_Female._ Black, broad, with long bristles. Head whitish; frontalia black, linear; facialia without bristles; epistoma not prominent. Eyes pubescent. Palpi testaceous. Antennæ extending to the epistoma; 3rd joint linear, rounded at the tip, full four times the length of the 2nd; arista slender, very much longer than the 3rd joint. Thorax hoary, with four black stripes. Scutellum tawny towards the tip. Abdomen obconical, hardly longer than the thorax, with a broad hoary band on each segment. Legs slender, hardly setose. Wings grey, brownish in front; veins black; præbrachial vein forming a slightly obtuse angle at its flexure, from whence it is slightly curved inward to its tip; discal transverse vein straight except a slight curve by its hind end, parted by much less than its length from the border, and by rather more than its length from the flexure of the præbrachial. Alulæ white. Length of the body 3 lines; of the wings 6 lines. Singapore. Gen. ZAMBESA, n. g. (_Plate I. Fig. 2._) _Mas._ _Corpus_ longum, angustum, subcylindricum. _Facies_ verticalis, subretracta. _Facialia_ nuda. _Epistoma_ planum. _Palpi_ longiusculi, sat graciles. _Antennarum_ articulus 3^{us} gracilis, linearis, 2^o sexties longior; aristâ gracillimâ. _Oculi_ nudi. _Abdomen_ lineare, thorace multò longius. _Pedes_ longiusculi. _Alæ_ sat augustæ. _Male._ Body long, narrow, almost cylindrical. Face vertical, slightly retracted towards the base. Facialia without bristles. Eyes remote, bare. Palpi rather long and slender. Antennæ extending to the epistoma; 3rd joint slender, linear, rounded at the tip, six times the length of the 2nd; arista very slender, rather longer than the 3rd joint. Abdomen linear, much longer than the thorax. Legs rather long. Wings rather narrow; costal vein ending at hardly in front of the tip of the wing; brachial vein joining the cubital. 71. ZAMBESA OCYPTEROÏDES, n. s., mas. Nigra, capite albo, frontalibus atris, antennarum articulo 3^o fulvo, thorace cano nigro-quadrivittato, abdominis fasciis duabus latis interruptis semihyalinis albido-testaceis, femoribus testaceis apice nigris, tibiis piceis, alis limpidis, apice margineque postico cinereis.