MEXICAN MUSCIDAR. 189 
abdomen, and legs, black; wings blackish along the costa. — 
Length 7,5 mm, 
Xanthomelana gracilenta n. sp. 4 9. — Thorax black with 
yellow or whitish markings; head yellow (8) or white (2); frontal 
band, antennae, and legs, black; abdomen yellow, with a dorsal 
band and the last segment black; tegulae and halteres pale yellow ; 
costal half of the wings blackish. — Length 4,5 mm. 
Xanthomelana anceps n. sp. 4. — Deep black, including 
the antennae, legs, tegulae and halteres, only the abdomen yello- 
wish-red; wings blackish; front triangular, the eyes nearly conti- 
guous on the vertex, — Length 5 mm. 
PHANINAE. 
CLINOGASTER n. gen. — Front slightly prominent , as broad 
as the eyes; frontal bristles weak; no orbital bristles; two stronger 
bristles on the vertex; face somewhat inclined ; occiput swollen; 
vibrissae rudimentary. Eyes bare. Antennae elongate, nearly as 
long as the face; first joint very short; the second much longer , 
the third twice as long as the second; arista bare. Thorax with 
macrochaetae; abdomen elongate, curved down; four visible seg- 
ments, the anal segment short; some short marginal macrochaetae. 
Legs slender; foot-claws and pulvilli elongate in 4. Wings shorter 
than the abdomen; apical cell closed and shortly petiolated; cur- 
vation of the fourth vein with acute angle. 
Clinogaster notabilis n. sp. 3. — Black; face and reflec- 
tions on the thorax whitish; hind margins of the first two abdo- 
minal segments narrowly yellow; anal segment and base of the 
antennae rufous; wings with a brown shadow at the end of the 
costa; their base yellowish. — Length 12,5 mm. 
PENTHOSIA n. gen. — Front slightly prominent, broad in both 
