FRUIT FLIES OF THE RYUKYU ISL.\XDS 



25 



brown, the apical third of R,, the ajncal jnargiii of K^ 

 and the anterior half of the apical margin of R.,, blackisli, 

 thus forming the I'ather narrow costal and anal stripes; 

 the remauiing portion of Rj yellowish brown, the basal 

 portion of R and the apical corner of the anal lobe, grey. 

 Only one row of bristles on R^+s, extending from base 

 to near middle of apical section; supernumerary lolie 

 rather small, with a few shaggy hairs; prolongation of 

 anal cell very long and longer than cell proper. 



Legs light yellow to yellow, hind tibiae sometimes 

 brownish, this coloration almost always gradually 

 paler toward tip. Front leg fpl. 9, fig. 14) 4/5 as long as 

 midleg; femur with approximately 20 black bristles on 

 thirsal surface, on externo-inferior margin two or three 

 longer bristly liaus along median one-thu'd and some 

 oblicjue pale yellow, very fine, long hairs on apical 

 one-third; tibia distinctly shorter than femur, covered 

 with blackisli-brown pubescence and furnished with 

 one brown spurlike ajjical bristle; tarsi about as long 

 as the tibia, first segment a little longer than tlie four 

 following together, tlie pubescence and the bristles on 

 the interno-inferior surface light yellow, the apical 

 bristles black. Midlegs (])1. 9, fig. 15) a little longer tluin 

 the hindlegs, rather slender; femur covered by a yellow- 

 isli pubescence, long whitish hau's about middle one- 

 tliii'd on externo-inferior margin; tibiae as long as femur, 

 slender and straight, covered by a brown pu1:>escence, 

 the apical sjjur black and a])])roximately one-thuxl as 

 long as first tarsal segment; tarsi distinctly shorter tliau 

 the til)ia, first segment slightly longer than the four 

 apical segments together, the jjubescence and the bristly 

 hau's on interno-inferior surface light yellow, the second 

 to fifth segments with a brown pubescence and witli 

 some black bristles along interno-ajjical margin. Hind- 

 legs (pi. 9, fig. 13): femora slightly curved, covered 

 with sparse brownisli pidjescence, many long light 

 yellow hairs, on apical half of dorsal sm-face, sparse 

 hairs of the same color occur ahmg inferior margins; 

 tibiae sliorter than the femur, hiferior margin nearly 

 straigiit, superior margin slightly convex, covered by 

 black pubescence, the brush-patch on the inside narrow, 

 rather hidistinct; tarsi nearly as long as tibia, tlie first 

 segment rather long, distinctly half as long as the tibia, 

 longer than tlie four following segments together, 

 ]iubescence and bristles as in midleg. 



Length: Body 4-7 mm, wing 3.8-6 mm. 



Female. — Palpi (pi. 9, fig. 8) broader than in male, 

 inferior margin strongly convex; second antennal seg- 

 ment (pi. 9, fig. 6) about half as long as third; basal 

 segment of ovipositor (])1. 9, fig. 11) yellowish brown or 

 reddish brown, covered with yellowisli pubescence, 

 moderate in size, distinctlv loneer than basal width. 



Length: Body (witiioul ovi[)osilor) 4.2-7 mm, wing 

 4-6 mm. 



Materlvl examined. — Many males and females 

 collected by the author at Iriomote (Dec. 29-Jan. 9), 

 Isiiigaki (Jan. 29-Feb. 24), and Okinawa (.Mar. 19- 

 Apr. .3), on the leaves of Paritium glabrum, Garcinia 

 spicata, Ficus eredn. Glchnia liftornlis, and others; a 

 few specimens from Kuinejima and Ainami-Oshima 

 collected by .Mr. K. Sato. 



Host. — Tomato. 



Strttniela ciiriirhilae (Coqiiillett) 



Dacus cucurbiiae CoquiUctt, 1899, p. 120. 



Chaetodacus cucnrbitac (Coquillett). — Shiniki, 1933, p. 73. 



A medium-sized, yellowish-brown to reddish-brown 

 si)ecies, distinguished by a large brown apical spot and 

 a distinct brown transverse spot on vein m-c, and 

 absence of the occipital row of bristles. 



Male and fealvle. — Head slightly narrower than 

 thorax, with relatively large eyes. Frons narrower than 

 one eye, scarcely widened anteriorlv, with straigiit 

 lateral margins, dirty yellow to light yellowish brcnMi, 

 with one small to large ill-defined brownish median 

 spot, tlie small brownish spots at roots of fronto- 

 orbital bristles almost always obsolete; pubescence 

 very sjiarse and yellowish, blackish and erect on median 

 ])ortion; vertical calli rather narrow and long, their 

 inner margins almost always jiarallel; fronto-orbitals 

 more or less elevated between the three inferior bristle.s; 

 lunule distinctly shining light brown to brown; ocellar 

 triangle small, nearly 1/4 as wide as frons, black or light 

 brown. Face waxy yellowish, with a pair of oval or 

 oblong black lateral s|)ots, comparatively narrow, 

 moderately widened below witii straight lateral margins 

 and witli a large median elevation; a transverse sulcus 

 just below this; antennal grooves rather narrow and 

 nearly the same width throughoul. their outer ridges 

 rather shar]) and somewhat tuiged with brown to bi-own- 

 ish; eye-margins narrow, covered willi a silvery white 

 tomenlum extending above to fronto-orl)itals. Back 

 of head moderately swollen, light brownisli yellow, 

 with marginal l)orders j^aler; ciicek ciimparalively 

 narrow and siiorl, with distinct genal gi'oove. almost 

 always brownish below lower angle of eye. All bristles 

 black; ocellars and postverticals wanting; three ])airs 

 inferior fronto-orbitals, lower two close togetlier; genal 

 sometimes yellowisli or brownish. Antenna light yellow 

 to light reddish yellow, tip usually darkened, not longer 

 than the face; first segment about as long as wide; 

 second segment about 1 Y^ times as long as basal, strongly 

 widened apically, nearly iK times as long as apical 

 width, without conspicuous median bristle; third seg- 



