13. GABAZA ARGENTEA, n. s. _Foem._ Nigra, antennis fulvis, arista alba, thorace abdomineque argenteo-tomentosis, tarsis albido-testaceis, alis limpidis, venis pallidis. _Female._ Coal-black. Antennae tawny, arista white; thorax and abdomen with bright silvery tomentum; tarsi whitish testaceous; wings limpid, veins pale. Length of the body 2 lines; of the wings 3-1/2 lines. Gen. SARGUS, _Fabr._ 14. Sargus metallinus, _Fabr._ See Vol. I. p. 110. 15. SARGUS COMPLENS, n. s. _Foem._ Rufescente-fulvus, capitis vertice nigro, antennis testaceis, abdomine fasciis latis abbreviatis piceis, tarsis posticis basi tibiisque posticis nigris, alis cinereis, basi subluridis, apud costam exteriorem nigro-fuscis. _Female._ Reddish tawny. Head black above, testaceous beneath; antennae testaceous; abdomen with four broad abbreviated piceous bands; legs tawny, hind tibiae black with a tawny apical mark, hind tarsi black towards the base; wings greyish, slightly lurid towards the base, blackish-brown about the exterior part of the costa, veins black, tawny towards the base; halteres testaceous, tawny towards the tips. Length of the body 6 lines; of the wings 14 lines. 16. SARGUS ROGANS, n. s. _Mas et Foem._ Capitis vertice nigro, antennis pedibusque testaceis, tibiis tarsisque posticis nigris, alis subcinereis apice obscurioribus. _Mas._ Luteo-testaceus. _Foem._ Ferrugineus. _Male and Female._ Head black above; antennae and legs testaceous; hind tibiae and hind tarsi black; wings greyish, darker towards their tips; veins black, tawny towards the base. _Male._ Lutescent testaceous. _Female._ Ferruginous; wings darker than those of the male. Length of the body 5 lines; of the wings 10 lines. Gen. NERUA, n. g. _Foem. Corpus_ longiusculum, sublineare. _Caput_ transversum, thorace non latius. _Antennae_ breves; articulus tertius rotundus; arista apicalis, longa, tenuis, setiformis. _Thorax_ productus. _Scutellum_ spinis quatuor longiusculis. _Abdomen_ depressum, sublineare, thorace vix latius, non longius. _Pedes_ graciles, non longi. _Alae_ angustae; venae bene determinatae. _Female._ Body rather long, nearly linear. Head transverse, not broader than the thorax. Antennae short; third joint round; arista apical, long, slender, setiform. Thorax long. Abdomen flat, thin, nearly linear, hardly broader and not longer than the thorax. Legs slender, not long. Wings narrow; veins distinctly marked, in structure like those of _Clitellaria_. This genus may be distinguished from _Culcua_ by the shape of the abdomen. 17. NERUA SCENOPINOIDES, n. s. _Foem._ Atra, nitens, antennis fulvis, scutelli spinis pedibusque albis, alis nigro-cinereis, postice pallidioribus, venis nigris, halteribus testaceis. _Female._ Coal-black, shining; antennae tawny; thorax slightly tomentose; spines of the scutellum and legs white; wings blackish grey, paler towards the hind border, veins black; halteres testaceous. Length of the body 3 lines; of the wings 5 lines. Gen. ADRAGA, n. g.