173 



The caterpillar is pale green. 



The date of the appearance of the caterpillar is in 

 September. 



It feeds on the birch. 



The chrysalis is enclosed in a case of earth or among 

 moss. 



CABERA EXANTHEMAR1A. 



COMMON WAVE. 

 Plate XXV. Figure 4. 



THIS insect measures an inch to an inch and a quarter 

 in expanse. 



Male: fore wings dull white, covered all over with a 

 dusting of dull yellow speck. The first line is dull yel- 

 lowish-brown and slightly curved, second line dull yel- 

 lowish-brown and slightly curved and indented, third line 

 also dull yellowish-brown. Hind wings dull white frosted 

 all over with dull yellowish, and crossed by two very 

 faint dull yellowish-brown waved lines. 



Localities for this species, which is extensively dis- 

 tributed throughout the country, are Buttercrambe Moor, 

 Humberstone. 



The situations where it is found are woods. 



The perfect insect appears in May and again in August. 



The caterpillar is yellowish-green, the back the darkest, 

 and with reddish-brown spots on it sometimes; on the 

 sides a white line. 



The date of the appearance of the caterpillar is in 

 June and September. 



