Tabanus dorsiger Wiedemann, 1821

Maity, Aniruddha, Naskar, Atanu, Homechaudhuri, Sumit & Banerjee, Dhriti, 2020, Taxonomic Accounts With Notes On Spatial Diversity And Relative Abundance Pattern Of Horseflies (Diptera: Tabanidae) From Sonamukhi Protected Forest Area Of West Bengal, India, Munis Entomology & Zoology 15 (1), pp. 200-225 : 211

3. Tabanus dorsiger Wiedemann, 1821

1821. Tabanus dorsiger . Wiedemann, Diptera Exotica, Kiliae , pp. 43-50, 101.

Type locality: Indian subcontinent.

Material examined: 2♀♀, collected from cow, 23°13'25.65"N, 87°13'46.55"E, 93.7 m, Station 4, Bankura , 27.ix.2013, Coll. A. Maity ; 1♀, collected from cow, 23°18'31.42"N, 87°18'14.02"E, 85.9 m, Station 5, Bankura , 17.ix.2014, Coll. A. Maity ; 1♀, collected from cow, 23°14'33.50"N, 87°21'20.85"E, 91 m, Station 6, Bankura , 21.iii.2015, Coll. A. Maity .

Diagnosis: Adult fly is usually larger (14–16 mm in length) than the other two trivittate flies, T. striatus and T. tenens . Fore head slightly divergent above, frontal callus narrowly separated from eye margins and median callus spindle shaped and narrowly joined to dorsal extension of frontal callus. Abdomen trivittate, mid dorsal stripe complete and broad on tergum II, sub lateral pale stripes noticeably step-like; venter uniform with grey tomentum and light pilose. Fore femur and fore tibia are uniformly orange to orangy brown in colour but are darkened apically. Thoracic stripes are distinct. The male has a yellow tinted costal cell on the wing.

Distribution: India (West Bengal: Bankura, East Midnapre, Hooghly, S 24 Paragana; Orissa).

Elsewhere: Mexico to Argentina, Trinidad.

Remarks: This species is previously known to us as Tabanus triceps Thunberg, 1827 , later the species was synonymised under Tabanus dorsiger Wiedemann, 1821 due to basically same character of callus in fore head and abdominal pattern with sub lateral stripes step like in both species. This species is recorded for the first time from the state of West Bengal.