Fig. 1 a, b

Male specimen of Pediculus humanus capitis under stereoscopic microscopy (SM). a Dorsal view of the distal end of the dilator (dil) at rest. b Male in copulation position; the vesica stem (vs), vesica (v), and penis (pn) can be observed. Abbreviations: dil, dilator; vs, vesica stem; v, vesica; pn, penis