Tethina stukei Munari, 2010

Munari, Lorenzo, 2016, The Canacidae of the Arabian Peninsula (Diptera: Brachycera: Carnoidea), Zootaxa 4092 (4), pp. 489-517 : 508

Tethina stukei Munari, 2010

(figs. 38‒40)

Tethina stukei Munari, 2010: 655 [ United Arab Emirates. Umm al Qaywayn, beach, 25°31.46’ N, 055°31.53’ E; HT ♂, NMWC].

Distribution. Afrotropical: United Arab Emirates.

Diagnosis. Similar to T. pleuralis , agreeing with the diagnosis of that species, except as indicated below. Body length 1.61−3.78 mm; small fly with bicoloured head (grey-whitish yellow) and abdomen (yellow-brown); thorax uniformly grey; setal vestiture of head and thorax mostly dark brown (particularly in male); scutellar spot black, with well definite outline (fig. 38); Head with grey vertex and occiput; 4 pairs of interfrontal setae; antenna yellow, arista infuscated on the apical half; eye oblique, elliptic, its longest diameter 1.75–2.87 times as long as the height of the gena; gena whitish, with broad, longitudinal, subshiny stripe; proboscis with labella distinctly shorter than the length of the buccal cavity; acrostichal setulae very scarce, inconspicuous, often arranged in a single row; acrostichal prescutellars lacking; intra-alar setulae scarce; posterior third of scutum generally without setulae; legs entirely pale yellow, only the apical tarsomere strongly infuscated; wing weakly infuscated on the entire anterior half; black macula on the dorsal base of vein R1; crossveins depigmented, without milky halo; syntergite 1+2 broadly yellowish; male terminalia with surstylus distinctly sinuous in lateral view (fig. 39), bearing a wide, mesal lobe (fig. 40); distal portion of surstylus lobe-shaped in posterior view (fig. 40).