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.
Fœm. Corpus lineare. Caput thorace vix angustius. Proboscis porrecta, compressa, capitis latitudine paullo brevior. Palpi lanceolati, porrecti. Antennæ brevissimæ; articulus 3us rotundus; arista gracilis, nuda. Abdomen subdepressum, thorace non duplo longius, apice obtusum. Pedes nudi, inermes, longiusculi, sat graciles. Alæ mediocres, areola discali longissima.
Female. Body linear, moderately broad. Head almost as broad as the thorax; vertex and front of equal breadth. Proboscis porrect, compressed, a little shorter than the breadth of the head. Palpi lanceolate, contiguous to the proboscis. Antennæ very short; 3rd joint round; arista slender, bare, longer than the antenna. Thorax a little narrower in front. Abdomen somewhat flat, less than twice the length of the thorax, obtuse at the tip. Legs bare, unarmed, rather long and slender. Wings moderately long and broad; radial vein slightly curved; forks of the cubital vein a little longer than the preceding part; 3rd externo-medial vein inclined beyond the discal areolet towards the 4th, which is straight; subanal and anal veins united close to the border; discal areolet nearly six times longer than broad, its fore side hardly angular.