98 G. JR. Osten Sacken: Diptera 



(4. Suppl. 32), I take pleasure in dedicating this fine species to its 

 first describer; his description I translate, supplementing it from my 

 specimens. 



„Ochraceous, front very narrow, with a median blackish 

 line; eyes glabrous; antennae testaceous [tip of the third joint 

 black]; -anterior margins of [some of] the abdominal segments 

 dark brown; legs black; wings with two brown crossbands; costal 

 cells saturate yellow.^'' — Length: g 18 mm; Q 20-23 mm. 



Head ochraceous- yellow, with hairs of the same color on the 

 underside; the front (Q) very narrow, linear, with a darker, raised, 

 central line, which is only slightly expanded below. Head of the male 

 of moderate size, flattened above; the dividing-line between the upper, 

 large, and lower, small facets, very marked. Eyes glabrous, bronze- 

 color, without markings. Antennae yellowish-red, the tip of the third 

 joint black or dark brown; first segment drawn out in a point on the 

 upper side; the second very short, prolonged above in a point; the 

 third but moderately excised. Palpi reddish -yellow, beset with minute 

 black hairs , mixed with fulvous ones in the 5 ; in the male there are 

 some few black hairs at the tip only. Thorax and scutellum blackish, 

 which color is entirely concealed under a dense ochre-yellow pollen; 

 pleurae with ochre -yellow pile. Abdomen brownish -red, the hind 

 margins of the segments beset with golden -yellow pile; the anteriour 

 portion of the segments is more or less dark brown, the extent and 

 intensity of this color varies in different specimens; generally the first 

 and second segments have no brown ; on segments 3 — 6 , sometimes 

 the anterior half, sometimes more, is more or less dark brown, the 

 brown band being more or less distinctly narrowed in the middle. The 

 male specimen has comparatively little brown. Venter, except at the 

 base, dark brown or black; hind margins of the segments yellowish- 

 red, beset with golden-yellow pile. Coxae of the same color as the 

 thorax; legs dark- brown or black, with black pile. Halteres reddish- 

 yellow. Wings: proximal third and especially the costal cells tinged 

 with yellow; a brown spot, in the shape of a crossband, covers the 

 central crossveins, coalescing anteriorly with the saturate yellow of the 

 costal cells , and attenuating posteriorly without reaching the posterior 

 margin; in the distal third of the wing a broad brown crossband reaches 

 from the anterior to the posterior margin; its distal side shows a tri- 

 angular grayish -hyaline excision, within the second submarginal cell; 

 the proximal end of this cell, however, is brown; first posterior cell 

 closed, petiolate at the end; anterior branch of the third vein without 

 stump of a vein; (one of the specimens has a mere rudiment of a 

 stump). — One male; four females. 



