448 THE ENTOMOLOGIST. 



wings being precisely similar to those of the female, and the 

 fourth, which is the left fore wing, that of the male. Does 

 this often occur? — M. N. Inman ; 10, Upper Hamilton 

 Terrace^ N. W\ 



The wings are of a bright sienna-brown ; the fore wings 

 have the costal margin edged with black, and the usual four 

 long transverse black spots, known as the date mark, under 

 the base of the subcostal ray on the upper side; a waved and 

 irregular narrow black band crosses the middle of the wing, 

 and between this and the hind margin are two oblique black 

 bars, the inner of which is slightly interrupted, the outer 

 entire ; the inner takes the place of the transverse series 

 of round black spots, usual on this part of the wing; the 

 outer black bar represents the usual scalloped black bar 

 exterior to the series of black spots, to which I have just 

 alluded; still exterior to this is a double black line parallel 

 to, and almost adjoining, the hind margin ; the hind wings 

 have a ^ew of the usual black markings near the base, and 

 extending towards the middle of the wing, and exterior to 

 these is a transverse series of three black spots, the first 

 oblong, the others nearly circular; parallel to the hind 

 margin is a continuous black bar, and exterior to this a 

 double black line parallel to, and almost adjoining, the hind 

 margin. On the under side the fore wings present no very 

 remarkable character: the silver spots on the disk of the 

 hind wing correspond in number with those of the normal 

 insect, but it will be seen, by a reference to the lower figure, 

 that they differ in form ; the most remarkable deviation from 

 normal character is that the usual series of seven semicircular 

 silver spots parallel to the hind margin is entirely absent, 

 and its place supplied by a continuous silver bar parallel to 

 the margin. It need scarcely be observed that the term 

 parallel is not strictly applicable, as the markings thus deno- 

 minated ought to be straight, whereas, in this instance, they 

 follow the curved outline of the wing. In reply to Mr. 

 Inman's query as to the monstrosity in the specimen of 

 Colias Edusa, 1 may reply, without hesitation, that such 

 monstrosities rarely occur ; nevertheless, 1 have known 

 instances, more especially in Mr. Bond's rich collection, 

 of specimens which have one wing only male, and others 

 with one wing only female. 



