Chrysops nigribimbo:
Chrysops sp., commonly referred to as a deer fly, is a vector of human disease in places such as Africa for parasites like Loa loa, the African eye worm. This study sought to describe some of the sensory structures within the labrum and into the foregut of the biting fly focusing primarily on the setiform and basiconic sensilla. The distal portion of the labrum, the vestibule, always contains two basiconic sensilla and two setiform sensilla, followed by the food canal which contains two basiconic sensilla and a variable number of setiform sensilla. The cibarium, proximal to the labrum, consists of the epipharyngeal region containing only setiforms, the median patch containing both types and the stomaedeum which contains two pairs of basicones. SEM was used to investigate and characterize the morphology of the sensilla. All setiform were found to be aporous. Basicones appear to be aporous with differently shaped bodies.