Ghilosia. 145 



Male. Eyes bare. Frons black, shining, with a longitudinal groove; 

 vertex and frons black-haired. Epistoma a little less retracted below 

 than in the two preceding species, but not prominent; the front margin 

 of the oral aperture less deeply curved; epistoma slightly hoUowed 

 below the antennæ, the central knob broad 

 but less broad than in the two preceding, 

 pointed and with a sloping upper outline, 

 so that the apex lies somewhat downwards, 

 below it the epistoma is distinctly hollowed 

 and the mouth edge somewhat prominent; 

 the epistoma is narrowly pruinose below the 

 antennæ, for the rest almost not pruinose, 

 shining; it is slightly descending. Eye- 

 margins very narrow, greyish pruinose, with 

 pale hairs. Occiput greyish pruinose, with 

 pale hairs below, black above. Antennæ 

 black or blackish brown, third joint slightly ^ig. 69. Head of C. longula c?. 

 or almost not longer than broad; arista 



distinctly pubescent. Thorax black or æneous black, finely punctate, 

 shining; it is clothed with longish, erect, black hairs, on scutellum 

 intermingled with yellow hairs; notopleural, postalar and scutellar 

 marginal bristles distinct and somewhat long, supraalar bristles less 

 distinct. Pleura with longish, black hairs. Abdomen black or æneous 

 black, second segment quite dull, the third with a shining space on 

 each side towards the front margin; pubescence somewhat long, erect, 

 pale yellow, it is shorter in the middle and here with some dark 

 hairs, especially behind and at the apex, and on the slightly pruinose 

 genitalia are black hairs ; at the sides in the basal half the pubescence 

 is rather long. Venter black, shining, with longish, pale hairs. Legs 

 black, the knees more or less narrowly yellow, but the base of tibiæ 

 generally more broadly; the extreme apex of tibiæ likewise yellow; 

 tarsi black or blackish, the anterior, especially the middle tarsi may 

 be indistinctly pale at the base. Legs with the short "hairs raainly 

 black, the long hairs on femora chiefly pale but black behind the 

 front femora and also partly on the middle femora ; the black splnula- 

 tion below the hind femora rather fine ; hind metatarsi slightly thickened. 

 Wings yellowish tinged, towards the anterior margin more light brownish; 

 upper angle at the upper marginal cross-vein somewhat acute. Squamulæ 

 dirty yellowish or light brownish, with a yellow or pale brownish 

 fringe. Halteres yellowish orange. 



Female. Frons not narrow, without channels, bluish black, shining, 

 above the antennæ a small, somewhat indistinct dust spot at each 



10 



