Dexia violovitshi Kolomiets, 1970

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 : 77

Dexia violovitshi Kolomiets, 1970

Dexia (Dexillina) violovitshi Kolomiets, 1970: 71 . — Mesnil 1980: 50 (redescription). — Herting 1984: 144 (catalog). — Herting & Dely-Draskovits 1993: 367 (catalog).

Diagnosis. Body length. 8.5−10.5 mm. Frons 1/3 eye width in male, as wide as in female; gena about 1/2 of eye height; antenna yellow, 1st flagellomere 2−2.5 times as long as pedicel; thorax with grayish yellow pruinosity, 4 longitudinal black vittae, inner vittae narrow; 1−2 presutural and 1−2 postsutural acrostichal setae; prosternum narrow, 3−4 times as long as wide; proepisternum bare; 3 presutural and 3 postsutural dorsocentral setae; 2 katepisternal setae; costal spine developed; lower calypter with short fringe; legs reddish yellow; abdomen broadly yellowish, mid dorsal longitudinal area rather narrowly black on syntergite 1+2 to tergite 4, and on median and apical transverse areas of tergite 5; abdominal tergite 3 with 1 pair of median marginal setae, tergites 3 and 4 each with 1−2 pairs of median discal setae.

Type material. Holotype male of Dexia violovitshi Kolomiets , Tuva , south of Sajan Mountains, Tshadan, Mongolia, 9.vii.1950 ( ZIN) (not examined).

Distribution. Mongolia, Russia (West Siberia).

Remarks. Kolomiets (1970) described this species from Mongolia and later Mesnil (1980) redescribed it in detail. As we were unable to see this species, the characters mentioned above were taken from Kolomiets (1970) and Mesnil (1980). The date of collection of the holotype is different in the Russian description and English summary; we cited the former one here.

This species appears to resemble D. flavipes , but may be distinguished from it in having very narrow prosternum, and 1st flagellomere as long as palpus and 2.0−2.5 times as long as pedicel.