408 
LEPIDOriERA. 
The last of these insects is the rubicunda (Fig. 201) of 
Fabricius, or rosy Dryocampa. This delicate and very rare 
moth is found in Massachusetts in July. Its fore wings 
are rose-colored, crossed by 
a broad pale-yellow band ; 
the hind wings are pale yel- 
low, with a short rosy band 
behind the middle ; the body 
is yellow ; the belly and 
legs arc rose-colored. It 
expands rather more than one inch and three quarters. The 
caterpillar is unknown to me.* 
All the Moth caterpillars thus far described in this work 
live more or less exposed to view, and devour the leaves of 
plants ; but there are others that are concealed from observa- 
tion in stems and roots, which they pierce in various direc- 
tions, and devour only the wood and pith ; their habits, in 
this respect, being exactly like those of the Algerians among 
the Sphinges. These insects belong to a family of Bomby- 
ces, bj r some naturalists called Zeuzeiiad.e, and by others 
Hepialtd.e, both names derived from insects included in the 
same group. The caterpillars of the Zeuzerians are white 
or reddish white, soft and naked, or slightly downy, with 
brown horny heads, a spot on the top of the fore part of the 
body which is also brown and hard, and sixteen legs. They 
make imperfect cocoons, sometimes of silk, and sometimes 
of morsels of wood or grains of earth fastened together by 
gummy silk. Their chrysalids, like those of the Cerato- 
* Only one more North American Dryocampa is known to me. This moth was 
taken in North Carolina, and does not appear to have been described. It may be 
called Dryocampa bicolor , the two-colored, or gray and red, Dryocampa. The 
upper side of the fore wings and the under side of the hind wings are brownish 
gray, sprinkled with black dots, and with a small round white spot near the 
middle, and a narrow oblique dusky band behind it on the fore wings; the upper 
side of the hind wings and the under side of the fore wings, except the front edge 
and hinder margin of the latter, are crimson-red, and the body is brownish gray. 
The male expands two inches and a quarter. The female and the caterpillar of 
this insect I have not seen. 
Fig. 201. 
