I20 LEPIDOPTERA. 



head to the edge of the fourth segment ; subdorsal lines 

 indicated by yellowish dots ; anal flap broadly outlined with 

 yellow ; spiracles white, edged with black ; head green with 

 four conspicuous pale lines in front, those in the middle 

 paler; outer edges of the lobes broadly margined with ferru- 

 ginous, edged with yellow ; legs and tips of prolegs reddish- 

 brown. (C Fenn.) The anal segment is not usually elevated, 

 and the anal prolegs are of fair size ; but the head and 

 anterior segments are thrown up in a singular manner during 

 repose, the reddish legs conspicuously visible in front. When 

 younger the dorsal and subdorsal lines are visible — pale green 

 or yellow — and the lines on the head yellow ; the yellow 

 oblique lateral lines being brighter "and edged with brighter 

 crimson. When quite full-fed the whole larva becomes of a 

 dull purplish hue. 



End of June, July, sometimes to the beginning of August, 

 on oak, feeding exposed on the leaves, clinging to them, or to 

 the twigs, with great tenacity. Somewhat difficult to rear 

 unless allowed plenty of fresh air, and frequently sprinkled 

 with water, which it likes to drink. 



Pupa elongate, cylindrical, rounded at both extremities ; 

 the margins of the wing-cases hardly projecting ; dark 

 shining purplish-brown. Subterranean ; enclosed in a large 

 flat oval cocoon compactly made of silk, and covered exter- 

 nally with grains of sand. (C. Fenn.) Usually placed at 

 the root of an oak-tree in a corner or under a sod of grass. 

 In this condition through the winter, and sometimes over a 

 second winter. 



The moth flies only at night, probably not earlier than 

 10 P.M. It is readily attracted by a strong light, and has 

 occasionally been found sitting on the frame of a gas lamp, 

 looking from its grey colour, and extended downy legs, like 

 one of the lumps of mud with which such lights are 

 commonly embellished by idle boys. The male has also been 

 captured toward midnight, though not in any numbers, by 



