Figure 10

Pediculus humanus, longitudinal section of head.

bf, buccal funuel; cbp, cibarial pump; dp, dilator muscles of pharynx; h, haustellum; o, oesophagus; p, pharynx; sd, salivary ducts; sp, sphincters; ss, stylet sac.

(schematic, modified from Peacock 1918, and Sikora, 1916, central nervous system omitted.)