A new record of the hoverfly genus Dasysyrphus Enderlein, 1938 (Insecta: Diptera: Syrphidae) from India

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Journal of Threatened
Syrphid flies were collected from the field during daytime by using insect sweep nets, malaise trap, and pan traps. The collected samples were narcotized by using ethyl-acetate and stored for further study in insect envelopes in the field. The specimens were later carried back to the laboratory, mounted with insect pins and stored in insect cabinets.
Identification of the fly specimens was done using the keys of Brunetti (1923), Vockeroth (1992 and Thomson (2013) keeping in mind the recent nomenclatural changes (Pape & Evenhuis 2018) . After identification, the specimens were deposited in the designated repository of national zoological collection, Diptera section, Zoological Survey of India, Kolkata.
The 3D maps used here were generated using ARC GIS software Version 10.1. The photograph of habitus and insect body and parts were taken by using Leica Microscope M205A, where 0.32x Acrolense was used for habitus photography and PLANAPO 1.0X lense was used for the photography of body parts.

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Systematic Account Subfamily Syrphinae Tribe Syrphini Genus Dasysyrphus Enderlein, 19381938. Dasysyrphus Enderlein, Sber. Ges. Naturf. Freunde Berl. 1937 The genera Dasysyrphus is described by Enderlein in the year 1938. He has described the genera based on the taxonomic characters of the species Scaeva albostriata.
Diagnosis: Frons black with purinose areas, face slightly broadened with distinct median stripe. Scutellum dull yellow to brown in colour. Ventral scutellar fringe well developed. Upper and lower katepisternal patches narrowly to broadly join posteriorly. Abdomen narrowly to broadly oval and convex. Sternites yellow with distinct black bands. Wing membrane entirely trichose (McAlpine et al. 1981) Key to species of the genus Dasysyrphus Enderlein, 1938.  Type location: Sweden, Scania. This species is thus the first record from India as well as from the oriental region.
Diagnosis: Presence of large shinning black antennal prominence; distinct black median stripe enclosing the central bump. Occiput grey with yellowish-white uninterrupted fringe. Dorsum of thorax consists of black conspicuous stripes. Pleurae shinning dark grey, scutellum brownish-yellow in color with wholly long black pubescence. Abdominal tergites distinct. Moderate sized yellow oval spot on 2 nd segment while sinuate narrow yellow band of uniform length on 3 rd and 4 th segment. Basal half of anterior and hind femora and Remarks: Dasysyrphus albostriatus has been reported feeding on larvae of Lepidoptera (Krpač et al. 2009). Adults are also known as beneficial pollinator (Laska et al. 2013). Therefore, both the larvae as well as adults are economically important from agricultural viewpoint.
Discussion: Hoverfly research in India is quite J TT enriched with a research history over the past 110 years.
The research on Indian hoverflies has always preferred the taxonomic aspect during pre-independence era (Fabricius 1805;Brunetti 1923;Bhatia & Shaffi 1933) whereas in post-independence period, the research interest has been shifted more towards economic and agricultural aspects (Coe 1964;Nayar 1968;Hippa 1974;Biswas et al. 1975;Kohli et al. 1988). During the last decade research has focused on both taxonomy as well as the field of agricultural, ecological and economical studies (Mitra & Parui 2002, 2012Mukherjee et al. 2006Mukherjee et al. , 2007Parui et al. 2006;Ghorpade 2007Ghorpade , 2009Ghorpade , 2012Ghorpade , 2014