Pediculus humanus,
mycetome in ventral wall of midgut. (X750.)
Pediculus humanus,
mycetome in ventral wall of midgut. (X750.)
A, in larva (male), showing mycetome lying between epithelium
of midgut (mg) and ventral wall of abdomen (st). The symbionts
lie in groups separated by septa.
B, in embryo, showing primary mycetome now degenerating (pm)
among yolk cells in gut (y), and symbionts in definitive
mycetome (my) in gut wall.
(After Ries.)