Studies in Fruit Flies. Part 1. Dacini — HARDY AND AdaCHI 
201 
apical subsegments of the tarsi. The front 
femora each have a pair of strong black spines 
on the outer ventral surface near the apex. 
Abdomen: Very distinctly club-shaped, the 
first two segments are narrow and parallel 
sided and are just half as wide as the remain- 
ing segments. The first ter gum is largely yel- 
low with the apical portion brown to blackish. 
The second tergum is yellow except for a 
brown longitudinal band down the middle 
which connects with a broad transverse band 
near the apex of the segment forming a T- 
Terga three and four have brown to black 
bases and yellow apices. The fifth narrows ' 
rather abruptly into an acute point at its apex, 
it is yellow in the middle and at the apex and 
black on the sides and in the middle of the 
anterior margin. The venter is chiefly brown- 
ish. The third tergum is not ciliated. The 
genitalia have not been studied. 
Length: Body, 9-5-10.0 mm.; wings, 8.6mm. 
FEMALE. Similar to the male except for 
sexual characters. The costal band is not so 
distinctly yellowed as in the male in the spec- 
imens at hand. The ovipositor is rather short 
(Fig. 30/), about 3-5 mm. long. The piercer 
is slender beyond the basal portion and is 
1.20 mm. long by 0.07 mm. wide at the 
oviduct and 0.25 mm. wide at the base. The 
opening of the oviduct is about 0.42 mm. 
from the apex of the piercer. The flaps over 
the top of the egg channel are very conspicu- 
ous, they extend about two thirds the length 
of the segment and are on the dorsal surface 
of the piercer. There are four pairs of sub- 
apical setae on the piercer; the basal two pairs 
are tiny, scarcely one third as long as the 
apical setae. The apical two pairs are com- 
paratively strong and extend almost as far as 
the tip of the piercer. The distance from the 
bases of the apical set of setae to the tip of 
the piercer is about 1.5 times greater than the 
length of the plate bearing the setae (Fig. 
30g) . The piercer is slightly flattened laterally 
and has a distinct convexity on the dorsal 
surface just below the middle. The rasper 
(eighth segment) is 1.30 mm. long, the in- 
dividual spicules are sharp pointed (Fig. 30/) 
and extend to about 0.38 mm. from the base 
of the segment. 
TYPE LOCALITY: Los Banos, P. I., reared 
from citrus. 
Type in the U. S. National Museum. 
The writers have studied specimens from 
the type locality (Baker); from Manila, Phil- 
ippine Islands, ex lime (C auranti folia) , Feb. 
15, 1929 (A. M. M.), and Tagoloan, Min- 
danao, Philippine Islands, June, 1950 (F. E. 
Skinner) . 
SPECIES OF DOUBTFUL POSITION 
Dacus ahsolutus Walker, 1862, Linn. Soc. Lon- 
don, Proc. 4: 22. 
This species cannot be positively placed 
subgenerically as it is known only from the 
type female. However, with the additional in- 
formation supplied by Dr. K. L. Knight, we 
feel that it may possibly be a Neodacus. He 
noted that it is larger than dorsalis and has the 
following characteristics: Anterior supraalars 
present; one pair of scutellar bristles; face 
spotted as in dorsalis; no median scutal stripe; 
wing with only very slight shading on first 
longitudinal vein, no other shading; scutellum 
all one color; yellow of humerus broken be- 
fore the suture; a black transverse area on the 
second abdominal tergum as well as on the 
third. 
Length: Body, "6 lines.” 
TYPE LOCALITY: Ceram. 
Type in the British Museum. 
Dacus areolatus Walker, 1861, Linn. Soc. Lon- 
don, Proc. 5: 295. 
This species is a true Dacus s. 1. according 
to Bezzi ( 1913 : 67). Walker described it as 
having four black spots on the face in his 
latin description and as having two black 
spots in his English description. It is yellow 
brown; the mesonotum has two black stripes 
with two postsutural yellow vittae. The scu- 
tellum is yellow. The abdomen is short, not 
longer than the mesonotum, with a slender. 
