Nest structure of Celonites fischeri: 22–24 Nest GB 22 Original condition on 26 May with frontal emergence hole probably made by C. fischeri. 23 Nest covering partly removed to show hollow spaces underneath; cell GB1 opened containing meconium of C. fischeri at basal end 24 Cell GB2 opened, showing brittle brown cocoon of unidentified holometabolic insect in basal half and small emergence hole apical in the cell wall 25 Nest S on 27 May. Cells S1, S3, S4, S5 (ordered from the left) with frontal emergence holes probably made by C. fischeri 26 Nest F on 1 June after dissection of cells F1 and F2 (cell content summarized in Table 2).