Morphology and distribution of the sense organs on the antennae of Copitarsia consueta (Lepidoptera : Noctuidae)

Five types of sensilla were found on the antennae of adult Copitarsia consu eta (Walker) (Lepidoptera: Noctuidae) by scanning electron microscopy and l ight microscopy. Those sensilla were trichoidea, coeloconica, styloconica, basiconica and squamiformia. Two types of sexually dimorphic sensilla trich odea were found; type I is in the border of the sensory field of the flagel lar segments and present only on male antennae. This suggests that the sens illum may contain the receptor sites for the female sex pheromone. Type II is located within the ventro-medial sensillar field where it is arranged wi thout apparent pattern. Six types of sensilla chaetica were found around an tennal segments, and were particularly abundant on the apical antennal segm ent. One sensillum styloconicum was identified per segment, except far the apical segment, where it varies in number. Each sensillum consists of a bas e, a stalk and a cone. Each flagellar segment bears several sensilla coeloc onica on the ventral surface, situated on or near distal edge. Each sensill um consists of a depression surrounded by 15 to I? "teeth" and one peg. Two types of sensilla basiconica were identified, type I is more curved and br oader than type II.