156 BRITISH BUTTERFLIES 



The Pearl-bordered Fritillary (Argynnis Euphrosyne) 



There is very little difference in the size of this and that of the 

 last species, but Euphrosyne (Plate II, fig. 6) is generally a trifle 

 larger. The two butterflies are also very similar in appearance ; 

 indeed, they are so much alike on the upper side that it is impos- 

 sible to decide on the name of either without an examination of the 

 under surface. 



Euphrosyne has a border of seven triangular silver spots on 

 each hind wing, exactly corresponding with those of Selene. It 

 has also the large central spot of silver. But, beside these, there is 

 only one other, and that is situated in the basal angle. Thus there 



are only nine silvery or pearly 

 spots on each hind wing of 

 Euphrosyne, while there are 

 seventeen on Selene. This 

 will form a ready means of 

 distinguishing between the two 

 species. 



The seasons and localities 

 FIG. 68. THE PEARL-BORDERED n 



FRITILLARY-UNDE* SIDE. of this butterfly correspond 



very closely with those of the 



last species, but it is much more common, and may be found in 

 abundance in nearly all our southern woods during May and 

 June. 



The caterpillar, also, feeds on the same plant (dog violet) as 

 Selene. It is black, with whitish lines along the sides ; and is 

 provided with a number of bristly spines. 



The chrysalis is of a grey -brown colour, with small dots of a 

 paler tint on the wing cases ; and its body has a number of short 

 conical projections exactly corresponding with the spines of the 

 caterpillar. 



The Queen of Spain Fritillary (Argynnis Latona) 



We now pass from the commonest to the rarest and most 

 prized of our wood butterflies The Queen of Spain (Plate II, 

 fig. 7). This royal personage is not easily mistaken for any of the 

 meaner Fritillaries even when the upper surface only is examined, 

 as the concave hind margins of the fore wings serve as an almost 

 conclusive mark of distinction. The rich tawny brown of this side 



