190 C. R. Osten Sacken: Diptera 



The remaining portion of the segments is deep velvet- black, opaque 

 anteriorly, and black subopaque, or faintly shining posteriorly; the 

 latter half of the fourth segment is more shining and sometimes reddish, 

 as well as the g hypopygium. Halteres with a pale yellowish knob. 

 Legs brownish -yellow, more or less mixed with brown; hind femora 

 incrassate, especially in the male; without spine on the underside. 

 Wings with a dingy brownish-yellow tinge, more brownish on the apical 

 third, and more ochraceous along the costa; first basal cell subhyaline. 

 Length 18—23 mm. — Two males, one female. 



NB. Must be very like M. jlavifacies Bigot (Borneo), from which 

 it differs in having the third abdominal yellow crossband not inter- 

 rupted ; moreover, Jlavifacies is said to have a yellow venter and me- 

 tallic blue reflections on the abdomen. 



Milesia Bigoti n. sp, $Q. Face silvery, abdomen with 

 alternating Hack opaque and bluish-black somewhat shining 

 crossbands; a narrow, interrupted, obscurely marked yellowish- 

 brown crossband on the fourth segment; hind femora without 

 spine; wings reddish- yellow, apex infuscated. Length.- g 22 — 

 23 mm.; Q. 18 mm. 



Face silvery; cheeks shining black, as well as a spot above th^ 

 oral margin, in the middle; frontal triangle in the $, silvery; vertical 

 triangle black, its apex golden -sericeous; in the $ front and vertex 

 are black; frontal orbits golden- sericeous. Antennae brownish -red. 

 Thorax black, subopaque, with three narrow, golden -sericeous cross- 

 bands (anteriorly; in the middle, along the suture; and posteriorly, 

 before the scutellum); the first is a little interrupted, the second sub- 

 interrupted; the sides of the mesonotum have a slight bluish -metallic 

 reflection. Scutellum black, but little shining. A silvery sericeous 

 vertical band across the meso- and sternopleura. Halteres reddish. Ab- 

 domen black, opaque in the middle of the segments; at the base of 

 segments 2—4 a narrow, shining black crossband, slightly interrupted 

 in the middle and a little expanded at the sides, replaces the yellow 

 crossbands that occur in the same place in other species (for instance 

 M. conspicienda Wk., or Semperi OS.); on the fourth segment alone, 

 the black, shining crossband bears an obscurely marked reddish, inter- 

 rupted crossband in the middle; the posterior portions of segments 

 2—4 are more or less shining, on segment 4 sometimes obscurely 

 reddish; all the shining portions of the abdomen have a slight bluish 

 reflection, which is hardly apparent in some specimens. Femora black, 

 reddish -brown at the end; the hind pair, above, have a blue metallic 

 reflection, which is very bright in some specimens and hardly apparent 



