54 T. OKADA 



Liodrosophila nitida Duda 

 (Text-figs. 146-151) 



Liodrosphila nitida Duda, 1922 : 157 (Annam, Formosa) ; Duda, 1924b : 241 (Formosa). 

 Liodrosophila nitida var. marginifrons Duda, 1926 : 53 (Sumatra). 



6*. $• Body about 1 -6 mm. Head as broad as thorax. Eyes reddish brown, bare, oval in 

 lateral aspect. Antennae with second segment large, rounded ; third black, basally brown, 

 apically swollen and rounded, one and a half times as long as broad. Arista with about five 

 dorsal and two ventral long branches and a large terminal fork. Palpus black, with a long 

 apical and a few shorter ventral setae. Ocellar triangle black, glossy. Periorbit glossy chestnut- 

 black, anteriorly narrowing, four-fifths as long as front. Front glossy blue-black, anterior one- 

 fourth orange-brown ; posteriorly broadened and about two-thirds as broad as head width ; 

 anteriorly broader than length down middle. Cheeks dark brown, pale along eye margin, about 

 one-fourth as broad as the greatest diameter of eye, narrow below. Occiput black. Anterior 

 reclinate orbital minute, twice as distant from posterior reclinate as from proclinate, outside 

 latter. Posterior reclinate stout, one and a half times as long as proclinate. Second oral 

 slightly shorter than vibrissa, which is relatively weak. 



Mesonotum glossy bluish black, strongly convex, without punctures nor pubescence. Scutel- 

 lum short, velvety black, apically with grey pubescence. Thoracic pleura glossy black, some- 

 what bluish. Two subequal humerals. Acrostichal hairs in six rows. Anterior scutellars 

 divergent, two-thirds as long as posteriors, which are nearer to anteriors than to each other. 

 Distance between anterior and posterior dorsocentrals two-thirds distance between anterior 

 pair; anterior dorsocentrals three-fourths as long as posteriors. Sterno-index about 09. Legs 

 yellowish brown ; femora black, glossy, apically paler. Mid metatarsi as long as the other 

 segments together, fore and hind metatarsi subequal to next three segments together. Pre- 

 apicals prominent on fore and mid legs ; apicals on mid leg. Wings hyaline, veins brown, 

 crossveins clear. Costa reaching M, weak beyond i? 4 + 5 ; -#2+3 curved to costa at tip ; i? 4 + 5 and M 

 slightly convergent at tip. C-index about 1-2 ; 4"V-index about i-8 ; 4C-index about 17 ; 

 5x-index about 1 -3 ; Ac-index about 4-0. Ci-bristle one, short ; C3-fringe on basal two-thirds. 

 Halteres black, stalk yellow, knob large and triangular. Abdominal tergites glossy black, 

 somewhat shining blue. Abdominal sternites small, quadrate, surrounded by pale membrane. 



Periphallic organs brownish black. Genital arch dorsally abruptly narrowed, ventrally 

 slightly broadened and truncate below, apicoventrally black, projected caudally. Clasper oval, 

 with a strongly convex row of about thirteen large black teeth, occupying entire outer margin, 

 subapically with a large black spine on inferior surface. Anal plate elliptical, large, setigerous, 

 ventrocaudal end with a tuft of short hairs. Phallic organs dark brown. Aedeagus elliptical 

 in ventral aspect, medially pale ; basal apodeme slightly shorter than aedeagus, slender, straight, 

 PI = i-6. Anterior paramere small, elongate, subapically with a few sensilla. Hypandrial 

 plate large, crescentic, apico-inferiorly with numerous minute tubercles. Ventral fragma 

 quadrate, lateral arm pointed, p.f. = aBCdEFgHIklm'N. Egg-guide lobe brown, basally 

 darker, fusiform, with both ends pointed, with about thirteen marginal and four long discal dark 

 brown teeth, ultimate marginal tooth largest. Basal isthmus brown, straight, one-fifth as 

 long as lobe. 



Taplejung District, old mixed forest above Sangu, c. 6,200', ix-x.1961, 1 $ ; 

 Sangu, mixed vegetation by stream in gully, c. 6,200', ix-x.1961, 1 $ ; below Sangu, 

 edge of small mixed wood, c. 6,ooo', 4.xi.io,6i, 1 <$ ; below Sangu, by stream in shady 

 ravine, c. 6,000', 30.x. 1961, 1 $ ; Dobhan, east bank of River Tamur, mixed vegeta- 

 tion by stream in deep gully, c. 3,500', i-ii.1962, 4 <$, 1 $. Arun Valley, above 

 River Sabhaya, east shore, swept from dwarf bamboos in deep ravine, c. 2,000', 

 12.xii.1961, 14 (J, 15 $ ; below Tumlingtar, River Sabhaya, west shore, fermented 



