202 C. R. Osten-Sachen: Diptera 



behind the ocelli, there is a semicircular, pale golden- sericeous spot, 

 which reflects the light in such a way, as to appear larger or smaller, 

 according to the point of view; facial orbits reddish, or, in a certain 

 light, silvery; palpi brown; antennae dark brown; third Joint short, but 

 little longer than broad, arista reddish at base, subglabrous (vestiges 

 of a minute pubescence are perceptible in some specimens). Thorax 

 dark metallic greenish, shining, more bluish towards the scutellum; on 

 the mesonotum two subsolete stripes with a pale golden lustre, arising 

 from a delicate pollen on the metallic ground color; they begin midway 

 between the anterior margin and the mesonotal suture and run, with 

 parallel sides, as far as the scutellum; their antei'ior ends are rounded 

 off, and, at the suture, they are incised and somewhat interrupted; on 

 each side, the interval between the stripes and the pleura is velvet black, 

 which color also fiUs out the interval between the anterior end of the 

 stripe and the humerus; on the mesopleura a large golden -sericeous 

 spot is prolonged in the shape of a stripe towards the middle coxa; 

 metanotum yellowish- sericeous. Abdomen black, with slight bluish re- 

 flexions; first segment pale yellowish sericeous; the second blackish 

 on the proximal; the third on the distal half. Kälteres with a brown 

 knob; peduncle yellowish. Front coxae brownish, golden sericeous; 

 front femora reddish -yellow at base; the remainder black, as well as 

 the tibiae; front tarsi white, brown at the root only; the four bind legs 

 yellowish-red; base of the femora more yellowish; three brownish rings 

 on the femora, the one nearest the base being often the darkest; the 

 two others generally subobsolete; tarsi brownish. Wings yellowish- 

 hyaline; a pale brownish crossband covers the posterior crossvein; its 

 sides are parallel ; the proximal side passes midway between the cross- 

 veins; apex slightly infuscated, as far as the tip of the second vein; 

 the infuscation often obsolete; first posterior cell very much attenuated 

 towards the apex, although open. Length 10 — 12 mm. (without the 

 ovipositor). — Five males, four females, 



Calohata {Taeniaptera) galhula n. sp. g$. Exceedingly 

 like 0. chrysopleura, but very easily distinguisted by its bright yello- 

 wish-red antennae. Front coxae reddish-yellow (and not brown, golden- 

 sericeous), the four bind tarsi brownish-yellow at the base, brownish 

 towards the tips; palpi reddish; the pubescence of the arista a little 

 more distinct; the first segment of the ovipositor much shorter; a corre- 

 sponding difference seems to exist in the anal appendages of the male, 

 but I cannot make it out distinctly. 



NB. Calob. splendens Wied. II, 539 (also Schiner, Novara, frora 

 Ceylon) have many points in common with this species; still thorax 

 and abdomen disagree. 



