SCANNING ELECTRON MICROSCOPIC INVESTIGATING DIFFERENT TYPE OF SENSORY SENSILLAE ON THE HEAD APPENDAGES OF ASIAN TIGER MOSQUITO, AEDES ALBOPICTUS (SKUSE)

In Aedes albopictus various types of sensillae were on the head and its appendages with distinctmorphological features. The antennae and maxillary palps play a major role in host detection,and other sensory-mediated behaviors. Six long sensilla chaetica were arranged in circularshape and spread uniformly across the diameter of the antennal flagellomers. Maxillarypalp is a relatively simple organ compared to antennae, consists of five segments, which denselycovered dorsal side with flattened scales, but chemosensory sensilla on ventral side. Thus,a desirable model for exploring neuromolecular networks surrounds chemo- and mechanosensation.Proboscis analyses gustatory code via food intake and involved in identification. Labellumexhibits the most of sensory structures on the proboscis. Numerous sensillatrichoidea distributeon antennal flagellomers.A significant difference in diameter of sensillacoeloconica that protruding from distal tip ofantennal flagellomers. Sensillachaetica with greater morphological variation were distributedthroughout Ae. albopictus head and appendages. Variation between different sensillae indicatestheir functions. Aporous sensilla play the mechanoreceptive role but, porous sensillawere contact chemoreceptors and olfactory ones. sensory mechanisms were extensivestudied, about Asian tiger mosquito, Ae. albopictus sensory systems is insufficient.