348 The Ohio Naturalist. [Vol. V, No. 7^ 



yellow locust midge (Cecidoinyia robiniae), 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. Sweezy* 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 6, two adult beetles 

 appeared." It is hardly probable 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 tiine 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 very 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 possibly 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 stilt 

 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 with 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 tmdertaken as part of a thesis for graduation in- 

 the College of Agriculture, on the "Insects of the Vilack locust," and is. 

 under the direction of Prof. Herbert Osborn. 



* Unpublished notes made during sumnicr of 1^04. 



