Ghilosia. 171 



bristles, Pleura witli longish, pale and above some black hairs. Ab- 

 domen æneous black, shining, second segment duU on the whole disc 

 and the third with a more or less hour-glass-shaped dull patch; ab- 

 domen clothed with rather long, erect, yel- 

 low hairs, shorter on the middle ; they are 

 palest at the base, black at the hind mar- 

 gins of third and fourth segments, on the 

 latter at all events at the hind corners. 

 Venter somewhat pruinose, with long, pale 

 hairs. Legs with femora black, the anterior 

 narrowly reddish at the end, tibiæ more 

 or less obscurely reddish with a broad, 

 black ring below the middle, broadest on 

 hind tibiæ, which are only a little reddish 

 at base and slightly at apex; tarsi black. 



The hairs on femora black behind front !f ' • ' . ^*^ ° 



(:. gigantea <S. 

 femora, for the rest whitish, on tibiæ mainly 



dark except the usual golden pubescence below front and hind tibiæ; 



all tibiæ somewhat distinctly fringed above; hind femora black-setulose 



beneath only on the apical half; hind metatarsi not or almost not 



thickened. Wings somewhat strongly brownish tinged, especially to- 



wards the anterior margin ; upper marginal cross-vein a little curved 



above, the upper angle about rectangular. Squamulæ yellowish white 



with yellow margin and fringe. Balteres yellow, the knob more or 



less darkened. 



Female. Frons of medium breadth, widening downwards, trisul- 



cate, the middle channel more or less indistinct; it has yellow hairs, 



not quite short and directed forwards, in front of the ocelli black 



hairs. Third antennal joint slightly larger than in the male. Thorax 



more coarsely punctate, with a pubescence of shorter and somewhat 



long, rather erect, yellow hairs; some of the longer hairs are dark, 



especially behind, and likevvise some on scutellum; scutellar marginal 



bristles a little shorter but stronger tiian in the male. Abdomen 



somewhat bluish black, shining ; the hairs somewhat short and depressed, 



but erect at the basal corners of the segments; they are whitish at 



the sides and just at the front margins of the segments, but other- 



wise black on the middle, this giving rise to narrow, arcuated bands 



of whitish hairs. Legs a little paler than in the male as the reddish 



parts are more bright, and the base of middle metatarsi and the front 



tarsi below more or less yellowish; the legs are quite pale-haired, 



and hind femora without black bristles below. Wings often a little 



less tinged. 



