162 
PACIFIC SCIENCE, Vol. V, April, 1951 
and thick; it is not broad, however, as in 
hreviaculeus (cf. Figs. 12i^ and 20a). In undis- 
sected specimens the extended portion is 
equal to or slightly longer than segment 5 and 
not scarcely extended beyond segment 5 as 
in hreviaculeus. The extended ovipositor (Fig. 
20a) measures approximately 3.5 to 3.7 mm. 
The piercer is 1.1 to 1.2 mm. long by about 
0.26 mm. at its widest point. The oviduct 
extends to within about 0.18 mm. from the 
apex of the piercer (Fig. 20h), and the setae 
are about 0.05 mm. from the apex; this latter 
distance is comparable to about two times 
the length of the plate bearing the setae. On 
each side of the base of the piercer a pair of 
sclerotized lobes extends a short way inside 
the apical portion of the inversion membrane 
(segment 8). The inversion membrane meas- 
ures 1.2 to 1.4 mm. in length by about 0.38 
mm. at its widest point (at the base). The 
scales are thorn-like and extend to within 
about 0.2 mm. of the base of the segment. 
The apical portion of the inversion membrane 
is densely covered with short hairs, especially 
visible on the sides. The basal segment of the 
ovipositor is about 1.2-1. 3 mm. long by 
1.1 mm. across its hind margin. The spiracles 
are located about 0.3 mm. from the posterior 
lateral margins of the segment. 
TYPE locality; Cairns, Queensland, bred 
ex Sideroxylon ohovatum (R. Br.). 
Type in the University of Queensland col- 
lection. 
Dacus (Strumeta ) musae (Tryou) 
Fig. 21^-c 
Chaetodacus musae Tryon 1927. Roy. Soc. 
Queensland, Proc. 38(14): 197-199. 
This species is related to D. endiandriae 
(Perkins and May). It is distinguished by the 
pale-colored abdomen which lacks the central 
black vitta and by the striking differences in 
the female ovipositors (Figs. 15^ and 21^). 
MALE. Head: All rufous, except for the 
black facial spots and ocellar triangle and for 
the brownish discoloration in the center of 
the front. The front is slightly expanded on 
the lower half and is one and three-fourths 
times longer than wide. Two pairs of inferior 
fronto-orbital bristles are present. The facial 
spots are oval and are situated about half their 
length from the oral margin. The third an- 
tennal segment is brownish, about one and 
one-fourth times longer than the face, and is 
slightly more than four times longer than 
wide. The head bristles are brown to black. 
Thorax: The dorsum is chiefly black, especial- 
ly in the median portion. The area between 
the postsutural yellow stripes is grayish pube- 
scent and is divided off by the usual three 
longitudinal subshining lines. The scutellum 
is all yellow except for a very narrow brown 
line across its base. The vertical yellow stripe 
through each mesopleuron is expanded 
dorsally and extends over all but a small por- 
tion of the top margin of the sclerite. The 
metanotum is black with a reddish central 
portion. Legs: Entirely rufous except for some 
brownish discoloration on the coxae and hind 
tibiae. Wings: The first two costal cells are 
hyaline and devoid of microtrichia except in 
the outer part of the second cell. The costal 
band is rather broad but does not extend to 
vein R4+5 except at its apex (Fig. 21^). The 
cubital streak is broad, fills all of the base of 
cell M4, and extends about halfway along the 
m-cu cross vein. The narrowed portion of the 
cubital cell is three times longer than the dis- 
tance from the apex to the wing margin. 
Abdomen: Almost all yellowish to rufous. The 
first tergum is brownish, especially on the 
sides, and the second tergum has a reddish- 
brown subbasal band. The third tergum 
usually has a narrow, black basal band, dis- 
tinct especially at the sides. In some speci- 
mens this tergum is all pale, in others just a 
small anterior lateral spot of black is present 
on each side. 
Length: Body, 7.0-7. 3 mm.; wings, 6.0- 
6.2 mm. 
FEMALE. The narrowed portion of the cu- 
bital cell is two times longer than the section 
to the margin beyond the apex. Some speci- 
mens have a very faint indication of a vitta 
