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alteres white. Length of the body 4 lines; of the wings 8 lines. Gen. HELOPHILUS, _Meigen._ 74. Helophilus quadrivittatus, _Wied. Auss. Zweifl._ 11. 168. 22. (Eristalis). Inhabits also Hindostan. 75. HELOPHILUS MESOLEUCUS, n. s. _Foem._ Niger, faciei lateribus niveo tomentosis, thorace vittis quatuor canis, scutello, abdominis fascia antica latissima interrupta basique lutescentibus, alis cinereis, venis basi halteribusque fulvis. _Female._ Black. Face with snow-white tomentum on each side; thorax with four hoary stripes; pectus with a cinereous disk; scutellum pale luteous; abdomen pale luteous at the base, and with a broad interrupted pale luteous band on the second segment, third and fourth segments somewhat chalybeous, the former livid along the fore border, under side with two lateral abbreviated pale luteous stripes; hind femora thick; wings grey, veins towards the base, and halteres, tawny. Length of the body 6-1/2 lines; of the wings 12 lines. Gen. XYLOTA, _Meigen._ 76. XYLOTA VENTRALIS, n. s. _Foem._ Nigro-chalybea, capite albido tomentoso, scutello fulvo, vittis duabus ventralibus latis abbreviatis testaceis, pedibus piceo et testaceo variis, alis fuscis basi cinereis, halteribus testaceis. _Female._ Blackish chalybeous. Head with whitish tomentum, excepting the callus on the vertex and another on the front; mouth and antennae black; scutellum tawny; abdomen beneath with two very broad testaceous stripes extending from the base to two-thirds of the length; legs dingy testaceous, femora and hind tibiae partly piceous, hind femora thick, piceous, slightly chalybeous, armed with spines beneath; wings dark brown, cinereous towards the base; halteres testaceous. Length of the body 4-1/2 lines; of the wings 8 lines. Gen. ORTHONEURA, _Macq._ 77. ORTHONEURA BASALIS, n. s. _Foem._ Chalybeo-nigra, nitens, cano-subtomentosa, antennis ferrugineis basi fulvis articulo tertio elongato, tarsis posterioribus piceis, tarsis anticis tibiisque anterioribus fulvis, his nigro fasciatis, alis subcinereis fusco fasciatis, halteribus testaceis. _Female._ Chalybeous-black, very shining, partly and slightly covered with hoary tomentum; antennae tawny, third joint ferruginous, long, linear, tawny at the base; anterior tibiae tawny with a black band, fore tarsi tawny, hinder tarsi piceous; wings greyish, with a subapical brown band which is abbreviated hindward, veins towards the base and halteres testaceous; a
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