112 C. R. Osten Sacken: Diptera 



Philodicus longipes Schiner, Novara 179 (Philippine Isl.) 

 Four specimens. 



Itamus, two Q. closely related to /. longistylus Wied., but 

 front side of the hind femora black. 



There are about twenty other, badly preserved specimens, repre- 

 senting about a dozen species, that belong in the genera Asilus, 

 Proctacanthus and Erax, or in their vicinity. 



Bombylidae. 



Argyramoeha distigma Wied. A. Z. I. 309 (Syn. Anthrax 

 argyropyga Dol. II Bijdr. 25?) My specimens are males, and therefore 

 agree with Doleschall's description. Wiedemann had a female. The 

 synonymy was suggested by Mr. v. d. Wulp, Tijdschr. XXIII, 166, and 

 seems very probable. 



Argyramoeha sp. Similar to the former, but without the two 

 black drops on the hyaline portion of the wing. 



Exoprosopa Oenomaus Rond. Ann. Mus. Civ. Gen. VIl, 37 

 (Hyperalonia). 



Exoprosopa flaviventris Dolesch. II Bijdr. 24 (?) 



Although the descriptions agree, I am by no means certain of the 



identification of the two above mentioned species. Both resemble 



Exopr. Doryca Boisduv. (Syn. ventrimacula Dol., Pelops Wk. leuconoe 



Jaenn.) very much, but differ as follows (if my identifications be correct): 



I. The brown color on the wing covers the proximal half of the 

 discal cell; second posterior cell narrower at its distal end than at the 

 proximal; venter with yellow pile in the middle; the white pile on the 

 two last abdominal segments has the shape of crossbands. 



Oenomaus. 



II. The brown color on the wings does not encroach upon the 

 discal cell. 



1. A spot of snow-white pile on the ventral segments 2 — 4. 

 Second post, c, much broader (more than twice) at its distal, 

 than at its proximal end; the white on the two last abdominal 

 segments has the shape of spots, rather than of crossbands. 



doryca. 



2. Venter almost altogether clothed with yellow pile. 



Second post, cell very little broader at its distal end; the 

 white on the two last abdominal segments is in the shape of 

 crossbands. jiaviventris. 



Exoprosopa sp. Perhaps small specimens of Tantalus? 



