ACIDALIA RUBRICATA. 89 
began to hybernate. On the 15th of that month I 
took a description as follows: 
Length nearly half an inch, slender, but of average 
Acidalia proportions; head larger than the second 
segment, notched on the crown ; body cylindrical, and 
of nearly uniform width, but slightly thickening pos- 
teriorly; segmental divisions distinct, each finely 
ribbed transversely, which gives the skin a rather 
rough appearance, being also rough to the touch ; 
general colour greyish brown; head grey, marked 
with smoke-colour ; medio-dorsal line indistinct to the 
tenth segment, faint rust-colour; on the remaining 
posterior segments broad and distinct, dull black. 
When seen through a lens, however, the faint rust- 
coloured dorsal line seems to run very narrowly 
through the broad black of the posterior segments ; 
on each of the other segments the black appears in 
the shape of two short parallel black marks, one on 
each side the dorsal line; there are no perceptible 
subdorsal lines; spiracular lines puckered, lighter than 
the ground colour; ground colour of the belly similar 
to the dorsal surface; it is bordered on each side by 
a conspicuous, dark smoky, subspiracular line. 
When at rest the food-plant is grasped by the 
claspers, and the body bent in a curved position, more 
so than in any other Acidalia larva I have noticed. 
In this position my larva remained a great part of the 
winter, but the very severe weather we had appeared 
to have been too much for it, as I found it dead on 
examining my hybernating larvee in the early part of 
February. | 
What its food 1s in a natural state I believe is as yet 
unknown. (George T’. Porritt, 3rd March, 1871; 
Knt., April, 1871, V, 275.) 
