LAMB—DIPTERA: HETERONEURIDA, ORTALIDA, TRYPETID A, SEPSIDA, ETC. 337 
but a shallow depression for the antennz. Side view (Plate 20, fig. 23):—antenne ; 
2nd joint large, orange, covered with pale bristles with one spine at top; small darkened 
3rd joint, the arista with basal jomts very distinct ; three upper, one lower, one terminal 
ray, the ner row is absent. Short stout vibrissa with usual following row of fine 
bristles. Palpi orange, clubbed; tongue with remarkable file-like surface. The post- 
orbital row is strongly developed just behind the v. b. 
Thorax. Orange, entirely covered with pale brown bristles, last pair d.c. very close 
to scutellum ; humeri with two large and a few other bristles, 2 n. p., presut., 3 over 
wing-base, one small and one large sternopl. Scutellum orange, bare, flattened, shaped 
like a triangle with much-rounded apex ; terminal bristles crossed about 4 from tip, a long 
bristle on side of scutellum, slightly convergent to centre line. Wings, Fig. 22, slightly 
yellowish ; costal slit present, but no thickening; costa to 4. Halters orange. Legs 
all orange, femoral rows of bristles weak; front tarsi with remarkable spines beneath 
(Plate 20, fig. 23), black claws and a few curious long hairs on the last jomts. The 
other tarsi have no spines, but possess the black claws and the hairs. All the other 
spines are very weak, though there is a moderate terminal mid-tibial spur. 
Abdomen broad, browner on disc with scattered discal and marginal bristles. The 
genital segments are large, forming in profile a blunt triangle whose length is roughly 
equal to that of the rest of the abdomen ; this triangle’s axis is about perpendicular to the 
body-axis. There is the usual hairy hump behind, and the tip of the triangle is formed 
by the, ovipositor, which has a crown of stout short black spines. 
Size, about 13 mm. ; wing, a little over 12 mm. 
Localities. Seychelles. Mahé: near Morne Blanc, X. 1908. Silhouette: Mare aux 
Cochons, IX. 1908. Praslin: Cotes d’Or Estate, XI. 1908. 
33. Drosophila hirtipes, n. sp. (Fig. 23 and Plate 20, fig. 25). 
There are two specimens of this species, both males: the dorsal sides of the front 
tibia and tarsus are provided with remarkable long curved hairs. 
é Head. LEyes minutely and closely pubescent, the hairs very short, and rather 
fine. Top view :—eye-margins from vertex to front f. o., dullish brown-orange ; the 
ocellar area the same, with a rounded front margin; between these the frons is more 
shining orange: the ocellar area from in front to the vertex as well as the front of the 
frons is clothed with distinct bristly hairs. Front f. 0. sub-parallel, hind diverging; the 
continuing bristle row of the latter well marked down to forehead, its first bristle (just 
behind and outside the lower f. 0.) much the largest. I. v. nearly touching at the 
tip, o. v. divergent; behind these (just below the top eye-margins) the last 2 or 3 
bristles of the strongly marked post-orbital border are especially prominent, and converge 
to the centre. P. v. inserted on the vertical angles of the ocellar area, somewhat con- 
vergent. Oc. long, much divergent, inserted just outside and behind the front ocellus. 
Front view:—the large 2nd joints of the antenna are separated by a distinct space, in 
the middle of which is the upper narrow part of the facial keel; this broadens uniformly 
to the thickened upper lip with which it is almost confluent. The mouth-opening 
