348 
The Ohio Naturalist 
[Vol. V, No. 7, 
yellow locust midge {Cecidomyia robin iac), and after a little 
waiting the writer was rewarded by witnessing the oviposition 
of an egg in the hole thus made. This leaf was collected and 
preserved but the egg failed to hatch. 
Mr. O. H. vSweezy* reports having found the nearly full 
grown larva of this beetle in similarly rolled up leaves of the 
black locust at East Cleveland, and further says “they were in 
a sort of a cocoon.” which was not the case with those develop- 
ing in the locust buds at Marietta. He collected a few leaves 
containing the larvae and “on July G, two adult beetles 
appeared.” It is hardly probalde that this is a second brood of 
this insect, because the seasonal differences between the south- 
ern and northern portions of the state should account for about 
one-half of the month’s time between the appearance of the 
adults at Marietta and East Cleveland. The other two weeks 
may easily be accounted for in the straggling of the brood, which 
is often noticed even in insects that appear distinctly in broods. 
It will require at least another season’s observations to make 
sure of this point. 
This curculio occupies a position between those, the larva of 
which, feed wholly upon the leaves, and those which develop in 
the seeds. This adaptation to a bud feeding larva is peculiar in 
that it shows a verv remarkable acceleration in the larval devel- 
opment, and one that is somewhat unusual. The entire devel- 
opment, from egg to adult, must be accomplished within three 
weeks and ]Jossibly in a shorter time. This may mean a cor- 
responding long life period for the adult insects as they may be 
found at any time from early in May until the middle of Sep- 
tember, and must pass the winter in this stage. 
In the same buds were also found a large number, of some- 
times as high as forty or fifty, small yellow larvae, probably 
dipterous, which did not develop to adults and which are still 
undetermined. 
Description of larva; The larva is a small white footless grub, 
about one-fifth inch in length as it lies in a curved position in the bud ; 
head about one-third of the diameter of the body, brownish in color with 
a few scattered spines or hairs; body thick, tapering abruptly to a blunt 
point at the posterior end; a few scattered hairs on the three thoracic 
segments. 
Pupa. White or yellowish-white , one-fourth inch long, slenderer 
than larva; head slightly darker in color than body, and witli ten spines 
on top and front; snout folded along under side of body; two pairs of 
spines on dorsal side of the third thoracic segment, and two spines on 
posterior end of abdomen, also one at the end of the femur of each leg. 
Note — This work was undertaken as part of a thesis for graduation in 
the College of Agriculture, on the "Insects of the black locust,” and is- 
under the direction of Prof. Herbert Osborn. 
* Unpublished notes made during summer of U04. 
