Mr. J. R. Malloch on Evotie Muscaride. 163 
hind tibia with two antero-ventral and two antero-dorsal 
bristles. One of the bristles at base of third wing-vein very 
long ; outer cross-vein nearly straight; fourth vein as in 
meditabunda. 
Length 6 mm. 
Type, 5 to 7 miles into Kenia Forest, near Luchi River, 
British Kast Africa, 9-10. ii. 1911 (7. J. Anderson), One 
female. 
Genus Dicuxromyia, nov. 
Generic characters.—Eyes of male separated by over twice 
the distance across posterior ocelli, of female widely separated; 
frons without cruciate bristles ; orbits without a forwardly 
directed bristle at middle ; thorax with one strong and one 
very weak presutural and two strong postsutural dorso- 
central bristles ; prealar minute ; anterior intra-alar absent ; 
scutellum with some hairs on ventral surface; prosternum 
hairy on sides; pteropleura with a group of hairs on upper 
margin aud one or two in centre; hypopleura bare ; spiracle 
with a series of short black hairs along the lower margin ; 
third wing-vein bare at base, curved forward at apex; hind 
tibia with a few weak postero-dorsal setulz, without calcar. 
Genotype, the following species. 
Dichetomyia polita, sp. a. 
Female.—Black, glossy, slightly greyish pruinescent. 
Head, including antenne and palpi, black ; face, orbits, and 
cheeks with white pruinescence. Thorax distinctly quadri- 
vittate, the spaces between the vittz pale grey pruinescent. 
Abdomen unmarked. Legs rufous yellow, cox infuscated. 
Wings slightly yellowish, veins brown. Calyptre yellow. 
Halteres brownish yellow. 
Eyes almost bare; upper infraorbital bristles very small 
and weak; third antennal segment with a small sensory 
puncture on outer side near base of arista, the latter with 
very long hairs above and below. Presutural acrostichals 
absent ; sternopleurals 1:2, the lower posterior one weak. 
Fore tibia with one median posterior bristle; mid-femur 
without ventral bristles on basal half; mid-tibia with two 
posterior bristles ; hind femur with one preapical antero- 
ventral bristle; hind tibia with two antero-ventral and one 
antero-dorsal bristle, and three or four weak postero-dorsal 
setule. Costal thorn long; outer eross-vein straight. 
Male.—Similar to female. Hypopygium small. 
Length 6mm. 
z1* 
