FIGURES 20–26 in Nests, Floral Preferences, and Immatures of the Bee Haetosmia vechti (Hymenoptera: Megachilidae: Osmiini)

FIGURES 20–26. SEM micrographs of cells and cocoons of Haetosmia vechti. 20. Front end of cocoon in figure 18, showing filter area. 21. Filter area of another cocoon. 22. Same, close-up, showing surrounding fibrous area. 23, 24. Inner cocoon surface demonstrating: (1) transparency of silk surface; note debris seeming to "float" on surface and (2) the near disappearance of elongate streak of white material (arrows), which reflects shape and not color; figure 24 with cocoon on left and edge of wall with thin fecal layer and resin wall on right. 25. Another area of cell wall with cocoon on left, showing cluster of presumed microorganisms on inner surface of wall beneath cocoon and impression of organism indicated on undersurface of cocoon. 26. Closeup of microorganisms, suggesting that more than one species may be involved.