Dexia seticincta Mesnil, 1980

Zhang, Chun-Tian, Shima, Hiroshi & Chen, Xiao-Lin, 2010, A review of the genus Dexia Meigen in the Palearctic and Oriental Regions (Diptera: Tachinidae) 2705, Zootaxa 2705, pp. 1-81 : 61-62

Dexia seticincta Mesnil, 1980

Dexia (Eomyocera) seticincta Mesnil, 1980: 46 . — Herting 1984: 144 (catalog). — Shima 1989: 869 (list). — Herting & Dely-Draskovits 1993: 366 (catalog).

Diagnosis. Thorax with 4 narrow longitudianl vittae on dorsum; 3 presutural and 4 postsutural dorsocentral setae; lower calypter with long fringe; legs reddish yellow; abdominal tergite 3 with a complete row of marginal setae.

Description. Mesnil (1980) described this species in detail. Here are added some diagnostic characters.

Body length. Male: 9.0 mm.

Male. Head. Frons about 0.15 times as wide as head width; parafacial about twice as wide as 1st flagellomere at middle height; gena about 0.47 times as wide as eye height. Inner vertical seta about 3/8 as long as eye height; ocellar seta more than 1/2 eye height. 1st flagellomere about 5 times as long as pedicel; palpus slightly longer than 1st flagellomere. Thorax black in ground color, with 4 longitudinal black vittae, inner vitta about 1/5 as wide as pruinose portion between inner and outer vittae on presutural scutum. Proepisternum bare; 3 postpronotal setae; 2 presutural and 1 postsutural acrostichal setae; 3 presutural and 4 postsutural dorsocentral setae; 2 postsutural intra-alar setae; 2 supra-alar setae; 2 katepisternal setae; scutellum with 4 pairs of marginal setae. Wing hyaline; tegula and basicosta pale reddish brown. Costal spine about as long as r-m crossvein; relative lengths of 2nd, 3rd and 4th costal sectors approximately 2:4.5:2.5; vein M from dm-cu crossvein to its bend about twice distance between the bend and wing margin. Lower calypter with long fringe on outer margin. Legs reddish yellow. Mid tibia with 2 posterodorsal setae; hind tibia with 3 anterodorsal, 2 posterodorsal and 1 ventral setae. Abdomen broadly reddish yellow on sides of tergites 2 to 4, narrowly reddish brown on sides of tergite 5, broadly blackish on median longitudinal portion of tergites 2 to 4 and posterior 1/2 of tergite 4 and entire tergite 5; anterior 1/3 of tergite 3 and anterior 1/2 of tergites 4 and 5 with rather dense white pruinosity. Syntergite 1+2 with several lateral discal and 2−3 lateral marginal setae, without median marginal setae; tergite 3 with 2 pairs of median discal, 1−2 lateral discal and a row of marginal setae; tergite 4 with 2 anterior and an irregular row of 6 posterior discal setae and a row of marginal setae; tergite 5 with an irregular row of discal setae and a row of strong marginal setae.

Type material examined. Holotype male of Dexia seticincta Mesnil , JAPAN, Tokyo, Tanashinojo , 20.v.1951, I. Hattori ( CNC).

Distribution. Japan (Honshu).

Remarks. This species is similar to D. ventralis , but is distinguished from it in having 3 presutural and 4 postsutural dorsocentral setae, and abdominal tergite 3 with a complete row of marginal setae.