338 PERCY SLADEN TRUST EXPEDITION 
is unusually large: the face is all blackish with minute pollination, except for the 
space between the antennal bases. Owing to the broad face, the antennal fovez are 
rather shallow, the bottom being but little below the level of the eye-plane. Side 
view (Plate 20, fig. 25):—the large 2nd antennal joint is orange, its inner face with long 
hairs; there is an especially conspicuous top bristle, and two near the front margin, a 
fourth lying between the top one and the others; the smallish dark 3rd joint is slightly 
silky ; the arista has 6 straight upper, 2 lower and a terminal ray, the inner row has 
some 5 or 6 rays. On each side of the face there is a clump of about 4 stout vibrissz, 
followed by a strong row along the lower eye-margin : hind jowls, &c., with many bristles, 
3 or 4 being especially long. Palpi dark, clubbed, strongly bristled at the end; tongue 
rather paler, a few long bristles behind, and very bristly at the tip. 
Thorax. Moderately shining black with minute sparse golden pollen: the surface 
is covered with exceptionally stout and long discal bristles, which form acrostichals 
which are irregularly 6-rowed between the two pairs of approximated d. c.; the last 
discal bristles might be considered to form 4 true (though small) prescutellars. The 
humeri are somewhat orange, and bear two bristles; n., presut., alar and p. a. as usual, 
but very strong. Two very long sternopl.: the pleuree more orange. Scutellum as thorax, 
but entirely bare: rather spade-shaped in profile, and flattened; two crossed terminal 
and two long slightly convergent side bristles, inserted at about one-third the distance 
from the base to the terminal pair. Wings, Fig. 23, slightly yellowish with brown veins: 
eee es 
Fig. 23. Drosophila hirtipes, n. sp. ~x 30. 
costa more bristly than usual, extending to 4, but the bristles ending before 3: no true 
costal slit. The alule have quite long ciliation. Halters orange. Legs all orange, the 
front legs with an inferior femoral row of three very stout bristles, the back row of 3 or 4 
is much less strong: strong spur and preapical to the middle tibia. All the legs with 
neatly arranged rows of general bristles. The most remarkable character is in the front 
legs. The tibia has two irregular rows of long hairs which begin a little before half-way ; 
they number some 8 or 9: each is bent upwards in side view and inwards in front view. 
The first tarsal joint is similarly provided with 8 to 10 hairs, and a few more occur at the 
ends of the next 2 or 3 joints. 
Abdomen. All brownish-black with numerous discal, and long marginal, bristles. 
The whole insect is remarkably bristly for a Drosophila. 
Size, about 3 mm.; wing, about 25 mm. 
Localities. Seychelles. Mahé: Cascade Estate, 800 feet or above; marshes on 
coastal plain, Anse aux Pins and Anse Royale, I. 1909. 
