87. MUSCA DIFFIDENS, n. s. (genus Pyrellia, _Desv._), fœm. Cyaneo-viridis, capite albido, palpis antennis pedibusque nigris, alis vix cinerascentibus. _Female._ Bright bluish-green. Head whitish. Proboscis, palpi, antennæ and legs black. Wings hardly greyish; veins black; præbrachial vein gently curved at its flexure, from whence it is almost straight to its tip; discal transverse vein almost straight, parted by much less than its length from the border, and by much more than its length from the curve of the præbrachial vein. Alulæ whitish. Length of the body 3 lines; of the wings 6 lines. Singapore. 88. MUSCA CONFIXA, n. s. (genus Pyrellia, _Desv._), fœm. Lætè viridis cyaneo purpureoque varia, capite nigro, antice albido, palpis testaceis, antennis nigris basi rufescentibus, abdominis apice subæneo, pedibus nigris, alis cinereis. _Female._ Bright green, tinged with blue and purple along each side. Head black above, whitish in front. Proboscis black. Palpi testaceous. Antennæ black; first and second joints reddish. Abdomen slightly æneous at the tip. Legs black; femora green. Wings grey; veins black; præbrachial vein gently curved at its flexure, between which and its tip it is slightly curved inward, discal transverse vein moderately undulating, parted by much less than its length from the border, and by a little less than its length from the flexure of the præbrachial vein. Alulæ dark grey. Length of the body 3½ lines; of the wings 7 lines. Mount Ophir, at the height of 4000 feet. 89. MUSCA REFIXA, n. s. (genus Pyrellia, _Desv._), fœm. Purpurea, lateribus subtùsque cyanea aut cyaneo-viridis, capite antico, palpis pedibusque nigris, antennarum articulo tertio piceo, alis subcinereis. _Female._ Purple shining, blue on each side and beneath. Head in front, proboscis, palpi and legs black. Third joint of the antennæ piceous. Wings slightly greyish; veins black; præbrachial vein forming a gentle curve at its flexure, which is very near the border, indistinctly curved outward from thence to its tip; discal transverse vein almost straight, parted by little more than half its length from the border, and by about its length from the flexure of the præbrachial vein. Alulæ grey. Length of the body 2½–2¾ lines; of the wings 5–5½ lines. _Var._ β. Bluish-green. Scutellum purplish-blue. Discal transverse vein very indistinctly curved inward. Singapore. 90. MUSCA PERFIXA, n. s. (genus Pyrellia, _Desv._), fœm. Purpurea, capite palpis antennis pedibusque nigris, alis limpidis.