154 OWLET-MOTHS. 
chestnut-colored stripe along the back, margined with yel- 
lowish. On each segment are several shining tubercles, from 
each of which arise one or more blackish hairs; other 
hairs are found along the sides of the body. The caterpillar 
is about one inch long, and has the body somewhat com- 
pressed, so that it appears higher than is usua!ly the case. 
It does not assume the usual position at rest as the other 
members of this genus which curl up somewhat in the shape 
ofasnail. The cocoon is made among dead leaves and isa 
rather slight affair. 
The moth has a gray thorax and abdomen, dotted with 
black points. The fore-wings are dark-gray, with black or 
brownish-black markings; the hind-wings are lighter brown- 
ish-grav. The moth expands about an inch and a half, it is 
illustrated in Fig. 154, as well as the caterpillar. 
Only in extreme cases are these insects common enough 
to cause serious injury. 
THE RASPBERRY DAGGER-MOTH. 
(Acronycta impressa Walk.). 
The caterpillars of this insect are always common, some- 
times very much so, in which case they cause some injuries. 
They are very general feeders, occurring in Minnesota on 
the raspberry, blackberry, apple, rose, hazel, and many 
other plants. Although numerous the caterpillars always 
feed singly. They are hairy caterpillars, measuring an inch 
and a quarter in length when in motion, but less thanan inch 
when at rest, as they hump their body in a peculiar man- 
ner. The body is thickest between the third and the seventh 
segment, and tapers a little towards both extremities; it is 
of a brownish-black color, with a transverse row of paler 
tubercles on each segment, from which spring clusters of 
brownish-white or grayish-hairs of varying lengths. Behind 
the third segment there is a space on the back where the 
