


BOARMIA ABIETARIA. 23 
cular warts rather prominent, especially the hinder 
dorsal pairs, which are larger than the front pairs, 
and as well as those along the sides are on little tumid 
eminences. Of the ground colour there are two varie- 
_ ties : one is light ochreous-brown, having conspicuously 
paler cream-coloured patches on the back of several 
segments; the other variety is dark greyish-brown 
with paler patches, sometimes of light cinnamon- 
brown, often palest on the fifth, ninth, and tenth 
seoments ; the head is much freckled with reddish- 
brown, and has a brown conspicuous spot on the front 
of each lobe, and another just above each papillus ; the 
dorsal line on the thoracic segments is but just indi- 
cated by very short double black marks at their divi- 
sions, but it is more complex on the other segments, 
being composed of a fine central pale thread within 
two lines or series of brown freckles, which widen 
gradually as they approach between the second pairs 
of tubercles, and then as gradually contract towards 
the end of each segment; these are followed in a 
parallel direction on either side of the back by a pale 
line edged outside with a line of brown freckles, some 
lighter, some darker, and after an interval of ground 
colour by the pale subdorsal stout lme, edged on both 
sides with a thin line of brown freckles; the front 
pairs of warts are black on the fifth, sixth, seventh, 
eighth, and ninth segments; and the hind pairs, 
though pale in part, are involved in a strong black 
mark which, flowing from them, darkens the parts 
of both adjacent lines to the segmental division; 
sometimes, but not often, these black markings are 
present on the four hinder segments, otherwise the 
warts only bear a black dot; along the side occurs a 
faint pale wavy line, edged below with black, but this 
is interrupted for a space just behind each lateral 
black wart, and again continued to the segmental 
division ; the spiracles are of the ground colour, 
roundish-ovate in form, and strongly outlined with 
black, and in front of each is a short line of a few 
