Spolia Mentawiensia: Diptera Nematocera.

The collection reported upon below was sent to me for determination by the Director of the Buitenzorg Museum having been obtained by Messrs. H.H.Karny, C.Boden Kloss and N.Smedley during their visit to the Mentawi Islands in September-Octobar, 1924...Allactoneura cincta de Meijere. Siberut, 1 f. A long series of this species recently received from the Malay Peninsula shows that A. nigrifemorata de Meij. (with all femore completely black and yellow band on fourth abdominal segment incopmlete) is merely the female of A. cincta.