The Canacidae of the Arabian Peninsula (Diptera: Brachycera: Carnoidea) Author Munari, Lorenzo text Zootaxa 2016 4092 4 489 517 journal article 51564 10.11646/zootaxa.4092.4.2 eb2da56d-dd6b-4acb-a9fe-8d1addb01cb9 1175-5326 264498 E6C06D83-2B9C-44DE-A085-490E3240258A Tethina longilabella Munari, 2007 (figs. 24‒26) Tethina longilabella Munari 2007: 107 [ Oman . Ra’s al Ghubbah ( 20°07'N , 57°49'E ; at light); HT ♂, NMWC]. FIGURES 24‒26. Tethina longilabella Munari : 24—scutellum in dorsal view (schematic drawing); 25—male terminalia in lateral view; 26—ditto, posterior view. Scale bar = 0.1 mm (figs. 25‒26) (modified after Munari, 2007). Distribution. Afrotropical : Oman . Diagnosis. Body length 1.6‒2.1 mm ; pale yellow species with grey mesonotum; scutellum with brown spot (fig. 24); setal vestiture pale, golden yellowish to whitish; wings with pale yellow membrane and veins. Head distinctly subtriangular, about as long as high; ventral face protrudent as in Tethina illota (Haliday, 1838) ; eye oblique, markedly oblong, its longest diameter 2.9 times as long as genal height; gena yellow, with weak trace of translucent, longitudinal band; mouth parts with labella very long and narrow, much longer than the length of the buccal cavity; palpus very long and narrow; thorax yellowish grey, mesonotum distinctly darker; 3-4 rows of acrostichal setulae on the anterior half of the scutum; prescutellar acrostichals moderately long; both proepisternal and proepimeral setae present; legs pale yellow, with apical tarsomere of mid and hind legs more or less infuscated; crossveins of wing without any trace of white halo; perianal area of epandrium with two distinct patches of micropapillae bearing microtrichia (fig. 26); surstylus long, narrow, bent forward on the distal half (lateral view), large and with broad mesal lobe in posterior view (figs. 25‒26).