云南局限蚊属一新种(双翅目:蚊科)

A NEW SPECIES OF THE GENUS TOPOMYIA FROM YUNNAN PROVINCE, CHINA (DIPTERA: CULICIDAE)

本文记述了从云南西部边陲采获的局限蚊属局限蚊亚属Topomyia一新种,其主要特征是雌蚊小盾前区具平覆宽白鳞区;雄蚊前足跗节Ⅱ明显长于跗节Ⅲ,第9背板具发达的鬃列以及小抱器刀叶宽大呈帽状等,在本亚属中较为特殊而易与其它种区分。

Topomyia (Topomyia) baolini sp. nov.Female Small, dark. Wing 3mm. Palpus dark scaled. Proboscis dark brown, with vertral yellow line on basal portion. Anterior pronotal lobes covered with broad, flat silvery scales; Posterior pronotal lobes covered with broad, flat pale yellow scales. Prescutellar space with a triangle of silvery scales. Sutellum with broad silvery scales on midlob. Metapleuron with a group of dark broad scales on the mid portion. Legs mainly dark, forefemur with ventral yellow line; mid leg with vertral yellow line from base of femur to apex of tibia; hind leg with ventral yellow line from base of femur to base of t1. Tergites dark brown, Ⅰ-T, Ⅱ-T with large lateral silvery spot; Ⅲ-Ⅶ T each with a broad lateral pale spot from base to apex, but dosal margin not forming straight line. Sternites drab yellow scaled.Male Resembles female except for the following characters: Proboscis with ventral yellow line to subapex. Prescutellar space and scutellum dark scaled. Foretarsus t2 longer than t3 (1.0: 0.8). Hind leg with ventral yellow line from base of femur to apex of t1 and apex 2/3 of t2. Ⅰ-Ⅵ T each with a narrow lateral white spot, dorsal margin forming straight line. Terminalia IX T lobes inconspicuous, each with about 7 strong setae, none between lobes. Ⅸ S with sclerotized band on the apex and base. Vertro-medial lobe of basimere with a tuft of curved setae; dorsomesal area with many long setae. Distimere with a leaf-like appendage on the stem subapically. Vertral lobe of claspette large, subquadrate, bearing 2 prominent setae and many short setae; stem of dorsal lobe rod-like and with a large cap-like filament.The new species is readily distinguished from the other members of the subgenus by the female prescutellar space with a triangle spot of silvery scales, male fore tarsus t2 longer than t2, and the shape of Ⅸ T and claspette.Holotype female, allotype male and paratypes 1 male and 1 female, all collected from Ying-jiang County (25,1°N, 97.8°E), Yunnan province (August, 1986, Gong and Duan). all types are deposited in the Research Institute of Epedemic Diseases of Yunnan Province, China.