Studies in Fruit Flies. Part L Dacini — Hardy and Adachi 
177 
each measure about 0.78 mm.; the former is 
about 0.14 mm. at its widest point, and the 
latter is about 0.21 mm. The preapical setae 
are tiny and inconspicuous, visible only under 
high power (Fig. I6c); they are situated about 
0.07 mm. from the apex of the piercer. The 
opening of the oviduct is located about 0.2 
mm from the apex. The rasper extends to 
within 0.15 mm. of the base of segment eight. 
The basal segment (seven) is 0.86 mm. long 
by 0.73 mm. wide at its widest point; the 
spiracles are situated about 0.18 mm. from 
the base of the segment, measured along the 
lateral margins. 
Length: Body, 5. 0-5. 5 mm.; wings, 4.5- 
5.0 mm. 
TYPE LOCALITY: Panay, Antique Prov., 
Batbatan Island, Philippine Islands. 
Bezzi said the type was in his collection. 
According to Horn and Kahle (1935), his 
collection went to the Museo Civico di 
Storia Naturale, Milan. 
No specimens have been seen from the 
Philippines, but a good series are on hand 
from Singapore, Malaya, May, 1949, ex 
Gnetum gnemon (N. L. H. Krauss). 
Dams {Strumeta) muiri n. sp. 
Fig. 17 
This species is very close to D. dorsalis and 
can be separated only by the ovipositor. The 
ovipositor is very broad compared to its 
length, and the apex is abruptly narrowed 
beyond the oviduct. (Compare Figs. 17^ 
and 8c.) 
FEMALE. Head: The front, measured from 
the lower ocellus to the antennae, is about 
1.5 times as long as wide; it is approximately 
equal in width to one compound eye. Two 
pairs of inferior fronto-orbital bristles and one 
pair of superior fronto-orbitals are present. 
The large black spots on the face are oval in 
shape. The third antennal segment is dis- 
colored with brown and is approximately four 
times as long as wide. Thorax: Colored as in 
dorsalis except that the postsutural yellow vit- 
tae end at, or slightly before, the inner supra- 
alar bristles. Legs: The tibiae are all brownish 
red; the femora are yellow tinged with red; 
they are darker in color than is typical of 
dorsalis; the specimen at hand may be slightly 
discolored in this respect. Wings: Very similar 
in most respects to those of dorsalis, except 
that the costal band extends through a por- 
tion of cell Rs throughout its length, as in 
the variety occipitalis. On the specimen at hand 
an extra crossvein is present in about the 
middle portion of cell R 3 ; this is present on 
both wings, but the specimen may be a freak 
in this regard. Abdomen: Very similar to dor- 
salis except that the third segment is almost 
entirely reddish brown to blackish on the 
dorsum. Ovipositor: When fully extended (Fig. 
17^), the ovipositor measures approximately 
4.31 mm. The piercer measures about 1.17 
mm. by 0.28 mm. The apical portion is very 
abruptly narrowed beyond the oviduct (Fig. 
17^). The distal setae are situated about 0.08 
mm. from the apex of the piercer; two mod- 
erately large and two very small setae are 
present. The opening of the oviduct is located 
about 0.15 mm. from the apex. The inversion 
membrane is about 1.58 mm. long by 0.44 
mm. wide at its widest point. The rasper ex- 
tends to within about 0.42 mm. of the base 
Fig. 17. Dacus {Strumeta) muiri n. sp. a. Extended 
ovipositor; b, apex of piercer. 
