[Ultrastructure of the head surface of selected Bovicolidae (Mallophaga, Ischnocera)].

On the basis of morphological examinations of the head of Bovicola caprae, Cervicola meyeri and C. tibialis, carried out in the scanning electron microscope, the species descriptions received up to now, were supplemented with new characters. An attention has been paid to rather primitive type of antennal sesilla coeloconica (with developed cone) as well as the lack of accompanying pore organs, characteristic also of other Ischnocera.