56 Bulletin Wisconsin Natural History Society. [Vol. 9, Nos. 1-2. 



of it will apply equally as well to the one under direct observation, 

 at this time, insofar as the development of the eggs and larvae are 

 concerned. The whole nest, however, was not obtained, the middle cell 

 having remained behind attached to the petiole which was out of 

 reach. The mother wasp returned twenty minutes later and made an 

 examination of the remains of the nest upon which she passed the 

 night. The nest was not rebuilt and as far as could be ascertained no 

 new nest was strated. This nest was composed of eleven cells, ten 

 of which were occupied — four by half -grown larva?, six by eggs and one 

 empty (injured when taking the nest). The larvae were all erect in 

 their cells and with a forceps one was easily removed by gently 

 grasping it and pulling. It was found to be attached to the apex of 

 the cell by means of a short, pallid nipple-like petiole which is sticky, 

 secreting a colorless, stickj' fluid which adheres to the skin (the larva 

 could be lifted bodily by applying the tip of the finger to this viscous 

 projection). The nipple-like petiole just described is white, the re- 

 mainder of the body being soiled greyish, tinged with pinkish. The 

 larva is fusiform, smooth and shining, unarmed at any part, the 

 nipple less smooth, opaque. Its head is blunt, the mouth parts fleshy, 

 the mandibles well developed, acute, yellowish, fleshy proximad, all 

 of the org-ans prehensible, sucker-like and the mouth is central in 

 relation to the mouth of the cell. The cervical shield is narrow, 

 transversely roughened, minutely papillate ; head dusky, from dorsal 

 aspect with a median longitudinal white dash and one of similar 

 appearance laterad, which is oblique and farther cephalad, pointing 

 cephalo-laterad, all three lines broader at base ; mesad of the tips 

 of each of the oblique lateral stripes is an ocellate white round spot, 

 conspicuous, apparently setigerous but bearing no visible seta ; an- 

 tennae not visible. On the head, farther cephalad, near the large 

 labrum are two transverse white stripes, one across the cephalic edge 

 of the clypeus and the other along the cephalic edge of the labrum ; 

 two pairs of short fleshy appendages — the upper pair being maxillae 

 — armed with two short, black hooks at apex, are also visible. From 

 the dorsal aspect the head is seen to be finely papillate, scatteringly 

 so, roughened less than the cervical shield. The mouth is continually 

 in motion and is very sensitive. The spiracles are minute. 



When the larva? are removed from the cells the egg-shells from 

 which they have hatched are still found adhering to the cell walls, 

 where the egg was deposited. The six eggs in the nest under con- 

 sideration were pale, normal. 



