Studies in Fruit Flies. Part I. Dacini — Hardy and Adachi 
157 
extends to the front margin of the mesonotum 
(Fig. 3^) . The mesonotum and scutellum are 
densely covered with moderately long yellow 
pile. JFmgs/ As in Figure 3^. The costal cells 
and the radial cell are entirely yellow, the 
second section of the costa is densely covered 
with microtrichia. Cell M is slightly yellowish, 
especially around its margins. The narrowed 
portion of the cubital cell is about 1.25 times 
as long as that portion from the apex of the 
cell to the wing margin. Abdomen: Almost all 
rufous with a rather faint brown vitta extend- 
ing longitudinally over the median portion 
of terga three to six. Ovipositor: The basal 
segment, in situ, is about equal in length to 
the fifth abdominal segment, as viewed from 
above. The extended ovipositor (Fig. 3^) is 
about 6.63 mm. long. The piercer is about 
2.08 mm. long by 0.26 mm. wide at its widest 
point. The apex is rather blunt, and two pairs 
of long and two pairs of short preapical setae 
are present; the elongate pair are situated 
about 0.025 mm. from the apex (Fig. 3c). The 
opening of the oviduct is situated about 0.26 
mm. from the apex. The inversion membrane 
measures about 2.47 mm. by 0.47 mm. at its 
widest point. The rasper extends to within 
about 1.35 mm. from the base of the segment. 
The basal segment (seventh) is 2.08 mm. long 
by 1.56 mm. wide at its widest point. The 
spiracles are situated about 0.4 mm. from the 
anterior corners of the segment. 
Length: Body, 10.0-11.0 mm.; wings, 
9.0 mm. 
TYPE locality: Gilolo. 
The type was not designated and is prob- 
ably the female specimen mentioned by Per- 
kins {loc. cit.) which is in the Australian 
National Museum, Melbourne; this had been 
labeled, by Walker, ''Dacus implexusL The 
single specimen in the British Museum is a 
male; Walker’s description was based upon 
a female. 
The female specimen described above is 
labeled "Halamaheira, T. Barbour.” 
Dacus (Paratribacus) Shiraki 
Paratridacus Shiraki, 1933, Taihoku Imp. 
Univ., Faculty Sci. and Agr., Mem. 8(2): 
109 - 110 . 
Dacus {Paratridacus) Shiraki, Hardy, 1951, 
Pacific Sci. 5: 140. 
This subgenus is differentiated from Dacus 
{Zeugodacus), only by secondary sexual char- 
acters in the males; the males lack the row of 
cilia on each side of the third abdominal 
tergum and the supernumerary lobe in the 
wing. 
genotype: Dacus {Paratridacus) expandens 
Walker. 
Dacus (Paratridacus) expandens 
Walker 
Dacus expandens W Aker, 1859, Linn. Soc. Lon- 
don, Proc. 3: 114. 
Bactrocera garciniae Bezzi, 1913, Indian Mus., 
Mem. 3: 97. 
Dacus yayeyamanus Matsumura, 1916, Thou- 
sand Ins. of Japan, Addit. 2: 412. 
This species has been adequately described 
and figured by Hardy (1951: 140-142). 
TYPE locality: ”Aru Islands” (Aroe Is- 
lands). 
Type in the British Museum (Natural 
History). 
A series of typical expandens are on hand 
from the following localities. Philippine Is- 
lands: Luzon, Sept.-Oct., 1947 (Q. C. Chock) ; 
Bataan, Oct., 1947 (L. T. Karganilla). 
Dacus (Paratridacus) expandens melanius 
n. subsp. 
Fig. 4 
The specimens which we have seen from 
Malaya are consistently darker in color than 
are the typical D. expandens. The subspecies 
melanius is distinguished by having the meso- 
notum extensively blackened. In the fully 
hardened (colored) specimens the area be- 
tween the lateral yellow vittae is entirely black, 
except for a brief interruption, just behind 
