LAMB—DIPTERA: HETERONEURIDA), ORTALIDA, TRYPETIDA, SEPSIDA), ETC. 333 
with a well-marked outwardly divergent tip bristle, and a smaller one outside towards 
the end: it is orange in colour; 3rd joint suffused darker orange, pubescent ; arista with 
five upper, two lower, one terminal, and two or three sparse inner rays. Vibrissa con- 
vergent, followed by an extra fine hair row ; a few bristles on the hind jowl: post-orb. row 
well behind the eyes. Palpi small, very slightly clubbed, orange. Tongue orange. 
Thorax. Shining brown-black up to a line extending from below the humeri to the 
abdominal insertion, paler on the humeri; the pleura and sternum yellowish white. 
Dorsum covered with fine pale hairs. One d. c. pair, two h., n. p., small presut., three 
over wing (one being the post-alar), two strong sternopl. Scutellum minutely pubescent, 
rounded in outline, and swollen and rounded in profile; terminal bristles crossed at tip, 
smaller side ones fairly near base. The metanotum is well developed in breadth and is 
shining brown. 
Wings as Fig. 19. Yellowish with brownish veins; a little more darkened just 
below the costal swelling: the slit is well-marked, and 
ends in a rather rounded upwardly bent black hairy 
process. Costa to 4. Halters pale yellow. 
Legs entirely yellowish white, lower and hind 
rows of bristles on the front femora present, the 
bristles weak: mid tibial spur strong. 
Abdomen. Somewhat shining brown-black except: ee 
that (1) the base is paler and (2) the fifth segment has 
two large pale yellow spots which occupy the proximal margins of the segment except for 
about one-third its breadth, and extend in a roughly triangular form over the segment 
nearly to the distal margin, (3) the sixth segment has its sides yellow: it is more shining 
than the others. The second, third and fourth segments are about equal in width, the 
fifth and sixth are nearly twice as wide; genital segments orange-yellow. 
19. Drosophila nigrobrunnea, 
n. sp. x 30. 
Size, just under 2 mm.; wing, just under 2 mm. 
Localities. Seychelles. Mahé: Cascade Estate, 800 feet or over, Praslin: Cotes 
d'Or Estate, XI. 1908. 
30. Drosophila punctiscutata, n. sp. (Fig. 20 and Plate 20, fig. 19). 
This is a single @ specimen of a narrow form which has a strong superficial 
resemblance to Chymomyza. Oc. bristles on front of ocellar triangle. 
Head. Eyes densely though shortly pubescent. Top view :—frons entirely shining 
black ; with a side light the eye-margins and a long triangle nearly reaching the forehead 
can be seen to be differentiated by being rather greyer in tone. The frons is about as broad 
in front as its axial length, and widens in a curved line along the eyes to the vertex. It is 
coneave behind. The ocelli stand out brilliantly as three silvery spots. The front f. o. 
parallel and forward bent, hind f. 0. inserted close behind them, bent back and continued by 
a row of equal fine bristles to the front. I. v. just off vertex, much cony. ; 0. v. just at 
angle of vertex close to i. v., div.; p. v. just on curve of vertex, crossed well below tips ; 
oc. long, div., inserted on frons in front of front ocellus and with bases further apart than 
4133) 

