SENSILLA ON THE LARVAL ANTENNAE AND MOUTHPARTS OF THE EUROPEAN SUNFLOWER MOTH, HOMOEOSOMA-NEBULELLA DEN-AND-SCHIFF (LEPIDOPTERA, PYRALIDAE)

Sensilla on the larval antennae and mouthparts of Homoeosoma nebulella (Lepidoptera: Pyralidae) were examined with a scanning electron micro scope. The antenna possesses 2 aporous sensilla chaetica, one aporous sensillum styloconicum, 3 large multiporous sensilla basiconica, and 3 small multiporous a. basiconica. The labrum bears 12 aporous s, chaet ica and the epipharynx has 6 aporous flattened s, chaetica and 4 epiph aryngeal sensilla. It is the first time that more than 2 epipharyngeal sensilla have been reported in caterpillars. The mandible possesses 4 aporous s. chaetica. Each galea bears 2 uniporous s. styloconica, 2 s mall aporous s. basiconica, one s. campaniformium and 3 aporous s, cha etica. Each maxillary palp bears a distal group of 8 uniporous s. basi conica, one large s. digitiformium and one pore plate. Minute grooves exist on the s. digitiformium. Each labial palp possesses one aporous s. chaeticum and one aporous s. styloconicum. An attempt has been made to identify the function of sensilla by comparing them with those of other larvae.