COLLECTED AT SINGAPOltE AND MALACCA. 21 



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 ; 

 praebrachial 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 prae- 

 brachial. Alulae white. Length of the body 3 lines ; of the wings 6 lines. 

 Singapore. 



Gen. Zambesa, n. g. {Plate I. Jig. 2.) 

 Mas. Corpus longum, angustum, subcylindricum. Fades verticalis, subre- 

 tracta. Facialia nuda. Epistoma planum. Palpi longiusculi, sat gra- 

 ciles. Antennarwm articulus 3 US gracilis, linearis, 2° sexties longior ; arista 

 gracillima. Oculi nudi. Abdomen lineare, thorace multo longius. Pedes 

 longiusculi. Alee sat angustae. 

 Male. Body long, narrow, almost cylindrical. Face vertical, slightly retracted 

 towards the base. Facialia without bristles. Eyes remote, bare. Palpi rather 

 long and slender. Antennae 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. 



11. Zambesa ocypteroides, n. s., mas. Nigra, capite albo, frontalibus 

 atris, antennarum articulo 3° fulvo, thorace cano nigro-quadrivittato, ab- 

 dominis fasciis duabus latis interruptis semihyalinis albido-testaceis, femo- 

 ribus testaceis apice nigris, tibiis piceis, alis limpidis, apice margineque 

 postico cinereis. 



Male. Black. Head white, with short white hairs beneath ; frontalia deep 

 black, linear. Proboscis testaceous. Palpi black. Third joint of the an- 

 tennae tawny. Thorax hoary, with four black stripes, of which the outer 

 pair are very much broader than the inner pair. Abdomen a little narrower 

 than the thorax, with two broad whitish testaceous semihyaline bands which 

 are interrupted above. Femora testaceous, with black tips ; tibiae piceous. 

 Wings limpid, grey towards the tips and along the hind borders ; veins 

 black ; praebrachial vein forming an obtuse angle at its flexure from whence 

 it is slightly curved inward to its tip, which joins the cubital very near the 

 border ; discal transverse vein very slightly curved inward, parted by less 

 than its length from the border, and by more than its length from the 

 flexure of the praebrachial. Alulae white. Length of the body 5 lines ; of 

 the wings 10 lines. 



Singapore. 



Subfam. Dexides, Walk. 

 Gen. Dexia, Meigen. 

 72. Dexia divergens, n. s. (gen. Thelaira, Desv.), mas. Cana longa an- 



