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



June 12: — By 6. a. m., two more larvae had nearly completed the 

 caps of their cells, which must have been commenced during- the night ; 

 these two cells adjoin the first, one on each side of it, and are undoubt- 

 edly the next two oldest. The mother wasp was absent at 6 :20 a. m., 

 returning at 6 :43, apparently without anything. She was busy at the 

 nest and abroad, through the day. At 1 :30 p. m. an egg was deposited 

 in the fifteenth cell and adjoining the fourteenth cell, a sixteenth 

 cell was commenced, which received an egg on the following day 

 (thirteenth). Day cloudy, cooler; clear and warm by noon. 



June 16: — By this date, two more larvae had prepared for pupa- 

 tion by capping- their cells ; all of the capped cells are comparatively 

 very long, measuring 20 mm. During severe showers at 3 :30 p. m., the 

 mother wasp remained away from the nest, having been overtaken 

 by the storm. She did not return immediately after the storm, not 

 until 5 p. m. 



June 11 : — At 4 p. m. todaj r a sixth larva had completed the silken 

 cap to its cell. At 2:50 p. m., the female commenced a new (seven- 

 teenth) cell, against the south of the fifteenth ; she deposited an egg 

 into it at 5 p. m Earlier, at 11 :30 a. m., she was observed to go to a 

 cell, scrape against its mouth with her mandibles and, having in this 

 manner attracted the larva's attention, her head was extended to meet 

 that of the larva, and the latter's head then grasped with the man- 

 dibles, bringing the two mouths together ; this was repeated at all cells 

 containing large larvae. Food was probably reg-urgitated to each, 

 though the actual process could not be seen. 



June IS: — An eighteenth cell was commenced today against the 

 seventeenth, but no egg was deposited into it. The mother wasp was 

 absent from 7 to 8:15 p. m., or up to darkness and she did appear 

 during the night. She was still absent at 6 a. m., June 19. At 

 7 p. m. today, the following - : 



Number of cells IS 



Number of cells capped 6 



Number cells with eggs 4 



Number cells with larvae 6 



Number empty cells 2 



One of the empty cells is a large central one. 



June 19: — At 6 o'clock this morning the female was still absent 

 from the nest and a little later she was accidentally found crawling 



