130 
PACIFIC SCIENCE, Vol. V, April, 1951 
dacus. Asiadacus absonus Hering (1941) shows 
but a slight indication of a supernumerary 
lobe, and no distinct lobe is developed in 
Asiadacus calophylli Perkins and May. The 
males of these two species also lack the long 
shaggy pile along vein Cui+lst A and the 
spot of very densely placed microtrichia in 
the upper apical portion of the anal cell which 
is characteristic of species in those groups 
which have a well- developed supernumerary 
lobe. 
GENOTYPE: Dacus mesomelas Bezzi (syn, 
aethiopicus Munro) . 
KEY TO KNOWN PACIFIC AND ORIENTAL 
SPECIES OF Gymnodacus 
Crossveins r-m and m distinctly in- 
fuscated; costal band not contin- 
uous, interrupted in cell R 2 (Burma) 
absonus (Hering) 
Crossveins not infuscated; costal band 
rather broad, not interrupted (Aus- 
tralia) .... calophylli (Perkins and May) 
Dacus (Gymnodacus ) calophylli 
(Perkins and May) 
Fig. 6^/, b 
Asiadacus calophylli Perkins and May 1949- 
Univ. of Queensland, Dept. Biol. 2(14): 
16 - 18 . 
This is the only known Australian species 
of Gymnodacus. It is easily separated by the 
characters given in the above key. The fol- 
lowing are the more important characteristics. 
MALE. Head: The front is about two times 
longer than wide and is not distinctly spotted 
on the sides. Two pairs of inferior fronto- 
orbital bristles are present. The third antennal 
segment is brownish and is comparatively 
short. It is just slightly longer than the face 
and only three times longer than wide. The 
facial spots are comparatively inconspicuous, 
small, and elongate in shape. The spots are 
brownish-black and are about three times 
longer than wide. Thorax'. Mesonotum largely 
black, with the usual yellow markings; a spot 
just inside each humerus is reddish. The 
scutellum is yellow except for a very narrow 
black line across its base. The yellow vertical 
stripe on the mesopleura expands broadly on 
the dorsal half of the sclerite and extends 
anteriorly to a point opposite the anterior 
notopleural bristle. Legs: Yellow to rufous 
except for the brownish hind tibiae. Wings\ 
The first two costal cells are hyaline to faintly 
yellowish-fumose and are nearly devoid of 
microtrichia except in the apical half of the 
second cell. The costal band is rather broad 
and fills nearly all of cell R3. The cubital 
streak is not well developed, does not extend 
past the apex of the cubital cell, and is con- 
fined inside the cubital cell except for a small 
portion in the base of cell M4. The narrowed 
portion of the cubital cell is very short, being 
only about three-fourths as long as the dis- 
tance from the apex of the cell to the wing 
margin. There are no long shaggy hairs along 
vein Cui+lst A as are present in males which 
have a well- developed supernumerary lobe, 
and no distinct lobe is present at the apex of 
vein Cui+lst A; just a slight undulation is 
present in the wing margin. Abdomen'. Per- 
kins and May (1949) said the abdomen is 
"almost entirely dark brown to black except 
for median portion of fourth and fifth tergites 
which may be fulvo-ferrugineus.” In the 
large series of specimens at hand the abdomen 
is predominantly rufous. The third tergum 
has a broad black basal band; a median black 
vitta extends through the third to fifth terga. 
A subbasal black band is present on the 
second tergum, and the first is brown to 
black on its basal half. 
Length'. Body, 5. 0-5. 5 mm.; wings, 4.5- 
5.0 mm. 
FEMALE. In Perkins and May’s figure 
( 1949 : 18) the narrowed portion of the cubi- 
tal cell is shown as being longer than the 
distance to the wing margin beyond the apex. 
In the specimens at hand this latter distance 
is one and one-third greater than the length 
of the narrowed portion of the cubital cell. 
Ovipositor. In in situ specimens it is short and 
inconspicuous; the visible portion is not as 
long as the fifth tergum. The extended ovi- 
