Studies in Fruit Flies. Part I. Dacini — HARDY AND AdaCHI 
197 
Fig. 29. Dacus {Zeugodacus) trimaculatus n. sp. a, Mesonotum; b, front view of head; c, wing; d, apex of piercer; 
extended ovipositor. 
of the orbital bristles. There are usually two 
pairs of inferior fronto-orbital bristles present; 
sometimes three pairs are present. There is 
one pair of superior fronto-orbitals. The face 
has a transverse brown to black spot in the 
median portion which extends almost to the 
large black spots in the antennal furrows (Fig. 
29 ^). The third antennal segment is brown 
to blackish and is slightly longer than the 
face. The occiput is chiefly yellow to rufous; 
the hind portion is brownish colored in some 
specimens. Thorax: Predominantly black on 
the dorsum with three broad, postsutural yel- 
low vittae. The anterior portion of the thorax, 
between the humeri, is rufous. The meso- 
notum is covered with gray pollen; this is 
interrupted from the anterior end of the me- 
dian yellow vitta to the anterior margin by a 
fine black vitta (Fig, 29^). The yellow mark 
on the upper portion of each sternopleuron 
is as broad or broader than the upper portion 
of the yellow transverse stripe on the meso- 
pleura. The scutellum is largely yellow with 
a rather small black spot in the median por- 
tion between the anterior pair of bristles. 
Legs: The femora are entirely yellow except 
for slight brownish discolorations on the 
dorsoapical portion of the front pair. The 
tibiae are brown to black. The tarsi are yellow 
except for the brownish apical subsegments. 
Wings: The costal band is moderately narrow 
and does not extend beyond the apex of vein 
R4+5. The r-m crossvein is curved, is about 
0.75 as long as the section of M 1+2 between 
the r-m and the m crossveins, and is dis- 
tinctly longer than the basal section of vein 
M3+4. The m crossvein is also distinctly curved. 
The attenuated portion of the cubital cell is 
just slightly longer than that portion from the 
apex of the cell to the wing margin (Fig. 29c) . 
Abdomen: The first and third terga have com- 
plete bands of black across their base; the 
second tergum has a large black spot in the 
median portion which extends transversely 
across the segment but does not attain the 
lateral margins; it is interrupted by rufous 
coloration toward the sides. A black vitta ex- 
tends longitudinally down the median por- 
