_Male._ Black, narrow; head silvery white in front; mystax with very few white bristles; third joint of the antennæ elongate-conical; arista a little longer than all the preceding joints together; pectus whitish cinereous; abdomen brown, each segment with a black triangular spot and with a whitish hind border; legs tawny; knees and tarsi black, the latter tawny at the base; wings greyish, exterior half blackish; veins black; halteres testaceous. Length of the body 4-4-1/2 lines; of the wings 7-8 lines. Gen. LEPTOGASTER, _Meigen_. 56. LEPTOGASTER MUNDA, n. s. _Mas._ Cinerea, capite argenteo, proboscide antennisque fulvis, thorace lineis duabus fuscis, abdomine longo gracili apicem versus subdilatato, segmentorum marginibus maculisque quatuor subapicalibus testaceis, pedibus fulvis, femoribus tibiisque posticis nigro fasciatis, alis subcinereis, halteribus testaceis. _Male._ Cinereous; head silvery white; proboscis and antennæ tawny; thorax with two brown lines; abdomen long, slender, slightly dilated towards the tip, hind borders of the segments testaceous, two testaceous spots on each side towards the tip; legs tawny, hind femora and hind tibiæ with a black band on each; wings slightly greyish; veins black, tawny at the base; halteres testaceous. Length of the body 6 lines; of the wings 8 lines. Fam. LEPTIDÆ, _Westw._ Gen. LEPTIS, _Fabr._ 57. LEPTIS FERRUGINOSA, _Wied._ See Vol. I. p. 118. Heliomeia ferruginea, _Dolichall._ Dr. Dolichall has described this species and several other Diptera in a Zoological Journal published in Java. I am unable to refer to this work, but have adopted the names with which he has ticketed the species in Mr. Wallace's collection. _Heliomeia_ has the aspect of _Leptis_, but is distinguished by the subanal and anal veins being united before they join the border of the wing, thus agreeing with _Chrysopila_, from which it differs in the shorter third joint of the antennæ, and in the more slender arista. Gen. SURAGINA, n. g. _Foem. Corpus_ lineare. _Caput_ thorace vix angustius. _Proboscis_ porrecta, compressa, capitis latitudine paullo brevior. _Palpi_ lanceolati, porrecti. _Antennæ_ brevissimæ; articulus 3^{us} rotundus; arista gracilis, nuda. _Abdomen_ subdepressum, thorace non duplo longius, apice obtusum. _Pedes_ nudi, inermes, longiusculi, sat graciles. _Alæ_ mediocres, areola discali longissima.