FRUIT FLIES OF THE liYUKYU ISLANDS 



93 



Wing (pi. 34, fig. 1) slightly longer than body, 

 nearly 2.8 times as long as wide, rather parallel-sided, 

 apex evenly rounded; costal vein rather strongly 

 curved apically, with two black costal spines, one of 

 wliich is very short; Ri moderately curved upward 

 so that tip of pterostigma is sharply pointed; Ra+s 

 nearh^ straight, quite divergent from straight R4+.5, 

 the latter almost parallel with m; r-ni and m-cu 

 straight, parallel and perpendicular, tlie former closer 

 to middle of IM2 than to its apex; pterostigma more 

 than two-thii'ds as long as second costal cell; anal 

 cell distinctly shorter than basal cell, apical margin 

 straiglit, inferior angle 90°. Wing blackisli brown, 

 anal lobe and large posterior portion of Cu grej'ish, 

 with many whitish and light brownisli spots as fol- 

 lows: in costal cell four ill-defined light brownisli 

 but large costal indentations, the basal very close 

 to apex of first cell, and the remaining in second cell; 

 in pterostigma one near apex somewhat rounded, 

 extreme base of cell sometimes hyaline; in Rj four 

 whitish indentations and about 10 light brownish 

 spots, the former not eciuidistant, distal three at about 

 middle and very close together, basal just beyond tip 

 of pterostigma, spots in one row along R.,^.3 from base 

 to behind ajjical two indentations; only one whitish 

 indentation hi R3 just beyond tip of R2+3, many 

 brownish spots in two u'regular rows; in 2M2 three 

 distinctly round whitish indentations, basal at inferior 

 corner and remaining two at about middle, four light 

 brownish spots in basal half; three large whitisli round 

 spots along apex of Cu, and another three round 

 whitish spots along anal vein, m addition about four 

 small whitish spots and two small light brownish ones 

 toward base; anal lobe with two rows of round whitish 

 spots, the anterior row consisting of five and posterior 

 row of four; many light brownish spots in UTegular 

 pattern in remaining portions. Halteres reddish 

 yellow, stalk light yellow, squamulae dark brown. 



Legs light yellow, brown pubescent. Foreleg (i)l. 34, 

 fig. 11) shortest; femur with brown bristly hairs in 

 two rows on dorsal surface, externoventral margin with 

 about four long brownish bristly hau-s; tibia slightly 

 shorter than fennn- or tarsus; first tarsal segment as 

 long as the four foUowmg segments together, slightly 

 longer than half the length of tibia, brushlike bristles 

 on internoventral surface yellowish white, bristles along 

 externoventral margin brownish and rather sjiarse. 

 Midleg (pi. 34, fig. 12) slightly longer than hindleg; 

 femur slightly shorter than tibia, without distinct 

 bristly hau-s; tibia as long as tarsus, with a single 

 conspicuously long and light yellowish apical spur; 

 first tarsal segment longer than half the length of tibia, 

 or the four following segments together, bristle rows 



on ventral surface as ui front tarsus. Hindleg (pi. 34, 

 fig. 13): femur shorter tlian tibia; tibia more or less 

 curved near base, nearly as long as tarsus, dorsal 

 surface with distinct brown setae in two rows; first 

 tarsal segment nearly half as long as tibia, slightly 

 shorter than the foiu- following segments togetlier, 

 bristled as m midtarsus. 



Length: Body 3.8-4 mm, wing 4-4.2 nun. 



Fem.\le. — Similar to male. Sixth abdominal tergum 

 (pi. 34, fig. 10) slightly shorter than fifth, posterior 

 margin black, one pair of large black median spots; 

 fifth tergum with two pairs of blackisli sjxits, the 

 very small to obsolete outer |)air placed extremely 

 laterad; fourth tergum with one [lair of blackish median 

 spots sometimes undeveloped. Basal segment of ovi- 

 positor as long as the four preceding ai)doniinal lerga 

 together, with distmct lateral margins, strongly shining 

 reddish yellow, rather fine iiubescent, with posterior 

 margin black, two small median black spots at base. 



Length: Body (without ovipositor) 3.2-3.5 mm, 

 wing 3.8-4.2 mm. 



Types.— Holotype, cf , USNM 69382, Okinawa Is., 

 Apr. 20; allotype, 9, Okinawa Is., Apr. 23 (USNM); 

 paratypes,: (BMH and NL\S) Okinawa Is., 5d', Mar. 

 27, Ai)r. 17, and 39, Mar. 27, Apr. 23; Amami-O.shima 

 Is., 2 6", May 1, 20, and 79, Apr. 29, 30, May 1-7. 



Subfamily Schistopterinae 



Genus Rhahdochaeta de Meijere 



Rhabdochncta de IMoijere, 1904, p. 109.— Shiraki, 19.3:3, p. 48:3. 



Rhahdochaeta asteria Hendel 



Plate 35 



Khabdochacta astcriu Hendol, 191.5, p. 462, pi. 9, fig. IS.— Shiraki, 

 1933, p. 4S6. 



A small lilackish species distinguished by two pairs 

 of scutellar bristles and by the upper inferior fron to- 

 orbital bristle which does not resemble the blade of a 

 sword. 



Male. — Head as wide as thorax, distinctly higher 

 than long, 1.5 times as wide as long. Frons (pi 35, 

 fig. 4) yellowish white, fronto-orbitals paler, nearly 

 2.6 times as wide as one eye, liartily narrowed forward, 

 lateral margins straight, flat; orbits well defined 

 throughout the entire length, more or less elevated; 

 \ertical calli long, extending to middle of frons; ocellar 

 triangle comparatively small, more or less blackish, an 

 ill-defined transverse carina present; lunule narrow, 

 slightly brownish. Face (pi. 35, fig. 3) greyish white, 

 with a pair of darker spots, comparatively small, 

 strongly narrowed at middle, allowing anterior angles 



