FIGURES 58–63. SEM micrographs of nipple end of cocoon of Stelis ater with outer layer of cocoon removed. 58. Part of nipple removed to expose passageway from tip of nipple to screened surface. 59. Close-up of screen forming base of chamber. 60. Part removed from nipple, showing texture of inner surface thought to result from larva pushing silk forward from inside the cocoon. 61–63. Close-ups of area identified by rectangles in figure 61, respectively; note changes in surface texture of silk, with silk of inner chamber shiniest.

Published as part of Rozen, Jerome G. & Hall, H. Glenn, 2011, Nesting and Developmental Biology of the Cleptoparasitic Bee Stelis ater (Anthidiini) and Its Host, Osmia chalybea (Osmiini) (Hymenoptera: Megachilidae), pp. 1-40 in American Museum Novitates 2011 (3707) on page 24, DOI: 10.1206/3707.2, http://zenodo.org/record/5359259