WHITE BUTTERFLIES 149 



no harm is done by a practice which is 

 otherwise convenient. 



The Large White (Pieris brassicse), Plate 

 XIV., Fig. 1, cannot be confused with any 

 other British butterfly. The figure shows 

 the female ; the male wants the two black 

 spots and dash on the forewings. It is 

 usually spoken of as a common insect, but 

 in many districts, especially in the North, it 

 is only occasionally met. A more common 

 species is the Small White (Pieris rapse), 

 Plate XIV., Fig. 2, which a beginner readily 

 confuses with the Green-veined White (Pieris 

 napi), Plate XIV, Fig. 3. The two butter- 

 flies are not unlike on the upper side, but 

 the veins on the under side of the hind- 

 wings of the latter are marked by a broad 

 blackish-green edging. The females of each 

 may be known from their having two black 

 spots on each forewing, as well as one spot 

 on each hindwing. The Green -veined 

 White has the power of secreting a scent of 

 considerable power, probably used as an 

 attraction to the opposite sex. The delicate 

 and lovely Orange-tip (JEuchloe cardamines), 

 Plate XIV., Fig. 4, is found in early Summer 



