REPORT OF THE STATE ENTOMOLOGIST 1901 (43 
(pl. 2, fig. 3, 4). The distended abdomen of a gravid female is dark 
red, the color evidently being derived from the contents. The 
abdomen of the male is nearly black, and the clasps are tipped 
with two very short, minute teeth. 
The puparium is subconical, about 3 mm long, with the 
anterior two thirds a dark straw yellow and the posterior third 
a dark rufous. 
The cephalic horns of the pupa are pointed, confluent at the 
base and of a hight equal to their greatest width. The promi- 
nent dorsal processes are slender, slightly crooked when ob- 
served from the side and with a length equal to about one third 
of the diameter of the pupa (fig. 15). The slender, setaceous pro- 
cesses are shown at plate 2, figure 2. The pupal mandibles are 
four toothed, tipped with light brown chitinous and the ventral 
tooth is nearly twice the size of the one next it which in turn is 
larger than the others. All curve some and taper to acute 
points. 
The larva is stout, orange red, with 11 easily distinguished 
Segments. It is about 3} mm long, and the “breast bone,” or 
sternal spatula, is nearly black, enlarged slightly at both ex- 
tremities and two toothed anteriorly (pl. 2, fig. 1). 
Fia@. 16 Caterpillar of carpenter moth (original) 
The reddish orange eggs are deposited on the leaves by cap- 
tive flies in irregular clusters or groups of three to six or more, 
frequently side by side. They are lanceo-elliptic in outline and 
about * of a mm in length. 
This insect produces many celled galls in the stems of small 
willows. At the time the insects appear, the bark over the 
‘infested part turns brown or black and, the pupae working 
partly through a circular orifice, discloses the imago. The 
pupal case remains projecting from the gall, and usually there 
