Sensory organs of mesostigmatic mites (Acarina, mesostigmata) dwelling in body cavities of mammals and birds
Receptors on palps and fore tarsi of <i>Pneumonyssus simicola </i>Banks, 1901, <i>Raillietia auris </i>and <i>Raillietia </i>sp. (Trouessart, 1902) (Mesostigmata: Halarachnidae), dwelling in lungs and ears of mammals, and of <i>Sternostomoides turdi </i>(Zumpt et Till, 1905) and <i>Tinaminyssus sp. </i>(Mesostigmata: Rhinonyssidae), dwelling in nasal cavities of birds, were examined in a scanning electron microscope. Morphological changes of sense organs, associated with adaptation to parasitizing in body cavities, are discussed.