_Male._ Blue, slender, cylindrical. Head broader than the thorax; antennae whitish, third joint piceous, arista plumose; abdomen piceous, slightly increasing in breadth to the tip, blue at the base and at the tip, hind borders of the first and second segments whitish; legs whitish, posterior femora black, whitish at the base and towards the tips, hind femora spinose beneath, hind tibiae black; wings slightly greyish, brownish towards the tips; veins black, praebrachial and perbrachial very near together for more than half their length, discal transverse vein straight, parted by more than its length, and by about four times its length from the praebrachial transverse; halteres whitish, with black tips. Length of the body 3-1/2 lines; of the wings 5 lines. Gen. NERIUS, _Fabr._ 159. Nerius duplicatus, _Wied. Auss. Zweifl._ 11. 553. 8. Inhabits also Java. Subfam. OSCINIDES, _Haliday_. Gen. OSCINIS, _Fabr._ 160. OSCINIS LINEIPLENA, n. s. _Mas._ Fusca; capite subtus testaceo apud oculos albo, vitta frontali alba; thorace pectoreque lineis sex albidis; abdomine sordide testaceo, pedibus albidis, tibiis tarsisque apice femoribusque anticis nigris; alis subcinereis, halteribus albidis. _Male._ Brown. Head testaceous in front and beneath, white about the eyes, with a white stripe on the front; thorax and pectus with six whitish stripes on each, thorax with an indistinct middle testaceous stripe; abdomen dull testaceous; legs whitish; tibiae and tarsi at the tips and fore femora black; wings greyish; veins black, discal transverse vein oblique, parted by more than its length from the border, and by full twice its length from the praebrachial transverse; halteres whitish. Length of the body 2 lines; of the wings 3 lines. 161. OSCINIS NOCTILUX, n. s. _Mas._ Atra; capite pallide flavo subtus albo; antennis luteis, arista nuda; scutello, maculis duabus pectoralibus abdominisque apice albis; tibiis tarsisque intermediis testaceis; alis nigricantibus postice cinereis, halteribus niveis. _Male._ Black. Head pale yellow, black hindward, white beneath; antennae pale luteous, third joint very short, arista bare; scutellum white; pectus with a white spot on each side; abdomen white at the tip; middle legs with testaceous tibiae and tarsi; hind wings blackish, cinereous hindward; halteres snow-white. Length of the body 3/4 line; of the wings 1-1/2 line. Subfam. GEOMYZIDES, _Fallen_. Gen. DROSOPHILA, _Fallen_. 162. DROSOPHILA? FINIGUTTA, n. s. _Mas._ Fulva; capite antice testaceo, antennis testaceis, articulo tertio conico; abdomine maculis quatuor apicalibus nigris, tarsis nigris; alis cinereis venis nigris.