LAMB—DIPTERA: HETERONEURIDA, ORTALIDA, TRYPETIDA, SEPSID4, ETC. 355 
51. Chiromyia sexspinosa, n. sp. (Fig. 36 and Plate 21, fig. 45). 
Four males of a very distinct form. 
Head. Top view :—colour and cheetotaxy as last species except as follows : ocelli 
in an equilateral triangle, post-orb. row much longer. Front view :—the eyes are nearest 
just above antennal bases. Side view (Plate 21, fig. 45):—jowls a little deeper and 
hairy, but the broad true eye-margins are bare. Antennze rather more orange. Palpi &c. 
as last. 
Thorax. Very much as last but all the bristles much stouter, the p. a. especially so; 
small prescut., only one h. bristle that is of any 
size. Colour the same. 
Scutellum bare, in no way flattened; sub- 
parallel terminal, two side, and two small discal 
bristles behind the terminal. Wings, Fig. 36, much 
as last, as are the halters and legs. 

Abdomen. Dark orange, basal segment with 
Fig. 36. Chiromyia seaspinosa, 
extensively blackened upper corners, the others with 
a distinct round spot each side and an indistinct ees 
darkening in centre line. 
Size, 2 mm.; wing, about 13 mm. 
Locality. Seychelles. Mahé: Cascade Estate, 800 feet or over, 1908—9. 
52. Chiromyia hirtiscutellata, n. sp. (Fig. 37 and Plate 21, fig. 46). 
Two males: this species has bristles nearly as pale as the European forms. 
Head. Top view :—pale yellow with very slight shininess. The basal ocelli nearer 
together than distance from basal to front. The cheetotaxy is quite normal, though slightly 
longer than the other species. The small upward pointing bristles behind the v. b. are very 
regular and well developed; the post-orb. group behind the eye is composed of much longer 
bristles than usual and overlaps the true p. 0. row: p. v. crossed half-way. Front view :— 
the eyes are nearest below the bases of the touching antenne: face white. Side view 
(Plate 21, fig. 46):—the eyes are rather rounded, antennee yellow with browner flagellum, 
and a yellow hair on 2nd joint above. The jowls are very broad behind, covered with 
yellow bristles except on eye-margins ; 3 distinct vibrissal pairs meeting or just crossing. 
Thorax. Coloured as usual; the d. c. pair preceded by a smaller auxiliary pair: 
dorsal bristling profuse but irregular. A 
very large and strong h. b.; n. p., and p. a. 
are also very long and strong, a smaller 
presut. and s. a. Single mesop. and st. pl. 
Scutellum slightly flattened, long touching 
terminal, shorter side bristles, and some 6 
or 8 small discal bristles. Wings, Fig. 37, 
quite normal. Halters with bright yellow 
knobs. Legs normal. Fig. 37. Chiromyia hirtiscutellata, n. sp. x 40. 
SECOND SERIES—ZOOLOGY, VOL. XVI. 46 

