FRUIT FLIES OF THE RYUKYU ISLANDS 



41 



long as upper superior, the two upper pairs a little 

 longer than lowest superiors; inner verticals longest 

 and strongest, parallel; postverticals parallel, distinctly 

 shorter than ocellars that are nearly parallel and slender, 

 but longer than upper superior fron to-orbital, behind 

 each inner vertical one bristle (occipital) on level ol 

 postverticals; bristles of occii)ital row scattered; genal 

 bristles sometimes two. Antennae (pi. 15, fig. 9) light 

 yellow, distinctly shorter than face; second segment a 

 little shorter tlian one-half the third segment, with dis- 

 tinct median bristle; third segment nearly 1/2 as wide 

 as long, same width throughout with rounded apex, 

 the dorsal margin with a whitish minute jnibescence; 

 arista conspicuously longer than antenna, short 

 plumose. Palpi (pi. 15, fig. 10) whitish yellow, very 

 broad, wider than half tlie length, sparsely black 

 bristled. 



Thorax purplish black, nearly 4/5 as wide as long, a 

 little longer than high. Alesonotum (\A. 15, fig. 5) as long 

 as wide, quardate, obscured by a yellowish-grey tomen- 

 tum, covered with black niiiuite pubescense, sometimes 

 with a pair of inconspicuous very fine submedium 

 stripes on i)rozona; humeral calli comparatively small, 

 shining castaneous, lower half often yellowish with 

 erect blackish pubescence; notopleural calli more or 

 less shining, sometimes brownish black at: iiuier nuirgin; 

 scutellum distinctly pubescent, longer than one-fourth 

 mesonotum, nearly 1/2 as long as wide, the di.sk flat 

 with rather well-defined jiale lateral carinae, lateral 

 borders nearly perpendicular. Pleura (pi. 15, fig. 6) 

 shining, almost entu'ely l)are but with very sjiarse 

 black erect pubescence, prothorax castaneous, wing- 

 base brownish black, sternopleuron with blackish 

 sparse bristly hau's along ventral margin. All bristles 

 Ijlack: inner scapulars a little shorter than outers, 

 parallel; humerals about at middle of callus, slightly 

 longer than presuturals, or as long as anterior noto- 

 pleurals; posterior notopleurals distuictly shorter than 

 anterior; dorsocentrals disti:ictly posterior to level of 

 anterior supra-alars, nearly as long as latter; prescu- 

 tellars very sliglitly before a line connecting inner pos- 

 terior supra-alars, as long as dorsocentrals; apical 

 scutellars conspicouously shorter than basal, often 

 crossing; mesopleurals two, pteropleural bristle directed 

 posterodorsally, sternopleurals dii'ected dorsally, all 

 nearly the same length. 



Abdomen (pi. 15, fig. 8) nearly as long as thorax, 

 slightly broader, sinning, yellowish grey dusted excej)t 

 the fifth tergum, blackish pubescent; the second tergum 

 with blackish erect long pubescence on lateral portions, 

 mai-ginal bristh' hairs of terga comparatively long, 

 especially on last two terga, apical margin of the fifth 



tergum with two or three j)airs of very long bristles; 

 genitalia comparatively large, castaneous, basal seg- 

 ment with bhi(;kish long haii's, dorsal a])pendages 

 conspicuously larger than the ventral, which are slender 

 and spinelike; venter uniformly black and shinmg. 



Wings (pi. 15, fig. 1) a little shorter than body, 

 twice as long as wide; costal vein attaining end of m, 

 costal spine distinctly shorter than basal bristle; Ri 

 strongly bent anteriorly at apex; R2+3 and R4+.5 more 

 or less undulate, the latter bristled from base to beyond 

 r-m, which is perpendicular beyond nuddle of IM2; 

 m very slightly divergent from R4+S; m-cu straight, 

 almost perpendicular; pterostigma very short, nearly 

 lialf as long as second costal cell; anal cell conspicu- 

 ously shorter than basal cell, with short inferior pro- 

 longation. Brownish black, with the alulae and anal 

 lobe hyaUne and with sLx hyaline markings as follows: 

 a very small spot at base of Ri, which hardly connects 

 with basal oblique band in Cu; a single triangular 

 indentation at costal border, just beyond pterostigma, 

 attaining R4+5; a straight median cross band from 

 costa to posterior margin of IAI2, which is slightly 

 narrowed posteriorly; a straight apical band from above 

 R4+5 to tip of m, gradually broadened posteriorly; a 

 very large subapical triangular spot just below middle 

 of apical section of R4+5 to apical margin of 2M2, 

 almost filling 2M2; a straight, oblique basal band from 

 apico-inferior margin of M to end of anal vein, a little 

 broadened apically. Haltere blackish brown, the stalk 

 light yellowish brown. 



Legs ocliraceous, blackish pubescent, the femora of 

 two posterior pairs blackish brown, moderate in length. 

 Foreleg (pi. 15, fig. 11) conspicuously shorter than 

 others; femur more or less darkened on the external 

 surface, conspicuously longer than tibia, externodorsal 

 surface with two rows of black bristly hairs, externo- 

 ventral margin with one row of approximately six 

 black long bristly hairs; tibia nearly 4/5 as long as 

 femur, longer than tarsus; first tarsal segment as long 

 as the four following segments together, longer than 

 half the tibia, brushlike bristles on internoventral 

 surface somewhat yellowish and long. Midleg (pi. 15, 

 fig. 12) very slightly longer than hindleg; femora 

 nearly as long as tibia, with two rows of black bristly 

 hairs on ventral and external surfaces; tibiae with two 

 distinct apical spurs, of which one at ventral apex is 

 conspicuously long, the other on external apex nearly 

 1/2 as long as former, in addition one or two very 

 short bristles on external apex; tarsi nearly as long as 

 the tibia, the first segment distinctly longer than the 

 four following segments together, the brushlike bristles 

 on interno\'entral surface j-ellowLsh brown and some- 



