188 DIAGNOSES OF NEW 
XANTHOMELANA n. gen. — Head broader than the thorax; 
front not prominent, in both sexes broadly separating the eyes 
(except one species, anceps, in which the front is triangular in à 
and the eyes nearly contiguous on the vertex); frontal bristles 
weak; vibrissae at some distance above the oral margin, which is 
slightly prominent. Antennae shorter than the face; third joint 
oval or elliptical; arista bare. Abdomen cylindrical, showing five 
segments, with marginal macrochaetae. Legs with some bristles; 
foot-claws and pulvilli elongate in the 4. Wings usually blackish 
along the costa; curvation of the fourth vein rounded; apical cell 
closed and shortly petiolated at the wings tip. — The flies of this 
genus are black with more or less extended yellow or rufous por- 
tions on the abdomen. 
Xanthomelana articulata n. sp. d. — Black; head, shoul- 
ders and the transverse suture of the thorax yellow; abdomen 
rufous, black towards the end; femora rufous at the base; wings 
blackish, more obscure towards the costa; antennae elongate, the 
arista thick and distinctly jointed at the base. — Length 5 mm. 
Xanthomelana rubicunda n. sp. (4 ?). — Thorax black with 
yellow and whitish markings; head white; antennae short, arista 
not visibly jointed; abdomen and legs rufous; antennae, frontal 
band, scutellum, and the last two segments of the abdomen, black ; 
wings blackish, darker at the base and along the costa. — Leugth 
4,5 mm. 
Xanthomelana dorsalis n. sp. 4 g. — Thorax Llack with 
yellow markings; abdomen yellow, with a black dorsal band or 
black dorsal spots; head pale yellow; legs black, the coxae and 
base of the femora yellow; wings black on the costal half. — 
Length 7 mm. 
Xanthomelana trigonalis n. sp. 4. — Yellow; frontal band, 
antennae, three stripes on the thorax, trigonal dorsal spots on the 
