FRUIT FLIES OF THE RYUKYU ISLANDS 



17 



Legs rathei- bright yellow, cumi)ar!i lively short. 

 Front legs (pi. 6, fig. lOj shortest; femora distinctly 

 but gradually narrowed toward apex and rather sud- 

 deidy narrowed at the basal one-third, witli a small 

 ill-defined brownish to blackish externo-inferior oblong 

 spot before apex, many but sparse black bristly haii's 

 throughout on dorsal surface; tibia distinctly shorter 

 than fenuu-, relatively narrow, the basal half narrowed 

 toward base, some blunt yellowish-brown bristly haii's 

 at ventral apex, similar but shorter ones standing 

 bruslilike along the interno-ajncal margin, the surface 

 covered witli sliort blackisli pubescence which becomes 

 a little longer on the dorsal surface and paler on the 

 interior surface; tarsus slightly shorter tiuin tibia, 

 (•oni|)aratively broad, tlie four ajjical segments darker, 

 the first segment nearly as long as the following seg- 

 ments together, the pubescence on the ventral surface 

 yellowish, blunt, iMushlike, becoming longer toward 

 base, intermixed with a few black ones, pubescence on 

 dorsal surface and at apex mostly black, the fourth 

 segment shortest. Midlegs (\A. 6, fig. 9) longer than 

 other legs; femora sliglitly lu'oadened at about middle, 

 apical half of externoventral surface black, ]iubescence 

 yellowish, a few scattered, longer hairs on A-entral 

 surface; tibia as long as fenuu-, straiglit, basal tiiii'd 

 narrowed toward the base, the black apical spur as long 

 as apical width, a few short bristles around the spur, 

 ])ubescence mostly Ijlackish ; tarsus about 2/3 as long 

 as tibia, rather slender, tlie first segment whitish, 

 slender, nuu-h longer than Ihe four following segments 

 together, covered with yellowisli |)nbescence, setae on 

 the ventral surface l)lunt and lirusldike. long but 

 gradually sliortened apically, with some black setae 

 about the a]5ex. the four apical segments mostly black 

 pul)escent. Hindleg (pi. 6, tig. 11) witli blackisii-brown 

 coxa and trochanter: femur very slightly curved, 

 somewhat narrowed toward base and apex, with a 

 distinct blackish ill-defined preapical spot on tlie 

 ventral surface before the ai)ex, the pubescence mostly 

 yellowish and on the dorsal surface of apical iuilf 

 conspicuously long and rather sparse; tibia distinctly 

 shorter than femur, distinctly narrowed at about the 

 basal one-fourth, brownisli jmbescent. a|ncal third or 

 half brownish; tarsus a little shorter than tibia, tlie 

 first segment whitish, disthictly longer than the four 

 following segments togethei', with a yellowish pubes- 

 cence on the ventral surface as on first tarsal segment of 

 midlegs, but more sparse, the four apical segments 

 somewhat brownish and mostly black pubescent, 

 ventral surface furnished with a few blunt black bristles. 



Length: Body 6.5-9 mm, whigs 5.5-8.5 mm. 



Fem.\le. — Quite similar to the male (pi. 6, fig. 13). 

 Ovipositor very short, reddish yellow or 3-ellowish 



brown, the basal segment consi)icuously depressed, 

 nearly as long as the fifth abdominal tergnm but when 

 seen from the dorsum distinctly shorter, yellowish 

 pubescent ; the shining spots on fifth abdominal tergum 

 larger but inconspicuous. 



Length: Body 6.2-9.3 mm (without ovii>ositor), 

 wings 5.5-8 mm. 



Rem.\rks. — Many males and females collected in 

 Iriomote and Ishigaki Islands, fidin December 31, to 

 February 23, 1953, on the leaves of (nlophyllum 

 inophyllum, Garcinia spicata, FicuH fachikoogi, and 

 Glehnia liUo?-alis, and also a few in Miyako (one male 

 and one female, in March) and Okinawa (one male, 

 March 27) Islands; observed that the females oviposit 

 in the fruits of Garcinia spicata. 



Genus Zeiigodacus Hendel 



Daciis (Zeugodacns) Hendel, 1927, pp. 2.t, 26 (as subgenus). 



Zeugodacus srntelhitus (Hendel) 



Plate 7 



Dacus srutellatus Hendel, 1912a, p. 20, pi. 1, tig. 4. 

 Dacus Irivittatus Walker. — Matsumura, liUfi, p. 411, pi. 23, fig. 9. 

 Dacus hezzii Miyake, 1919, p. 146, pi. 2, fig. 2, pi. 10, fig. 2. 

 Zeugodacus scutellatus (Hendel). — Shiraki, 1933, pp. 79, 82. 



A small to medium-sized, blackish species; distin- 

 guished by tlie four black transversal bands on the 

 abdominal tergites, the three pairs of subecjuidistant 

 browii to black latez-al spots on the frons, the oblong 

 black brush-patch on the a]iico-internal surface of the 

 hind tibiae, the three uarniw yellowish postsutvn-al 

 calli, and the conspicuous black a|)ical sjxit of the 

 scutellum. 



M.\LE. — Head distinctly narrower than thoi-ax, 

 1 to 1 .7 times as long as wide or a lit tie higlier than long. 

 Frons (pi. 7, fig. 3) distinctly narrower than eye, very 

 slightly widened forward, with straight lateral margins, 

 nearly flat, lemon yellow to dh'ty yellow, with three 

 ])aii's of brownish to blackish lateral spots, of which 

 the middle pair is distinctly nearer to the npi)er than 

 to the lower pair, rather large brownish to blackish 

 subquadrate spot, distinctly blackish pubescent ui the 

 middle; in some specimens frons nearly uniformly 

 colored, without sjiols; lunulc narrow and small, 

 shining black to castaneous brown; vertex with one 

 pair of black or dark brown obli(|ue-transverse lateral 

 sjiots and the rather small black ocellar triangle, tlie 

 former is sometimes connecteil with the ocellar spot; 

 vertical calli more or less distinct, but rather small, 

 shining. Face (])!. 7, fig. 4) distinctly shorter than wide, 

 with straight lateral margins, light waxy yellow, with 

 a pair of rather small, round, blac'k lateral s])ots not 



