Studies in Fruit Flies. Part 1. Dacini — Hardy AND AdaCHI 
153 
The exact position of these wasp-like flies 
is unknown, but the group may possibly be 
a subgenus of Callantra. Enderlein’s brief de- 
scription states that the abdominal segments 
are as long as wide, the abdomen is slightly 
less attenuated (stalked) than in Callantra and 
not swollen, globose ("Kugelig angeschwol- 
len”). The first antennal segment is as long 
as wide and the second is about 2.5 times 
as long as wide, otherwise as in Callantra. 
This brief definition does not fit Polistoml- 
metes satisfactorily within our concept of Cal- 
lantra. This may possibly be a Dacus related 
to the sub genus Neodacus Perkins. Hering 
(1941: 2 ) included it under Callantra in his 
key. 
genotype: Polistomimetes minax Enderlein. 
KEY TO ALL KNOWN SPECIES OF 
Callantra.^ (Polistomimetes) 
1 . Head and thorax clear yellow, face un- 
marked. Costal band yellow except for a 
dark-brown spot at apex of vein R 3 . Cell R 3 
not narrowed in apical portion. Third ter- 
gum of abdomen with a poorly developed, 
faint, median longitudinal vitta. Basal half 
of ovipositor strongly swollen (ellipsoid). 
(India) minax (Enderlein) 
Front margin of face black. Costal band 
brown in apical half of costal cell (cell R 2 ) 
and through apex of wing; band expanded 
at apex, extending to upper portion of m 
crossvein, through apical third of cell M 2 . 
Cell R 3 strongly narrowed in apical third. 
Terga three to five with a broad black 
median vitta. Ovipositor base not swollen, 
straight sided. (Sumatra) 
infestus (Enderlein) 
Callantra? (Polistomimetes) infestus 
(Enderlein) 
Polistomimetes infestus Enderlein, 1920 , Zool. 
Jahrb. Syst. 43: 359. 
This is distinguished from the only other 
known species in this group by the characters 
given in the key. 
Length: Body, 9-0 mm.; wings, 8.0 mm. 
TYPE locality: Deli, Sumatra. 
Type possibly in the Museum f. Natur- 
kunde, Stettin. 
We have not seen this species. 
Dacus (Daculus) Speiser 
Daculus Speiser, 1924, Beitr. Tierk. Konigs- 
berg, 140. 
This subgenus differs from D. {Strumeta) 
by lacking prescutellar and anterior supraalar 
bristles. It has not been recorded from the 
area covered in this report, but on the evidence 
we now have it appears that Dacus discipennis 
Walker (from Moluccas) probably belongs 
here. 
genotype: Dacus oleae (Gmelin). 
Dacus (Daculus) discipennis 
Walker, n. comb. 
Dacus discipennis Walker, 1861, Linn. Soc. 
London, Proc. 5: 294. 
This species appears to be very close to 
D. (Daculus) murra^i (Perkins) from Australia; 
both have broad costal bands and cubital 
streaks in the wings, the band fills all of cell 
R3. The only difference which we can find, 
from the original description of discipennis, is 
that the mesonotum is all black except for 
the two postsutural yellow vittae. In murrayi 
the mesonotum is chiefly rufous with a faint 
tinge of brown in the ground color; it is 
obviously a much paler species. 
Dr. K. L. Knight examined a specimen of 
discipennis in the British Museum and supplied 
enough details for us to place it under Daculus. 
He confirmed that the prescutellar and an- 
terior supraalar bristles are lacking and that 
the third abdominal segment of the male has 
cilia on the sides. 
TYPE locality: Batchian, Moluccas. 
Dr. Knight said the type (female) was not 
in the British Museum ("at least not labeled 
so”). One male specimen "labeled discipennis 
