OWLET-MOTHS. 17: 
“~ 
moths already described. The leech-like caterpillar (Fig. 
174) is flattened, having the body thick in the middle and 
tapering towards each end. It is of a grayish-brown color, 
like the bark upon which it hides while resting. When full 
grown it is alittle longer than an inch and a half, is dull 
grayish-brown above, with two or four small reddish 
tubercles on each segment of the body, all encircled by a 
slight ring of black at their base. On the upper part of the 
ninth segment is a stout and fleshy horn about one-twelfth 
of an inch long, pointed, and similar in color to the body, 
Fig. 174.—Catacola ultronia Hub. 
but with an irregular grayish patch on each side. On the 
twelfth segment there is a low, fleshy ridge, tinted behind 
with deep reddish-brown; there is also an oblique stripe on 
this segment of the same color extending forward. 
Along the sides of the body, and close to the under sur- 
face, there is a thick fringe of short, fleshy looking hairs of a 
delicate pink color. The under side is also pink, deeper in 
color along the middle, with a central row of nearly round 
black spots, which are largest from the seventh to the 
eleventh segment. 
These caterpillars are not uncommon; they prefer the 
foliage of the plum-trees, upon which tree they sometimes 
occur in large but never in destructive numbers. When the 
