Plate 25
Supella supellectilium, c. X 6.3. A, Male. B, Female.
Plate 26
Bacteroids from Blattella germanica. A, Part of abdomen showing mycetocytes in fat body, X 225. B, Lobe of fat body showing 3 mycetocytes, X 750. C, Single mycetocyte; bacteroids appear hollow as result of fixation in Carnoy's fluid, X 1725. D, Smear of fat body showing bacteroids in various stages, X 1800. (All preparations and photographs through the courtesy of Dr. Marion A. Brooks.)