LAMB—DIPTERA: HETERONEURIDA, ORTALID A, TRYPETIDA, SEPSIDA, ETC. 341 
inserted fairly near base. Wings, Fig. 25, slightly yellowish with brownish veins ; costa 
as usual, dark ciliated to between 3 and 4, fine and rather long cilize to fourth. Halters 
pale orange. Legs: all yellow-orange, a rather weak distal hind row of 3 or 4 front 
femoral bristles: usual mid-tibial spur. 
Abdomen. Brownish-black to black in mature specimens, sometimes paler at base ; 
third segment shining black at base except in middle, fourth with basal half shining, 
last almost all shining. In the female the bands are usually indistinctly dull orange : 
there is a certain amount of variability in the abdominal colour: in one or two females 
there is no sign of marks, and the abdomen is uniformly black. 




Fig. 25. Drosophila finituma, n. sp. x 40. 
Size, about 13 mm. ; wing, about 12 mm. 
Localitws. Seychelles. Silhouette: Mare aux Cochons and forest above, IX. 1908 ; 
highest forest, ca. 2000 feet, 1908. Mahé: high forest of Morne Blanc and Pilot, 
X.—XI. 1908; slopes of Morne Seychellois, over 1500 feet, II. 1909; Cascade Estate, 
800 feet or above. 
37. Drosophila caliginosa, n. sp. (Fig. 26 and Plate 20, fig. 28). 
This is a small dark species which should be near D. nigra (de Meijere, Tijdschr. 
Ent., li. (1908), p. 153) but the legs differ from his description. 
Head. Eyes with dense, short, stubby pubescence. Top view :—frons entirely 
black, eye-margins shiny, extending beyond front f. 0. in a blunt point, a well-marked 
shining frontal triangle extending two-thirds towards forehead, with very sharp bounding 
lines; the rest of the frons (forming a Y-shaped area with broad stalk on forehead, and 
arms narrowing to vertex) is dull black. Front f. 0. sub-parallel and bent forward ; hind 
bent outwards and backwards, the row of small bristles from this to frons are present, 
the first being quite large. I. and o. v. as usual; p. v. rather small, just crossed; 
oc. almost parallel, inserted one outside each side of, and nearly in line with the front 
ocellus : the ocellar area has a few minute bristles. Front view :—the lunular edge over 
the antennze is somewhat orange: the antennz are separated at the base by the median 
keel, which widens out along the line of the third antennal joint to form a well-marked 
snout extending down to the somewhat swollen mouth-margin, but well separated there- 
from. The face is all dark, but slightly pollinated. Side view (Plate 20, fig. 28) :—second 
449 
