208 C R. Osten Sacken: Diptera 



Antennae reddish-brown, the distal half of the third joint dark 

 brown, or black; arista white, except the root, which is black. On the 

 head a black spot on each side, between the antenna and the eye; 

 a brown streak on the facial orbit, and a large black spot on the ver- 

 tex. Thorax with a blackish stripe in the middle of the mesonotum, 

 interrupted before the suture; a deep black, subtrianguler spot behind 

 the humeral callus; a smaller blackish dot between this spot and the 

 suture; a large, rounded, deep black spot behind the suture and above 

 the root of the wing; scutellum brown on each side, yellow in the 

 middle; on the pleura, a dark-brown streak between the front coxa and 

 the humeral callus; a large dark brown spot on the sternopleura, be- 

 tween the front and middle coxae, and another on the hypopleura, 

 above the hind coxae. On the abdomen a broad dorsal brown stripe, 

 gradually attenuated posteriorly, and ending on the fifth segment. 

 Halteres pale yellow. Coxae and femora reddish-yellow; tips of the 

 femora bladk; tibiae and tarsi dark brown. Wings with a distinct 

 yellowish tinge, which is more saturate along the costa; fourth vein 

 arcuate, converging towards the third. — A single female. 



NB. T. tnaccus diflPers from T. Mnotatus Bigot (Syn. Coenurgia 

 remipes Wk.) by the pair of large deep black spots behind the tho- 

 racic suture, the brown sides of the scutellum etc. 



Nerius duplicatus Wied. (A. Z. II, 553; Java). — A single 

 specimen which I have agrees very well with Wiedemann's description. 

 I have already alluded to the difficulties attending the identification 

 of species of this group from mere descriptions. (See 0. S. Enume- 

 ration etc. 64). 



Nerius fuscus Wied. A. Z. II, 550. The coloring of the spe- 

 cimens varies from that, described by Wiedemann, to an almost uni- 

 form dark brown. The length of the second autennal joint is variable; 

 in the males it is generally (but not always) longer than the third; in 

 the females they are nearly of equal length. I feel more convinced 

 now, than I was before, of the synonymy oifuscusVf., phalanginus 

 Dol. and fuscipennis Macq. (see my Enumer. 63). 



Ortalidae. 



Scholastes cinctus Guerin. (For the synonymy compare my 

 Enumer. etc. 91). This wide-spread species seems to be common in 

 the Philippine Islands. The eyes, which I have revived on wet sand, 

 are green, with three horizontal purple stripes. 



