THE BERGMANNIAN TORTRIX. 507 



wings. If one of these wings be taken by itself, it looks exactly 

 as if the insect had met with an accident, and had a large 

 piece torn out of the upper edge. This notch, from which the 

 insect takes its name, occupies fully one-third of the length of 

 the wing, and is rather deeper towards the base than the tip. 

 It is rather a variable insect, but the deep and long notch is 

 sufficient for identification. Generally, the ground colour of 

 the upper wings is soft grey-brown with a satiny gloss. About 

 the centre of the wing the colour warms into chestnut, and 

 a narrow edging of the same colour surrounds the wing. The 

 edge of . the scallops is white, and a dark grey band is drawn 

 beneath them, and taking the same outline. 



The caterpillar of this little Moth feeds on the sallow, and 

 is green, with a yellow head. The Notchwing prefers the 

 north of England to the south. 



On the rose-tree is often seen a little white caterpillar with 

 a black head. If approached quietly, it can be detected while 

 feeding on the leaves, but if the branch be jarred, the cater- 

 pillar drops for some distance, letting itself down by a silken 

 line. This is the larva of a very destructive little Moth, called 

 the Bergmannian Tortrix (Bictyopteryx Bergmanniana). 



The upper wings of this insect are rather long, and their 

 upper edge is decidedly arched in front. The colour of these 

 wings is grey with a dash of ochreous yellow, pencilled indis- 

 tinctly with broAvn, and across them are drawn two diagonal 

 whitish marks having a silvery lustre. On the hind margin 

 there is a brown band, variegated with minute white spots. The 

 best way of getting rid of the insect is to tap the stem of the 

 rose gently, when the larvae will let themselves drop, and can 

 easily be taken as they hang suspended by their silken life- 

 lines. 



About the exact position of the little Moth which comes next 

 on our list there has been considerable uncertainty, some ento- 

 mologists placing it in the genus Lozotsenia. As, however, we 

 accept in this work Mr. Doubleday's well-known catalogue, we 

 place it in the position which he gives it. The popular name of 

 this Moth is the Afternoon Tortrix, and its scientific title 

 Cnephasia musculana. Both these names refer to its colour, 

 the former word being taken from the Greek, and sigaifies 



