140 
PACIFIC SCIENCE, Vol. V, April, 1951 
mm. long. The piercer (Fig. 9b) is about 
0.16 mm. wide and the eighth segment is 
0.25 mm. wide. The oviduct opens at the 
apical two-thirds of the piercer, about 0.3 mm. 
from the apex. The setae are very tiny and 
inconspicuous; they are about 0.06 mm. from 
the tip of the piercer. The scales of the rasper 
are blunt and extend to the base of the eighth 
segment. The basal segment of the ovipositor 
is about 1.1 mm. long by 0.9 mm. wide; the 
spiracles are about 0.28 mm. from the base of 
the segment. 
TYPE locality: Cleveland, South Queens- 
land, ex Symplocos thwaitesii F.v.M. 
Type in the Queensland Museum. 
One female specimen was sent in by Mr. 
Krauss labeled "in trap, St. Ives, near Sydney, 
Oct. 29, 1941.” (Collector not given.) 
Dacus (Paratridacus) Shiraki 
Paratridacus Shiraki 1933. Fac. Sci. Agr., 
Taihoku Imp. Univ., Mem. 8(2): 109-110. 
This subgenus is closely related to Dacus 
{Zeugodacus) and is distinguished only by 
secondary sexual characters. The males differ 
by having no cilia on the third abdominal 
tergum and. no supernumerary lobe in the 
wing. The group apparently contains but one 
species; it is widely distributed and quite 
variable in coloration. 
GENOTYPE: Dacus {Paratridacus) expandens 
Walker. 
Dacus (Paratridacus) expandens Walker 
Fig. 10^?, b 
Dacus expandens Walker 1859. Linn. Soc. 
Lond., Proc. 3: 114. 
Bactrocera garciniae Bezzi 1913. Ind. Mus. 
Mem. 3: 97-98. New synonymy based up- 
on a large series of specimens from a wide 
range of localities and upon a comparison 
of specimens with the type in the British 
Museum. 
Dacus yayeyamanus Matsumura 1916. Thou- 
sand Insects of Japan, Addit. 2: 412. New 
synonymy based upon a comparison of 
specimens from Japan with specimens from 
numerous other areas. 
This is a moderately large, chiefly pale- 
colored species which is distinguished from 
all known Dacinae by the subgeneric charac- 
ters stated above. The females are also dis- 
tinctive because of their peculiarly developed 
ovipositor (Fig. 10^). The coloration is ap- 
parently quite variable and does not appear to 
be reliable as a specific character. The speci- 
mens on hand from Australia are quite con- 
sistently pale colored. None in the series at 
hand has black markings on the mesonotum, 
and the abdomen and legs are not as distinctly 
marked with black as in specimens from the 
Philippines, Japan, and some other regions. 
MALE. The front is nearly one and three- 
fourths times longer than broad and is slightly 
discolored with brown in the median part at 
the bases of the bristles. There are normally 
two pairs of inferior fronto-orbital bristles; 
one specimen at hand has four well-developed 
inferior fronto-orbitals on one side of the 
face and two on the other. The facial spots 
vary in size and shape from small and circular 
to rather large oval to subquadrate. The third 
antennal segment is brown, one and one- 
third times longer than the face, and nearly 
five times longer than wide. Thorax: Typi- 
cally rufous, except for the two yellow post- 
sutural stripes, yellow humeri, and the usual 
yellow markings. The scutellum is normally 
yellow but is discolored with reddish in some 
specimens. The mesonotum often has brown 
to blackish submedian vittae extending longi- 
tudinally before and behind the suture. The 
pleura are usually all pale, but in some speci- 
mens the sternopleura, hypopleura, ptero- 
pleura, and the front margin of the meso- 
pleura are extensively black. The metanotum 
varies from yellow to rufous in the center 
and from brown to black on the sides. 
Legs: Varying in coloration from all reddish 
to yellow, except for brownish coxae and 
apical subsegments of tarsi, to having a 
