5 times as long as wide, sides curved, dorsal surface smooth; prosternal surface smooth, 3 setae (l elongate) at anterolateral angles and 2 short setae at posterolateral angles; prosternum trapezoidal, sides oblique, posterior margin straight, a pair of medial setae present posterior to posterior margin of presternum
Palpus not enlarged, narrow; parafacial bare; presternum setulose or, if bare, base of vein [R.
25* as wide as high; arista plumose only on dorsal surface; palpus spatulate, slightly narrowed in basal 1/4 to 1/2 reaching tip of haustellum when proboscis flexed; presternum setulose; proepisternal depression and postalar wall bare; prealar seta differentiated or vestigial; lower calypter ca 2x as long as upper calypter.
and mesopleuron lacking setae or setulae, except 2 strong katepisternal setae along upper edge.
Diagnosis: Species of Pyrgotomyia can be recognized from the other Old World Pyrgotini by a combination of the following: face oblique, concave without medial carina; gena with large subocular sclerite; palp short oval; lateral vertical seta lacking; presternum simple saddle-like, without finger-like lobes; mesonotum with 4-6 dorsocentral setae (including 1 or 2 presutural), 2 pairs of scutellar setae; wing narrow with dorsal surface of vein [R.
1 x as long as numerous (8-10) strong irregular seta-like setulae in anterior portion of frons; 1 medial vertical as long as flagellomere 1, lateral vertical seta lacking or indistinguishable from postocular and occipital setulae; presternum simple saddle-like without projected lobes, with 2-4 pairs of fine setulae; postpronotal lobe with 10-14 setulae and 0-1 seta; proepimeron slender, with 2-5 tiny setulae; mesonotum shining or subshining, non-microtrichose, sparsely and short setulose on sides, with 1-7 moderately long presutural and 2-4 postsutural setulae or setae forming regular row; presutural supra-alar and prescutellar acrostichal setae absent; scutellum with 2 pairs of setae; 1 anepisternal, 1 anepimeral and 1 katepisternal seta; wing moderately narrow, 2.
whitish yellow, with 2 or 3 pairs of pale brown setulae; mesonotum entirely yellowish orange, with 1 + 4 dorsocentral setae, not arising from dark spots; proepisternum with sparse brown setulae scattered across surface; pleural part of thorax yellowish orange, with thin lateral dark brown fascia running from anterior part of postpronotum to wing base; postpronotum, notopleural area, anepisternum and meron pale orange; katepisternum with 1 strong black seta and some smaller setulae; anepisternum and anepimeron glabrous; meron bearing a few brown setulae at posterodorsal corner; scutellum and postscutellum yellowish orange; scutellum slightly elongate and pointed apically, with >20 small blackish setulae at lateral margin (Fig.