35 
like before, except that they are much broader and about 0.8"™" in 
length; the surface of the body is now densely and finely rugose, and 
the sutures between the segments have become deep and broad; there 
is also a depressed subdorsal line around the body; the tail is broad, 
semicircular, more distinet than before, and furnished with 4 to 6 
hairs. The antennz are still three-jointed, the second joint being 
much the longest and cylindrical and the third joint minute or rudi- 
mentary. They are dark brown or black and greasy looking. 
Third generation; adult female; fourth stage (Fig. 18).—The adult 
female of this generation is broadly oval and measures 1.2 to 1.4"™" in 
length and 1 to 1.2" in diameter. After casting the -last skin they 
are deep black, convex, and densely 
and coarsely rugose, with three rather 
prominent, short, and rounded trans- 
verse ridges about the middle of the 
body, and irregular rows of pits and 
depressions each side of the median 
line. The edge of the body is closely 
lined with about 120 short, secretory 
tubercles and about 14 similar ones 
along the edge of the tail, producing a 
continuous, but very narrow, waxy 
fringe around the body. The dorsal 
surface is at first bare, but soon be- 
comes covered with a whitish, powdery 
secretion, which gives to the insect a 
moldy appearance; this changes grad- 
ually into scattered, delicate, waxy 
flakes or seales, which, toward the ap- 
proach of spring, form a solid and 
continuots waxy covering, most dense 
or solid along the sides and the end of P16: 18:—H#amamelistes spinosus: a,adult 
= female, third generation, dorsal view; 
the body, giving them a dark Silvery- __, lateral view; c, ventral view; d, an- 
gray appearance, on account of which enna Gua JSee uel cnlerned 
they assume a remarkable resem- 
blance to certain species of the Lecaniid genus Ctenochiton. Advane- 
ing to maternity, the ventral side of the body becomes very much 
inflated and assumes a box-like appearance, as in some Aleurodids, 
and is covered with a powdery secretion. The antenne are now very 
small and rudimentary and apparently but two jointed, though there 
may be three, which, however, could not be ascertained with certainty 
on account of the very dark color and the coarse rugosity of the body. 
The legs are as in the previous stage, except that the hind tarsi are 
only about half as long as before. 
Pseudo-galls, or corrugations (Fig. 19).—About the middle of 
April, or just about the time of bursting of the leaf-buds of the 
