_Male._ Golden green. Face and pectus silvery; antennae black, arista longer than the thorax; thorax with three broad reddish cupreous stripes; abdomen with broad cupreous purple bands; femora lutescent, tibiae piceous, fore femora blackish towards the tips, tarsi black; wings black, tips snow-white, fore branch of the praebrachial vein slightly curved inward, discal transverse vein much curved outward; halteres tawny, with black tips. Length of the body 4-1/2 lines; of the wings 9 lines. 57. Psilopus flavicornis, _Wied. Auss. Zweifl._ 11. 227. 31. Inhabits also Sumatra. 58. PSILOPUS TERMINIFER, n. s. _Mas._ Aureo-viridis, vertice cyaneo-purpureo, facie pectoreque argenteis, antennis, pedibus halteribusque testaceis, abdomine apicem versus atro fasciis duabus cupreis, alis subcinereis apice nigris. _Male._ Golden-green, slender. Vertex bluish-purple; face and pectus silvery; antennae testaceous, arista about half the length of the body; fourth and fifth segments of the abdomen deep black with a cupreous band on the hind border of each segment, tip blue; legs and halteres testaceous; wings greyish, paler along the hind border, tips black, fore branch of the praebrachial vein slightly curved inward, discal transverse vein slightly undulating. Length of the body 3 lines; of the wings 5 lines. 59. PSILOPUS ORCIFER, n. s. _Foem._ Purpureus, facie pectoreque subcinereis, antennis, pedibus halteribusque nigris, abdomine cyaneo-viridi segmentorum marginibus posticis purpureis, alis nigricantibus margine postico cinereo. _Var._ Viridis, vertice cyaneo, abdominis segmentis basi nigris. _Female._ Purple, rather stout. Face and pectus slightly cinereous; antennae, legs, and halteres black; abdomen bluish-green, hind borders of the segments purple; wings blackish, cinereous along the hind border, fore branch of the praebrachial vein forming an obtuse angle, discal transverse vein very undulating. _Var._ Green. Vertex blue; abdominal segments black at the base. Length of the body 2-1/2 lines; of the wings 5 lines. 60. PSILOPUS EGENS, n. s. _Mas et Foem._ Purpureus, facie pectoreque cyaneo-viridi cinereo subtomentosis, antennis, pedibus halteribusque nigris, metathorace viridi, abdomine cyaneo, suturis nigris, alis cinereis. _Male and Female._ Purple. Face and pectus slightly covered with cinereous tomentum, the latter bluish-green; antennae black, arista much more than half the length of the body; metathorax green; abdomen blue, sutures black; legs and halteres black; wings grey, fore branch of the praebrachial vein much curved inward, discal transverse vein straight; length of the body 2-1/2--2-3/4 lines; of the wings 5 lines. Gen. DOLICHOPUS, _Latr._ 61. DOLICHOPUS TRIGONIFER, n. s. _Foem._ Cupreo-viridis, facie argentea, antennis, pedibus halteribusque testaceis, pectore, ventre abdominisque maculis lateralibus trigonis albidis, abdomine purpureo marginibus posticis nigris, tarsis posterioribus nigricantibus, alis cinereis.