340 PERCY SLADEN TRUST EXPEDITION 
two small spots above wing base: a similar very small spot behind the last d. c. b. 
Humeri orange, as is an irregular spot above the n. p. b. The pleure are dusky orange 
in varying degrees of intensity. The bristles are two d. ¢., one h., n. p., presut. (small), 
two over wing, p.a. Scutellum as thorax, with two pollinated basal side spots and a 
terminal one. Terminal b. crossed at tip, side-basal ones somewhat convergent. The 
wings, as Fig. 24, pellucid with orange veins, costa strong to third, weaker to fourth ; 
no slit at end of 1st segment, but bristles there. Halters orange. Legs pale with 
darkened front femora, and faint indistinct darkened rings proximally and distally 
on other femora and proximally on the tibis, the middle one of which has a long 
terminal spur. 
Abdomen. Dorsal view: 2nd segment yellow with black distal margin, interrupted 
in middle third; 3rd segment yellow with similar interrupted margin, but can best be 
described as black with three yellow spots, two lateral ones extending to proximal margin, 
mid one sub-triangular and extending across segment ; 4th black with three yellow spots 
attached to proximal edge; 5th with three similar but much smaller spots; rest all black. 
All the distal edges are narrowly yellow. In side view, 2, 3, 4 have distinct yellow 
spots: genitalia yellow. All segments with fairly stout bristles, both discal and 
marginal. 
Size, 15 mm.; wing, about 1°6 mm. 
Localities. Seychelles. Praslin: Cotes d’Or Estate, XI. 1908, 7 specimens. Mahé: 
Mare aux Cochons district, 1000—2000 feet, I. 1909. 
36. Drosophila finitima, n. sp. (Fig. 25 and Plate 20, fig. 27). 
Head. Eyes closely and finely pubescent, vertex somewhat concave behind. Top 
view :—frons matt orange; the eye-margins, and a rather small though definite triangle 
surrounding and including the ocellar area, shining. Nearly parallel front f. o., slightly 
div. hind f. 0.; the continuing row of bristles present, the first large and opposite 
front f. 0. Conv. i. v.; div. 0. v.; p. v. crossed about one-third from tip, inserted below 
vertex ; div. ocellar based between the large front ocellus and the side ones. Ocellar area 
with small bristles; 3 or 4 small crossed bristles on front of frons and a few more over the 
antennal bases. Front view :—face slightly greyish-yellow: large 2nd antennal joints 
touching at base: a central keel starts just below them and runs down to level of third 
joint, widening a little, and cut off from upper lip by a groove. Side view (Plate 20, 
fiz. 27):—orange 2nd antennal joint, bristled, with two longer ones: 3rd joint a little 
suffused ; arista long-rayed, five top, two bottom and a terminal ray, inner row continuous 
but of fine bristles. One vibrissa, with stoutish bristle-row along edge of orange lower eye- 
margin, orange hind jowls with bristles; post-orb. row especially strong behind v. b. 
Palpi and tongue orange, former slightly clubbed and bristled at end. 
Thorax. Brown-orange, somewhat shining, bristled dorsally to a little beyond level 
of first d.c., then bare. Two pairs d. ¢. with little bristles forming six-rowed acrostichals 
between them, and eight-rowed beyond: 2 smallish h., n. p., pr. sut., 2s. a, p. a; 3 
nearly equal st. pl. Scutellum as thorax, bare, crossed terminal and equal side bristles 
