FRUIT FLIES OF THE RYUKYU ISLANDS 



65 



Legs uiiifDrmly liglit yellowish Ijiown. brownish 

 pubescent. Foreleg (pi. 24, fig. 10) conspicuously 

 shorter than others: femur distinctly narrowed toward 

 both ends, dorsal surface with two rows of long yellow- 

 ish bristles, of which tlie apical bristles are very 

 sparse, e.xternoventral margin with about four brown- 

 ish bristly hairs on apical half; tibia a little shorter 

 than femur, less than twice as long as first tarsal 

 segment, latter with yellowish brushlLke bristles on 

 internoventral surface, with two consjiicuouslj^ long 

 yellowish bristles just before middle of the externo- 

 ventral margin. Midleg (pi. 24, fig. 11) longest and 

 rather slender: femur as long as tibia, no distinct 

 setae; tibia with a long black apical spur one-thii'd as 

 long as first tarsal segment; latter nearly haK as long 

 as tibia, comparatively slender, brushlike bristles on 

 internoventral surface yellowish, rather short. Hind- 

 leg (pi. 24, fig. 12) comparatively strong; femur a 

 little longer than tibia, apical third of externoventral 

 margin with brown short bristly hairs; tibia as long 

 as first tarsal segment, ventral apex with a short black 

 spurlike bristle; first tarsal segment gradually but 

 very slightly narrowed toward apex, brushlike bristles 

 on the venter as in midtarsus. 



Length: Body (without ovipositor) 3.2-3.8 mm., 

 wing 4-4.3 mm. 



Types.— Holotype, 9, USNM 69379; paratypes, 

 9 (USNM) ; 5 9 (NIAS) ; all collected by Mr. K.^ Ilia, 

 at Yogi, Okhuiwa Ts., Sept. 23 and Oct. 1, 1954. 



Genus Spathitlina Rondani 



Spalhulina Rondani, 18.56, p. 113.— Shiraki, 1933, p. 430. 

 Dilricha Rondani, 1871, p. 163. 



Spathitlina arroleiica (Schiiier) 



Plate 25 



Tephrilis acroleuca Schiner, 1868, p. 368. 

 Oxyna parca Bezzi, 1913, p. 1.56, pi. 10, fig. 62. 

 Euribia parca (Bezzi). — Hendel, 1915, p. 465. 

 Spathulina acroleuca (Schiner). — Shiraki, 1933, p. 431. 



A small dark species with yellowish legs and com- 

 paratively narrow black wings which are distinctly 

 whitish at the base and jjossess whitish well-defined 

 spots. 



M.\LE. — Head almost always very sliglitly wider than 

 tliorax, 1.6 times as wide as long, fully 1.2 times as 

 wide as high. Frons (pi. 25, fig. 3) twice as wide as 

 one eye, slightly but disthictly narrowed forward, flat, 

 yellow to reddisli yellow, more or less darkened on 

 |)osterior half, with narrow orbits distinct!}' whitish 

 tomentose and white pubescent; lunula comparatively 

 large, moderately whitish tomentose; vertical calli 



comparatively small hut distinct, nearly one-thii-d as 

 long as frons, more or less whitish tomentose; ocellar 

 triangle moderate in size, blackish, a rather distinct 

 transver.se carina througliout the vertex, near inner 

 posterior corners of the eyes with an ill-defined blackish 

 spot. Face (pi. 25, fig. 4) almost flat, but inferior third 

 disthictly produced forward, conspicuously broader 

 than long, somewhat waxy yellow , obscured by a grej'ish 

 tomentum; orbits very narrow, distinctly whitish to- 

 mentose; antennal grooves very shallow, not distmct; 

 vibrissal edges very slightly carinate, with very short 

 black bristly setae. Back of head (pi. 25, fig. 2) flat 

 above and swollen below, light yellow, with u|)j)er half, 

 excepting eye-margms, blackish, whitish tomentose; 

 cheeks narrow, oral margin with yellowish bristly hairs 

 l)eliind genal bristle. Eyes comparatively large, in 

 lirofile moderately oblique, nearly 1.4 times as long as 

 wide, with posterior margin moderately and anterior 

 margin strongly convex, superior angle distinctly 

 narrower than inferior angle. All bristles almost black; 

 ((cellars strong, divergent, longer than fronto-orbitals; 

 fronto-orbitals 2:2, the upper sujierior cons])icu()Usly 

 shorter than lower superior and yellowish white, in- 

 ferior ])airs more or less crossed and a little shorter 

 than lower superior; postverticals yellowish white, 

 parallel or slightly divergent, as long as upper superior 

 fronto-orbital; inner verticals strongest and longest of 

 all bristles of head, almost parallel, the outer pair 

 yellowish white and very slightly longer than jiost- 

 vertical; occipitals onh* one pair, the inner one yellowish 

 white, directed inward; bristles of occipital row yel- 

 lowish white, almost always four, intermixed with some 

 black fine setae; genal bristle yellowish white. Antennae 

 (pi. 25, fig. 5) inserted just below middle of eye, light 

 reddish yellow, moderately whitish tomentose, very 

 sliort; second segment whitish, nearly half as long as 

 following segment, without distinct median bristle; 

 third segment nearly half as wide as long, apex (piite 

 narrowed, dorsal margin concave, ventral nnirgin 

 strongly convex, marginal pubescence long; arista 

 black, with basal segments yellowish, microsco|)ically 

 pubescent. Palpi (pi. 25, fig. 6) comparatively large, 

 nearly one-third as wide as long, apex more or less 

 broadened and with some black bristles, ventral margin 

 with fine pubescence. 



Thorax a little longer tlian wide or high, ^[esonotum 

 (pi. 25, fig. 7) black, fully obscured by a yellowish-grey 

 tomentum and covered with a yellowish-white rather 

 stout but short depressed pubescence, but anterior 

 ])eri)endicular i)ortion quite bare: humeral calli more or 

 less yellowish, covered with a greyish tomentum and 

 furnished with erect yellowish-white setae; notopleural 

 calli comparatively large, swollen, yellowish, quite 



