The following notes of observations of some stages of these two little saw-flies are fragmentary and incomplete, but they are now given as they may be of some assistance to others working upon this group of insects.

Taxonus nigrisoma, Nort., Larva.—The fully grown larva is cylindrcal, and 10 to 12 millimeters long. It is of a pale green colour above, very slightly darker towards the sides above the spiracles, the spiracle line being marked by very minute dark dots one to each segment; and the under side (including the abdominal or prop legs) is of a dull whitish colour.