156 
PACIFIC SCIENCE, VoL V, April, 1951 
humerus; usually interrupted at the suture. 
The disc portion of the scutellum is brown, 
the margins are yellow. In teneral specimens 
the entire scutellum may be yellow. Wings: 
First two costal cells faintly yellow to almost 
hyaline, devoid of microtrichia except in the 
apical part of the second cell and sometimes 
along the extreme top margin of the first cell. 
The costal band is conspicuous but is not 
noticeably extended below vein R3 except at 
its apex. The cubital streak is broad and fills 
all of the basal portion of cell M4. The nar- 
rowed portion of the cubital cell is about two 
times longer than the free portion of vein 
Cui+lst A. Abdomen: Varying from yellow- 
brown to almost all yellowish, probably de- 
pending upon tenerality. The large brown to 
black lateral spots on the fifth tergum are 
very conspicuous. 
Length: Body, 5. 5-7.0 mm.; wings, 5.0- 
6,0 mm. 
FEMALE. The narrowed portion of the cu- 
bital cell is about one and one-third longer 
than Cui+lst A. Ovipositor: Conspicuous and 
well developed; the exposed portion is about 
equal in length to segments 3 to 5 of the 
abdomen. The extended ovipositor (Fig. 17^) 
is approximately 5.0 mm. long. The piercer 
is about 1.56 mm. long by 0.15 mm. wide. 
The end of the oviduct is about 0.19 mm. 
from the apex of the piercer. The setae are 
situated about 0.02 mm. from the apex or 
about two times the length of the plate bear- 
ing the setae or the length of the longest pair. 
The apex of the piercer is rather blunt when 
viewed under high magnification (Fig. 17^). 
The inversion membrane is about 2.0 mm. 
long by 0.2 mm. wide, measured at its base. 
The scales are thorn-like and extend to within 
about 0.6 mm, from the base of the segment. 
The base of the ovipositor is about 1.46 mm. 
long by 1,0 mm. across its hind margin. 
TYPE locality: Southport, South Queens- 
land. 
Type in the Queensland Museum. 
Specimens were sent in by Mr. Krauss from 
Narara, New South Wales, Nov. 29, 1933, 
ex Eugenia sp. (coll, by C. P. Hely). 
Dacus (Strumeta) krausst n. sp. 
Fig. l^a-c 
This species occupies a borderline position 
between the group of species in which the 
first two sections of the costa are yellow- 
fumose and those species in which these cells 
are hyaline. D, kraussi is related to D. tryoni 
(Froggatt) and has probably been confused 
with that species. The most striking differ- 
ences in the two species are in the female ovi- 
positors. In D. kraussi the ovipositor is nearly 
two times longer than that of D. tryoni; more- 
over, it is much more slender and differs in 
several structural details. The first and second 
costal cells are subhyaline to lightly yellowish 
and are devoid of microtrichia except along 
the top margin of the first cell and the apical 
half of the second. In D. tryoni the costal cells 
are bright yellow-fumose and are densely 
covered with microtrichia throughout the 
second cell and the apical half and top margin 
of the first. In D. kraussi^ cell R5 (the apical 
cell) is expanded at its apex. Veins R4+5 and 
Ml +2 are slightly divergent at their apices so 
that the cell is broader at the apex than at any 
other point; its width is equal to the length 
of the m crossvein. In D. tryoni the apical cell 
is not expanded at the apex; it is as broad at 
a point opposite the m crossvein as it is at 
the wing margin, and the width at the apex 
of the cell is less than the length of the m 
crossvein. 
This species is also related to D. barring- 
toniae (Tryon). In the preliminary studies of 
this collection some of the specimens under 
this series were classified as "'barringtoniaeF' 
The species are easily separated by the com- 
paratively elongate ovipositor of D. kraussi 
and the very short stubby ovipositor of D. 
barringtoniae, by the yellowish costal cells in 
D. kraussi and the milky white cells in D. 
barringtoniae, and by the predominantly black 
abdomen of D. kraussi with the third tergum 
