LAMB—DIPTERA: HETERONEURID@, ORTALIDA, TRYPETID®, SEPSIDA, ETC. 357 
pair next to the d.c.’s are little bigger than others which are like the other general 
bristles of the dorsum. The fine dorsal bristles form six approximately regular acy. 
rows; h., two n. p., presut., rather large p. a., small prescut., two basal, two terminal ; 
scutellars just crossed at tip. Metapleura dark grey brown. Wings as Fig. 38: veins 
pale brown. Halters with almost white head and orange 
stalks. Legs pale yellow, a row of small spines on top of front 
femora. 
Abdomen. Second to fourth segments grey with narrow 
pale margins; next with two dark spots confluent proximally 
on fifth segment, discrete and smaller on the next. Fig. 38. Aphaniosoma 
seavittata, n. sp. x 30. 
Size, about 1-4 mm.; wing, about 14 mm. 
Locality. Seychelles. Mahé: Cascade Estate, at or above 800 feet, 1908—9. 
AMYGDALOPS, n. ¢. 
See Plate 21, fig. 48. 
Head. Eyes sparsely pubescent under high power. Top view (Plate 21, fig. 50) :— 
frons about as wide as eye-breadth : somewhat convergent in front. Hind head concave, 
but little excavate. Front and back pair of f. 0. parallel to axis, bent a little backwards: 
front pair near antennze with small ancillary bristle in front: hind mid-way between hind 
end eye-margin and the front one. I. v. conv. (only the insertions shown in fig.), 0. y. div., 
inserted right on edge of vertex and rather close together. P. v. crossed at tip, inserted 
below vertical ridge and each opposite a hind ocellus. Long fine oc. inserted just outside 
middle of line joining front to back ocellus. Front view (Plate 21, fig. 49):—face narrowest 
about level of end of third antennal joint, no keel, but two fine furrows demarcating the 
front eye-margins. The antennze touch at the base. Side view (Plate 21, fig. 51, the axis 
of head is much inclined to horizontal in the fig.):—head much longer than deep, the eyes 
much pointed at the projecting hind upper angle. Forehead very visible in front. Antenne 
erect at base, second joint with an upwardly-directed bristle above at end; third sub- 
triangular, with the rounded tip very elegantly haired. Arista very like a Drosophilid : 
upper set of rays, longer and closer at base, lower set and an evident inner row (see p. 326). 
The jowls deepen from front to back ; there is a pair of strong vibrissee each side and hairs 
along margin of jowl. The post-orb. row is confined to the upper hind angle, and is small. 
The palpi are rather long, slightly clubbed and flattened in vertical plane. 
Thorax. Normal in form; scutellum somewhat arched, roughly triangular in plan, 
with rounded tip. Last pair d. c., four rowed 
aer. conv. in front, h., n. p., two small b. over 
wing, div. somewhat upwardly-arched long 
terminal scutellars and two small sub-discal 
bristles. Two rather small st. pl. Wings, Fig. 
39: there is a fine regular black costal bristling Se Sane i 
between ends of 1 and 2, bey ond it is a pale Fig. 39. Amygdalops thomasseti, n. sp. x 30. 
eiliation. The end of 5 is remote from the 
margin. Legs normal, a few long bristles in a row below front and hind femora. 
46—2 

