184 



Length : 11-13 mm. 



Male. Similar to the female, but the abdomen more fulvus and 

 its dorsal median stripe less broad and only two apical segments black- 

 ish. Head conspicuously broader than the thorax and forming just a 

 semicircle anteriorly (when seen from above) with the hindmargin 

 slightly concave, and always longer and usually wider than in the 

 female. Face and side-cheeks whitish yellow with a very faint tinge 

 of greenish grey, bearing fine short (but longer and denser than in the 

 female) whitish yellow pubescence ; back of the head greyish yellow or 

 pale yellow and deeply hollowed out behind the eyes, and with only 

 a microscopical greyish yellow postocular fringe which however grows 

 slightly longer on the upper part ; ocellar space exceedingly small, dull 

 yellow, and on its back part some short pale brownish pubescence ; 

 frontal triangle rather small, whitish yellow with a grey tinge, and 

 depressed on the middle part at where there is an inconspicuous median 

 sulcus. Palpi pale whitish yellow ; second joint elongate elliptical, hardly 

 pointed, bearing a few short black bristles on the outside and some 

 longer ones towards the tip as well as numerous long whitish hairs 

 above and (conspicuously so) beneath about the base ; basal joint about 

 half as long as the apical one, usually darker, and bearing long whitish 

 hairs. Antennae usually paler and slender than in the female; basal 

 annulation of the third joint narrow and with a short dorsal hump near 

 the base. Eyes clothed with short dense pale grey pubescence, touch- 

 ing from the very small vertex for fully two-thirds of the distance to 

 the antennae ; facets on the upper and middle parts much larger than 

 those on the rest, so that the small facets extend over the lower 

 third of the front and very narrow outer puts and continue as a zone 

 (about same in width throughout) all round the hindmargin up to the 

 vertex ; the dividing line of the facets somewhat sharply defined. 



Thorax and scutellum as in the female, but the pubescence much 

 longer and softer and intermixed with very few long blackish hairs 

 especially on the scutellum. Pleurae more greyish, clothed with dense 



