jEgeriidae 
been transported to Australia, is an importation into this country 
from Europe. It feeds in the stems of gooseberry- and currant- 
bushes. 
(6) Synanthedon pictipes Grote & Robinson, Plate XLV 1 , 
Fig. 24, $ . 
Syn. inusitata Henry Edwards. 
The larvae feed under the bark of plums, wild and cultivated 
cherry-trees, peach-trees, the June-berry ( Amelancbier ), and the 
chestnut. The eggs are laid on the trunks and the branches of 
the trees. The moths are on the wing in June and July. 
(7) Synanthedon acerni Clemens, Plate XLVI, Fig. 28, $. 
Syn. acertcolum Gennadius. 
This is the common “ Maple-borer.” The larvae tunnel in the 
sap-wood and do a great deal of damage to trees, especially in 
our larger cities. At times trees are completely girdled by the 
galleries made by the insects, and 
are thus killed; at other times they 
are so weakened that on the occasion 
of high winds or storms they are 
broken off and greatly disfigured. 
The insects emerge from the pupae 
early in the morning, and may be 
seen at times in small swarms about 
the trunks of the trees, ovipositing 
upon the bark. The time of emer¬ 
gence is the latter part of May and 
the beginning of June. The pupae 
are formed in small cocoons com¬ 
posed of silk and pellets of excre¬ 
ment interwoven upon the surface. 
Just before the moths emerge, the 
chrysalids work their way partially 
out of the tunnels in which they are, 
and then the outer sheathing of the 
pupa splits open and the perfect 
insect crawls forth, in a few moments to be upon the wing; foi 
the development of the power of flight is with this species, as 
with almost all the 'AEgeriidce , exceedingly rapid. 
The moth is found from New England as far west as Nebraska. 
386 
Fig. 215. — S. acerni. a, larvae ; 
b, cocoons ; c , male ; d, pupa pro¬ 
jecting from burrow. (After Riley.) 
