148 
PACIFIC SCIENCE, VoL V, April, 1951 
in the collection from Cairns, ex guava, 
Apr., 1950. The ovipositor is just slightly 
longer but is structurally the same. 
Dacus (Strumeta) bryoniae (Tryon) 
Fig. 13a, b 
Chaetodacus bryoniae Tryon 1927. Roy. Soc. 
Queensland, Proc. 38(14): 192. 
This species is easily separated from other 
Australian species of Dacus by the broad 
costal band, the yellow costal cells nearly 
devoid of microtrichia, and the characteristic 
development of the female ovipositor. 
MALE. Comparatively large, chiefly black- 
bodied species. Head: All rufous except for 
the shining black facial spots and the ocellar 
triangle. The median portion of the front 
and the bases of the frontal bristles are just 
slightly discolored with brownish. The front 
is parallel sided and is one and one-half times 
longer than wide. There are two pairs of 
inferior fronto-orbital bristles. The facial 
spots are circular to oval and are equal in 
length to about one-fourth the length of the 
face. The antennae are reddish, tinged with 
brownish on the third segment. The second 
segment is nearly two times longer than the 
first and is nearly half as long as the third. The 
third segment is about four times longer than 
broad. All of the head bristles are dark brown 
to black. Thorax: Dorsum all black except for 
the usual yellow markings which include two 
rather broad postsutural vittae. The median 
portion of the mesonotum is grayish pube- 
scent, indistinctly divided into four parts by 
three narrow subshining longitudinal lines. 
The lateral yellow vittae extend from the 
suture to the inner supra-alar bristles. The 
base of the scutellum has a narrow black 
band. The metanotum is black, sometimes 
reddish in the central portion. The yellow 
vertical stripe on the mesopleura is broad and 
nearly parallel sided. Legs: All yellowish, ex- 
cept for brownish coxae, hind tibiae, and api- 
cal subsegments of tarsi. Wings: First two cells 
of the costa distinctly yellow-fumose but de- 
void of microtrichia except in the apical por- 
tion of the second cell. The costal band fills 
all of cell R3 and extends a short distance 
below vein R4+5 along its entire length. At 
the apex of the wing the band extends broadly 
below R4-1-5 about one-third the distance to 
vein Ml +2. The cubital streak is broad; it fills 
all of the basal section of cell M4 and extends 
nearly to the top margin of the m-cu cross - 
vein. The narrowed portion of the cubital 
cell is about three times longer than the sec- 
tion from the apex of the cell to the wing 
margin. Abdomen: Chiefly reddish with a 
broad basal band on the third tergum, a sub- 
basal black band on tergum 2, and a narrow 
black line running longitudinally down the 
middle of terga 3 to 5; this sometimes ex- 
tends but a short distance onto the fifth ter- 
gum. The first tergum is discolored with 
brown to black, at least on the basal portion. 
Length: Body, 7. 8-8.0 mm.; wings, 7.0- 
7.2 mm. 
FEMALE. The narrowed portion of the cubi- 
tal cell is about one and one-fourth times 
longer than the distance from the apex of the 
cell to the wing margin. Ovipositor: Short and 
inconspicuous; in pinned specimens the visi- 
ble portion of the ovipositor is shorter than 
the fifth abdominal segment. The extended 
ovipositor (Fig. 13^) is about 5.3 mm. in 
length and is very broad compared to its 
length. The piercer and the inversion mem- 
brane both measure about 1.9 mm. in length. 
The piercer is broadest just behind the tip of 
the oviduct and at this point measures about 
0.3 mm. in width. The apex of the oviduct 
is approximately 0.45 mm. from the tip of 
the piercer, and the piercer tapers gradually 
from this point to a blunt tip. The setae are 
very tiny, inconspicuous (Fig. 13^), and dif- 
ficult to see. There appear to be three setae 
on each side located about 0.22 mm. from 
the apex of the piercer. The inversion mem- 
brane is 0.6 mm. wide at its broadest point. 
The scales of the rasper are small, very 
numerous, and blunt at apices; they extend 
all the distance to the apex and to within 
