Studies in Fruit Flies. Part I. Dacini — Hardy and Adachi 
185 
long. The basal segment is 1.8 mm. long by 
1.2 mm. wide at its broadest point. The in- 
version membrane measures approximately 
2.8 mm. by 0.36 mm. The rasper extends to 
within 0.88 mm. of the base of the segment. 
The piercer is about 2.1 mm. long by 0.21 
mm. wide at its widest point. The tip of the 
oviduct is very near the apex of the piercer; 
it extends to the proximal pair of setae or 
about 0.05 mm. from the apex of the piercer. 
The two distal pairs of setae are much strong- 
er than the proximal pair and extend to or 
beyond the tip of the piercer. The apex of the 
piercer is characteristically rounded (Fig. 22c). 
TYPE locality: Sumatra. 
Type in the Zoologisk Museum, Copen- 
hagen. 
A large series of specimens are in the pres- 
ent collection from the following localities 
and hosts. 
Malaya: Kuala Lumpur, Feb., 1948-Feb., 
1949 , ex Artocarpus polyphema and A. integri- 
folia and in citronella traps (N. L. H. Krauss) ; 
Malacca, Feb., 1949 (no host) (Krauss); Ser- 
dang, Selangor, June, 1948, ex Artocarpus 
integrifolia (Krauss) . 
Philippine Islands: Mintal, Mindanao, Feb., 
1950 , ex jakfruit (F. E. Skinner); Dumaguete 
City, Negros Oriental Prov., Apr., 1950, ex 
jakfruit (F. E. Skinner); Los Banos, July, 1921 
(F. X. Williams and F. C. Hadden). 
Borneo: Tamparuli, Jan.-Aug., 1951, ex 
Momordica charantia and Artocarpus Integra 
and trapped by methyl eugenol bait (G. 
Angalet and F. E. Skinner). 
The following parasites were reared from 
this species: from Malaya — Optus sp..^, Ta- 
chinaephagus spp.?, Tryhliographa dad Weld, 
Pseudeucoila sp..^, and Palinothrix sp..^; from 
Borneo — 0. angaleti Fullaway. 
Dacus (Zeugodacus) Hendel 
Dacus {Zeugodacus) Hendel, 1927, in Lindner, 
Die Fliegen der Palaeark. Reg. 49, Trypeti- 
dae: 26. 
Zeugodacus Hendel, Shiraki, 1933, Taihoku 
Imp. Univ., Faculty Sci. and Agr., Mem. 
8, Ent. 2: 78. 
Zeugodacus Hendel, Perkins, 1937, Roy. Soc. 
Queensland, Proc. 48(9): 55, and 1938, 
49(11): 137. 
This subgenus is differentiated from Dacus 
{Strumeta) only by the presence of four scutel- 
lar bristles rather than two. 
GENOTYPE : Dacus {Zeugodacus) caudatus 
Fabricius. 
KEY TO SPECIES OF DaCUS (ZeUGODACUS) 
1. Two postsutural yellow vittae on meso- 
notum 2 
Three postsutural yellow vittae on meso- 
notum 3 
2. Faceblack. (Celebes) . . terminiferWalker 
Face yellow, with the usual black spots 
in antennal furrows. (Malaya)' 
pendleburyi (Perkins) 
3. Wings hyaline, except for costal band 
and cubital streak (except possibly for 
a brownish spot at apex of vein M3+4) 
6 
The m crossvein infuscated . 4 
4. Face entirely yellow. Front femora chiefly 
reddish brown. Anterior median portion 
of mesonotum black. (Philippine Is- 
lands) .mundus (Bezzi) 
Face with the usual black spots. Front 
femora chiefly or entirely yellow to ruf- 
ous. Anterior median portion of meso- 
notum brownish red 5 
5. Costal band greatly enlarged apically, 
entire apical fourth of wing, through cell 
M 2 , infuscated; infuscation continuing 
over m crossvein and extending basad 
along vein M3+4. (Celebes) 
emittens Walker 
Costal band not so enlarged and not con- 
tiguous with infuscation on m cross vein 
