560 K. KEETESZ 



between the costa and the fifth vein not being entirely filled 

 out with brown. The venation is different ; the second vein does 

 not form that bold curve upwards, to come in contact with the 

 first before its tip, and then gradually merge in the costa, but 

 takes the ordinary course, with gentle sinuosities and ends in 

 the costa a little beyond the tip of the first vein. The structure 

 of the costa in the male is very peculiar : there is a distinct 

 depression or sinus about the middle of the anterior margin , 

 in consequence of which the costa comes almost in contact with 

 the first vein , the latter being free at both ends only. The costa 

 shows, at its proximal end, a peculiar swelling abouth 2 mm. 

 long., with an abrupt, rounded ending, and a cross -suture 

 before the middle; it is clothed with a microscopic pubescence ". 



Lànge 8,5-9 mm. 



Neu- Guinea, Paumomu ri v., IX-XII, 1892 (Loria). 



2. Ol. amalbilis O. S. 



Cleitamia amabilU Osten-Sacken, Ann. Mus. Civ. Genova, XVI, p. 468, fig. 

 » » v. d. Wulp, Catal. Dipt. South Asia, p. 178. 



In Loria's Ausbeute befindet sich diese Art nicht. Die Be- 

 schreibung lautet nach Osten-Sacken: ti d*. Face yellowish, 

 opaque, more reddish above, silvery below the antennae; front 

 dark brown or black, subopaque, with a velvet-black angular 

 crossband above the antennae; on each side of this band the 

 orbit of the eye is silvery; upper part of the front on each side 

 with a round, opaque, velvety spot; above these spots, the 

 vertex is metallic-blue; posterior orbits silvery. Antennae brown; 

 third joint reddish-yellow; arista brown, short plumose, yellow 

 at base. Thorax reddish -brown, darker in front, opaque: pleurae 

 with a sericeous down , more distinct posteriorly. Abdomen 

 shining -black, with greenish-metallic reflections , clothed with 

 a microscopic, whitish pubescence (distinct from a side view only), 

 and with' half a dozen stiff, long bristles at the tip (in the <?)> 

 Halteres black. Legs black; femora, except the ends, yellow; 

 front coxae yellow. Wings: a large triangular brown spot oc- 



