Abstract
1) The specimens of the black fly were collected in the city areas of Tottori and Yonago. 2) Eggs, larvae and pupae of the species were identified, and the morphology for all stages of its development was clarified and described. 3) This species was clarified to belong to the subgenus Boophthora Enderlein. 4) This species appears to be new, and Simulium (Boophthora) yonagoense was proposed as the new name. 5) Laboratory rearing of this species from egg to adult could be successfully carried out using the method similar as the rearing method of S. salopiense reported by Yoshida and Nakanishi in 1956. 6) The larval stage reared at 10 to 15℃ was for 26 to 31 days, and at about 20℃ for 13 to 24 days. 7) The pupal stage at about 10℃ was for 9 to 12 days, averaging about 10 days, and at about 20℃ for 2 to 6 days, averaging a little more than 3 days. 8) The size of the adults reared indoors from eggs was not much different from that collected in the nature. The sex ratio of the species generated indoors was also practically the same as that observed in the nature. 9) The present species is distinguished from S. argyreatum, S. heringi, and S. bujakovi of the same subgenus by the absence of spots and the presence of sparse silver-white pubescence on the mesonotum and by blackish brown color all over the femora. The present species is also distinguished from its morphologically similar species of S. tuberosum by the velvet black mesonotum, by the color of the pubescence of the mesonotum, and by the dendriform construction of the respiratory filament.
