18 THE ENTOMOLOGIST, 



each of which emits a slender hair. Head opaque, clear 

 sienna-brown, the face paler, the cheeks somewhat reticu- 

 lated, the labrnra and antennal papillae white : body clear 

 sienna-brown, with two closely approximate very narrow 

 umber-brown medio-dorsal stripes : the skinfold on each side 

 is decorated with five or six long yellow spots ; these are on 

 the 5th, 6th, 7th, 8lh, 9th, and sometimes the 10th segment; 

 they are bordered above and below by deeper brown, which 

 makes them more conspicuous ; sometimes the yellow is dif- 

 fused and extends the entire length of the body : belly pearly 

 gray, with a tinge of pink ; legs and claspers pinkish gray, 

 the latter with a pale yellowish exterior line. It spins a few 

 silken threads, forming a slight web or coating on the sur- 

 face of a leaf, and attaches itself thereto by the anal claspers ; 

 it then spins a stronger thread, forming a girdle or belt, and, 

 supported by this, it changes to a pupa much in the same 

 way as the larvae of the genus Pieris among butterflies : the 

 pupa is square and truncated at the anterior extremity, look- 

 ing as though it had been cut in two ; the angles produced 

 into two small projecting points ; very pointed at the poste- 

 rior extremity, and furnished at the apex with eight curved 

 hooks, which spread right and left, and by which it is at- 

 tached to the silken web on the leaf: its colour is pale brown 

 and semitransparent, the back clothed with dark brown, the 

 projecting points on each side the head, and a line extending 

 from them along the outside of the wing-cases white, the 

 outer part of the wing-cases dark brown : the wing-rays are 

 so strongly pronounced as to give the wing-cases the appear- 

 ance of being longitudinally striated. These larvae and pupae 

 are commonly to be found on the dwarf pollard beeches 

 which retain their leaves throughout the winter, the margins 

 of the leaf generally curling over and concealing the pupa ; 

 when the leaf falls in the spring, the pupa is of course con- 

 veyed gently to the ground, and the perfect insect makes its 

 appearance at the end of April or beginning of May, and 

 from that time to August there is an almost constant suc- 

 cession. Note. — In a beautiful variety, of which Mr. Wright 

 took two examples at Epping, the head was reddish brown, 

 the face slightly paler ; the body apple-green, with nume- 

 rous irregular whitish markings, which formed longitudinal 

 but interrupted waved lines throughout the body ; the lateral 



