THE MARBLED WHITE 61 
The Marbled White 
[Female ab. captured at Chattenden, Kent, 
23.7-1375). 
lilac line bordering a broad whitish band above, and a darker 
band below ; immediately above the spiracles is a faint double 
line of pinkish and white ; which is duplicated below the 
spiracles, but is much more distinct. The ventral surface, 
including the legs and 
claspers, is ochreous. The 
head is pinkish-ochreous ; 
the anal points are lilac- 
red. The body is densely 
studded with white warts 
each emitting a long white 
spinous hair. The larva of 
this butterfly is one of the 
longest lived ; one which 
hatched on August 27th 
became fully grown on the 
following July 20th and pupated on July 23rd, having lived 
in the larval state for 340 days. 
Being nocturnal feeders, the larvae may be found during the 
daytime by searching the base of grass upon which they feed. 
When about to pupate, they crawl to the base of the stems 
and simply lie on the surface or among the moss, fibres and 
other material accumulated at the base of the plant. After 
lying for three or four days, they pupate. 
Pupa. The pupa varies considerably in size according to 
sex. The male averages about 12 mm., the female 15 mm. 
The head is rounded; at the base of the wing is a black, 
rough, granulated spiracle projecting prominently and re¬ 
sembling a little black horn. The abdomen is swollen across 
the middle and acutely tapers 
to the anal segment, which 
ends in a conical point, fur¬ 
nished with a bunch of straight, 
rather clubbed spines in place 
of cremastral hooks. The 
entire surface is finely granu¬ 
lated, the eyes and limbs are 
outlined with brown. The 
The Marbled White head and pro-thorax are 
[Male ab. capture^ Rochester, . the abdomen 
