204 C. B,. Osten Sacken: Diptera 



broad, dark brown, except in the upper corner, imder the arista, where 

 it. is yellowish; arista black, sligthly incrassate and yellowisb at the 

 base; plumose on the upper side only; front ferruginous, brownish 

 around the ocelli, whitish-pollinose along the upper frontal orbit; the 

 rest of the head, including proboscis and palpi ochraceous. Thorax 

 yellowish ferruginous; abdomen ochraceous - brown ; halteres yellowish. 

 Legs yellow or reddish-yellow; tips of all the femora brown; tips of 

 the four posterior tibiae and their tarsi brownish; the four bind femora 

 are considerebly longer than the abdomen; the front femora (in the 

 male) are less than half as long as the bind ones , and beset , on the 

 underside with a row of small spines; those of the female are compa- 

 ratively a little longer and have no spines. Wings yellowish, a little 

 more saturate along the costa; the tip of the second vein is far beyond 

 the posterior crossvein; the first posterior cell is considerably coarctate, 

 but not closed; the anterior and posterior basal crossveins are in a 

 line ; anal cell very little oblique. The male has a rather lai'ge ventral 

 forkhke appendage; the hypopygium itself is not large. The first 

 Segment of the ovipositor is about as long as the two preceding abdo- 

 minal Segments taken together. — One male, one female. 



NB. The plumose arista, the presence of a transverse swelling 

 under the scutellum, the very narrow clypeus, hardly projecting under 

 the oral margin, the long second vein, the presence of only a single 

 hair at the end of the front coxae and the absence of the fringe of 

 hairs on the pleura, above the middle coxae (they are replaced by 3 

 or 4 slender hairs), distinguish this species from those of the genus 

 Taeniaptera. There is a pair of postvertical bristles; the fronto- 

 orbital are represented by a long upper one, and two lower ones, 

 nearly as long as the upper one (at least it is the case in my female 

 specimen) ; there are two posthumeral , a long scuteller pair etc. The 

 first abdominal segment is shorter than in the Taeniapterae , and the 

 first segment of the ovipositor of the female seems to be narrower at 

 the base and broader at the tip, in other words to have more parallel 

 sides (I say seems, because it is somewhat crushed in my specimen); 

 the two posterior pairs of legs are comparatively longer. 



Eurybata 



nov. gen. 

 Very like Nestima (0. S. Enumer. etc. 69); from which it diflfers 

 in the structure of the metanotum, the upper portion of which, sepa- 

 rated by a groove from the lower, ha,s the shape of a transverse swel- 

 ling, and not of a cone. The elongated , slender thorax, attenuate 

 anteriorly almost in the shape of a cone, the long bind legs and long 



