PSYCHE. 
tance along the midrib, in the case of G. 
pseudacaciella, which also feeds on locust 
leaves. 
purpuriella was certainly bred from locust 
leaves, whatever be its mode of feeding 
thereon. 
Coleophora. 
A species of this genus which I have not 
succeeded in rearing, mines the leaves of 
elm (Ulmus americana), sometimes in 
large numbers. All of the larval cases 
that I observed had been cut out from the 
edge of the leaf, showing the serrations 
along the dorsal surface of the case; yet 
it was frequently found in these cases feed- 
ing generally over the under surface of the 
leaves. It must therefore retire to the 
edge of the leaf to feed shortly before 
changing its case. 
Gelechia pseudacaciella. 
In the note on Aeaea purpuriella above, 
I have referred to the web of the very 
young larva of this species as being very 
similar to the web (or mine?) of A. pur- 
puriella ; being placed like it at the junc- 
tion of a vein with the midrib, but differing 
from it by having a narrow strip of web 
extending along the midrib. But G. pseud- 
acaciella does not continue long to feed in 
this way. It may afterwards be found — 
sometimes when nearly grown — feeding 
between two of the leaflets sewed together ; 
but much more frequently it may be found 
in the mines of Jvthocolletis robiniella, and 
more rarely in those of Lithocolletis orna- 
tella. I have sometimes seen it deliberate- 
ly cut its way into the mines of L. robiniel- 
la ; and when there it does not confine itself 
to a vegetable diet, for I have opened the 
mines and fownd the larva inthe act of eat- 
ing the pupa of its host. Ido not know 
At any rate, the specimen of A. 
65 
that it eats the larva of L. robiniella, though 
from the frequency of the occurrence of G. 
pseudacaciella in mines of L. robiniella from 
which the latter larva was absent, I suspect 
that it does. Possibly the struggles of the 
L. robiniella larva might drive that of G. 
pseudacaciella away ; but I know that the 
pupa is eaten, having seen it. 
I have never found the larva of G. pseud- 
acaciella except on locust trees ; but Prof. 
Riley once showed me two specimens of 
a Gelechia moth which I was unable to 
distinguish from G. pseudacaciella, and 
which Mr. Riley said he had bred from 
larvae found on wild cherry (Prunus sero- 
tina). It is not likely that the larva feeds 
on two plants so remote from each other as 
locust and wild cherry ; but a larva which 
varies its diet of locust leaves by an occa- 
sional repast on the living pupa of a Litho- 
colletis, need not be supposed to be exces- 
sively fastidious. 
The only difference that I have observed 
between the very young and the mature 
larvae of G. pseudacaciella is that the 
markings are more prominent in the latter. 
There is a larva of an unknown species 
and genus which burrows in June and July 
in the pith of the preceding year’s shoots 
of Robinia pseudacacia. The markings 
and form of the ventral segments are not 
very different from those of G. pseuda- 
caciella but the head and thoracic segments 
are enlarged and are of a black or piceous 
hue, and the mouth parts are large and 
It 
has sixteen well developed legs and prolegs. 
It probably will form the type of a new 
genus. It can hardly be the unknown 
larva of Xylesthia clemensella, for that 
larva feeds in the solid wood of locust 
strong, as becomes a burrowing larva. 
