164 Mr. J. R. Malloch on Hwotie Muscaridee. 
Type, female, one paratype and allotype, east side of 
edge of forest of the Aberdare Mts., British East Africa, 
7300 feet, 24. ii. 1911 (7. J. Anderson). 
This genus is related to Muscina, R.-D., but differs from 
it in having the pteropleura and prosternum hairy and in the 
cheetotaxy of the thoracic dorsum. 
Genus XENOMYIA, Nov. 
Generic characters.—Proboscis very short and thick, about 
as broad as long, the ventral side pruinescent and hairy, the 
apex with four chitinized rods on each side; third antennal 
segment slightly tapered from middle to apex; arista 
pubescent ; vertex with only one strong bristle on each side ; 
posthumeral bristle absent ; anterior intra-alar in transverse 
line with anterior postsutural dorso-central ; hypopleura 
bare; hind tibia with a bristle on middle of postero-dorsal 
surface. Third vein bare at base. 
Genotype, the following species. 
Xenomyia atra, sp. n. 
Female.—-Black, shining, with bluish-grey pruinescence. 
Head black, entire frons velvety ; face, parafacials, and 
cheeks with whitish tomentum; antenne black; palpi 
yellow. Dorsum of thorax velvety brownish black, the sides 
and a spot above each postalar callosity bluish-grey pruin- 
escent ; pleure grey pruinescent, except on upper part of 
mesopleura and pteropleura. Dorsum of abdomen shining, 
lateral margins of all tergites, anterior margin of all four, and 
posterior margin of fourth on outer half bluish-grey pruin- 
escent. Legs black. Wings very slightly and evenly. smoky, 
veins black. Calyptre brown, margins fuscous. Halteres 
bright yellow. 
Frons a little over one-third of the head-width ; orbits 
not clearly differentiated ; upper two pairs of orbitals small, 
upper pair of infraorbitals directed inward, lying close to 
surface, numerous hairs present in addition to the bristles ; 
face slightly receding below ; parafacial at base of antenna 
as wide as third antennal segment, much narrowed below ; 
third antennal segment about three times as long as second, 
tapered from middle to apex ; arista long and slender, much 
swollen at base; cheek about as high as width of third 
antential segment, with hairs along lower margin and 
continued well above vibriss, the latter strong. Thorax 
bare between presutural dorso-centrals ; postsutural dorso- 
centrals 8; sterno-pleurals 1:1. Genital segments without 
= 
Oe 
