1840, by R. 

 Edleston, Esq., to whose kindness I am indebted for the oppor- 

 tunity of figuring it, and also of the following insect, and Diaphora 

 Mendica. 



