176 
Dacus (Strumeta) mcgregori 
(Bezzi), n. comb. 
Fig. 16 
Chaetodacus mcgregori Bezzi, 1919, Philippine 
Jour. Sci. 15(5): 426, pL 1, fig. 7. 
This species is distinguished from all other 
Dacus {Strumeta) known from the Philippines 
by its all-yellow face, by the peculiar bulla on 
the male wing developed above the cubical 
vein (Fig. 16^3^), and by the unusually short 
antennae (Fig. 16^). 
MALE AND FEMALE. The front is slightly 
discolored in the median portion but has no 
spots at the bases of the bristles; it is approx- 
imately twice as long as wide. Two pairs of 
inferior fronto-orbitals and one pair of supe- 
rior fronto-orbital bristles are present. The 
third antennal segment is brownish red, just 
slightly more than twice as long as wide and 
much shorter than the face (Fig. iGb). The 
Fig. 16. Dacus {Strumeta) mcgregori (Bezzi). a. Ex- 
tended ovipositor; b, antenna; c, apex of piercer; d, 
wing. 
PACIFIC SCIENCE, Vol. VIII, April, 1954 
third segment is very slightly longer in the 
female than in the male. The face is straight 
or nearly so in profile. The face and the occi- 
put are all yellow. Thorax: Entirely rufous or 
yellow except for the following brown to 
black areas: Narrow hind margin of scutellum, 
entire metanotum, and lower portion of meta- 
pleura, the hypopleura, the median portion of 
the pteropleura, the upper edge of the sterno- 
pleura, and the lower front corner of the meso- 
pleura. The portion directly behind the humeri 
is yellow, the area between the humeri and 
the notopleura is chiefly rufous, not clear yel- 
low. The two postsutural yellow vittae are 
tapered posteriorly and end at or slightly be- 
fore the inner supraalar bristles. Legs: Yellow, 
with faint brownish discolorations on the hind 
tibiae. Wings: Chiefly hyaline. The costal band 
is comparatively narrow and extends to the 
apex of vein M1+2; the costal band does not 
extend into cell R3 except at its apex. The 
first costal cell and the basal portion of cell 
R are faintly yellowish fumose but are bare of 
microtrichia. The second costal cell is covered 
with microtrichia. The r-m crossvein is straight 
and is less than 0.5 as long as that portion of 
vein Mi +2 from the r-m to the m cross veins. 
The cubital streak is faint yellow brown and 
confined chiefly to the bulla in the male (Fig. 
16^). In the male, the narrowed portion of 
the cubital cell is twice as long as that portion 
from the apex of the cell to the wing margin; 
in the female, of about equal length. Abdomen: 
Predominantly rufous. The second tergum 
has an indistinct stripe of black across the 
median basal portion. The third tergum has 
a complete band of black across its base. The 
third and fourth terga have a median black 
vitta extending longitudinally; this is some- 
times interrupted by rufous on the hind por- 
tion of the fourth segment; the fourth tergum 
also has a large black spot at each anterior 
lateral margin. Ovipositor: Very short (Fig. 
16^). The visible portion {in situ) is less than 
0.5 as long as the fifth abdominal segment. 
The extended ovipositor measures about 2.4 
mm. The piercer and the inversion membrane 
