_Male and Female._ Black, long, slender; head bluish-black, white about the eyes in front; antennæ of the male piceous, of the female tawny, 3rd joint round, arista minutely pubescent; thorax with four cinereous stripes; abdomen about twice the length of the thorax, cylindrical towards the base, subclavate in the male and elongate-fusiform in the female hindward; hind borders of the segments white on each side; fore femora, hind tibiæ and hind tarsi tawny at the base; middle legs and hind femora tawny, the latter with a broad black band; fore tibiæ white, black at the base; wings grey; veins black; discal transverse vein straight, upright, parted by less than its length from the border, and by almost four times its length from the præbrachial transverse; halteres testaceous. Length of the body 4-4-1/2 lines; of the wings 6-7 lines. Gen. GOBRYA, n. g. _Mas. Corpus_ gracillimum. _Caput_ thorace multo latius; frons sat angusta; facies plana. _Oculi_ magni. _Antennæ_ brevissimæ; articulus 3^{us} conicus; arista pubescens. _Thorax_ sat parvus. _Abdomen_ cylindricum, gracillimum, apice clavatum, thorace duplo longius. _Pedes_ graciles; anteriores breves; postici longiusculi. _Alæ_ perangustæ. _Male._ Body very slender. Head much broader than the thorax; front rather narrow; face vertical, flat; eyes large, prominent. Antennæ very short; 3rd joint conical, longer than the 2nd; arista pubescent. Thorax rather small. Abdomen clavate, about twice the length of the thorax, cylindrical and very slender till near its tip. Legs slender; anterior legs short; hind legs rather long. Wings very narrow; discal transverse vein straight, upright, parted by more than its length from the border, and by more than four times its length from the præbrachial transverse. 221. GOBRYA BACCHOIDES, n. s. _Mas._ Cyanea, nitens, antennis pedibusque pallide flavis, abdomine nigro fasciis duabus flavis, femoribus posterioribus tibiisque posticis nigris, tarsis posticis basi nigris, alis vix cinerascentibus, halteribus flavis apice nigris. _Male._ Blue, shining; proboscis, antennæ, and legs pale yellow; abdomen black, with two pale yellow bands, the hind one very slender; posterior femora and hind tibiæ black, the former pale yellow at both ends; middle tibiæ and tarsi wanting; hind tarsi black towards the base; wings hardly greyish, apical third part brown; veins black; halteres pale yellow, with black knobs. Length of the body 2-3/4 lines; of the wings 4 lines. Subfam. OSCINIDES, _Haliday_. Gen. OSCINIS, _Fabr._ 222. OSCINIS FEMORATA, n. s. _Mas._ Atra, nitens, capite nigro-cyaneo, femoribus anterioribus basi, tibiis anterioribus apice, tarsis halteribusque flavis, femoribus posticis incrassatis, alis cinerascentibus.