96 C R. Osten Sacken: Diptera 



that the last 4 or 5 joints are altogether brown, Thorax with three 

 brown stripes, the intermediate one wedge-shaped, rather broad in front; 

 the edges of these stripes are opaque, while their inner surface is 

 shining, and shows a slight metallic lustre; the narrow intervals between 

 these stripes, as well as a narrow transverse line on the prothorax, are 

 pale whitish-yellow ; the same color is more or less visible along the 

 thoracic suture, especially in the middle; the portion of the mesothorax 

 behind the suture, partakes of the color of the thoracic stripes; scu- 

 tellum brownish, metanotum brown in the middle, yellow in the sides. 

 The pleurae show a mixture of yellowish and brownish, and are slightly 

 pruinose. Halteres with a brown knob. The abdomen seems to be 

 variable in its coloring; in one of my specimens, which shows the color 

 more distinctly, it is reddish-yellow, with a brown stripe along the su- 

 ture on each side, and a series of large brown spots, one in each of 

 the dorsal Segments 2 — 7, the anterior and lateral sides of the segment 

 remaining yellow; venter altogether yellow; in the other specimen the 

 whole abdomen, including the venter, is reddish brown, except a row of 

 bright-yellow spots along the back, on the anterior margins of the 

 intermediate dorsal segments. I cannot say whether these differences 

 were produced after dissication, or represent varieties ; the specific 

 identity cannot be doubtful. Legs pale tawny, tips of femora and of 

 tibiae brownish ; tai'si brownish towards the end. Wings hyaline, veins 

 brown; Stigma small, pale brownish. — Length 9 — 11mm. Two males. 



Bibiouidae. 



Plecia fulvicollis Fab. Numerous specimens. 



Mycetophilidae. 



Sciara sp. One specimen. 



Cecidomyidae. 



A Single specimen, belonging to Winnertz's group I (three longi- 

 tudinal veins, the third being forked). Only three joints of the flagellum 

 are present (the rest being broken), but these have a peculiar structure, 

 slightly resembling those of Nephrotoma. 



Culicidae. 



Culex several specimens, damaged. 



Megarrhina, one male; detennined by Walker as M. immise- 

 rzcors Wk., although abdomen and legs do not agree with his des- 

 eription. It may be amboinensis Dol., although the agreement is 

 not perfect. 



