BOARMIA CONSORTARIA. 83 
two prominent humps; two other, but much smaller, 
humps on the twelfth segment, and still two more 
small ones, pointing horizontally, at the extreme tip 
of the thirteenth seement; skin smooth, but with a 
slightly wrinkled appearance. 
The colour varies extremely in different specimens, 
but the variations are mostly among the brown forms. 
Var. | has the ground coloura pale glaucous-green, 
and through it the alimentary canal can be distinctly 
seen, and forms a darker ereen dorsal line; head yellow, 
but almost covered with pale brown mar bling; ; the man- 
dibles and a few small dots at the bottom of the side of 
each lobe, very dark brown; the humps on the sixth see- 
ment chocolate-brown, the smaller ones on the twelfth 
segment paler brown; spiracles large and distinct, 
white, encircled with very dark brown. Ventral area 
of the same colour as the dorsal surface, but having a 
pale pinkish stripe extending longitudinally through 
its) centre; the legs marbled with pale brown like 
the head, anal seoment and prolees yellowish-brown, 
the extreme bases of the latter dark chocolate-brown. 
Judging from my larvee reared from several batches of 
egos, this is the least common form. 3 
Var. 2 has the ground colour brown, yellowish, or 
greyish, strongly marked or marbled with dark brown 
or red-brown; the top of the head in these forms 
having a pale yellow streak, edged above with very 
dark brown or black, and the head generally being 
much darker than in Var. 1; the warty humps on 
the sixth and twelfth segments are dark chocolate- 
brown, the tips in some examples being red; spiracles 
pale, encircled with very dark brown or black. The 
ventral surface partakes of the colouring and marbling 
of the dorsal area, but the broad central stripe is much 
more conspicuous than in Var. 1; in some cases it is 
ochreous-brown, with smoky edging throughout its 
length; in others, generally the darkest larvae, the 
ochreous is interrupted at intervals with patches of 
darker colouring. The legs and prolegs vary so 
VOU Vit. 3 
