392 INSECTS AT HOME. 



dark spot on the costal edge of the lower wings. The females 

 are at once distinguished by having two black spots on the disc 

 of the upper wings. The caterpillar is a pretty green larva, 

 and is a very indiscriminate feeder. I have bred a long series 

 of them from mignonette growing in a window-box. The 

 Butterfly appears in the midst of summer. 



The GrREEN-VEiNED White {Pieris Napi) may be known by 

 the peculiarity from which it takes its name. When inspected 

 from below, the under surface of the lower wings is seen to be 

 dull yellow, the nervures being edged with a greyish tint, which 

 has the effect of green when contrasted with the yellow. The 

 upper wings have much the same colouring, but not so strongly 

 marked, except at the tips. It is a variable insect, and the 

 varieties have been considered by some authors as being three 

 distinct species, one of which they call by the specific name 

 of Napi, another by that of Napece, and a third was called 

 Sabclliccv. Indeed, I find, on referring to my old cabinet, 

 which I arranged according to Stephens's system, these varieties 

 under their different names. This caterpillar feeds on the 

 watercress and one or two other plants. 



Lastly, there is the Gtreen Chequered White (Pieris Da- 

 plidice), whicli derives its name from the beautiful green 

 mottlings of the under surface of the lower wings. It is a very 

 local insect, and is generally taken on the coast of Kent. 

 Mr. E. Newman has a theory that, although a few specimens 

 may be had in England, it is properly a French insect, and is 

 blown across the Channel. This theory is strengthened by the 

 fact that Butterflies have been seen to cross the Channel, 

 settling on the water when tired, and taking to wing with- 

 out difficulty. August is the best month for finding this 

 insect. 



There is also the little W^ood White (Leucophasia sinapis), 

 a small, rather narrow- winged, slow-flying insect, with white 

 wings clouded with black at the ends of the upper pair 

 Generally this spot, or cloud, is more or less squared. 



Closely allied to the Whites is the beautiful Orange-tip 

 [Anthocharis cardamines), so well known by the orange-tipped 

 wings of the male, from which it derives its popular name. 

 .The female is without the orange hue, but both sexes have the 



