34 T. OKADA 



Holotype <£. East Nepal : Arun Valley, east shore of River Arun, below 

 Tumlingtar, evergreen shrubs bordering dry stream-beds, c. 1,800', 14-23. xii.1961 

 (R.L.C.), BMNH. 



Allotype 9- Taplejung District, between Sangu and Tamrang, dense vegetation 

 in tree shade by hill stream, c. 5,500', 23.x. 1961 (R.L.C.), BMNH. 



Paratypes : 1 (J, same data as holotype ; 1 <$, below Sangu, mixed vegetation on 

 sheltered slopes above river, c. 4,000', 3.1.1962 ; 1 $, below Sangu, edge of small 

 mixed wood, c. 6,000', 4.xi.i96i ; 1 <j>, between Sangu and Tamrang, mixed shrubs 

 in deep gorge, c. 5,200', x-xi.1961 ; 1 $, old mixed forest above Sangu, c. 6,200', 

 25-28. x.1961 (R.L.C.), BMNH ; 1 <$, below Sangu, deposited at the Tokyo Metro- 

 politan University. 



Resembles L. flavipalpis Duda, 1939, (Uganda, Africa) in having pale palpus, 

 clear wings, pale halteres, spotted abdominal tergites, and silvery pollinose mesono- 

 tum, but differs from it in having nearly straight R 2+3 (hence the specific name) and 

 larger C-index (2-5 in flavipalpis) . 



Leucophenga nigroscutellata Duda 

 (Text-figs. 74, 86-90) 

 Leucophenga nigroscutellata Duda, 1924a : 186 ; 1924b : 237 (Formosa). 



cJ, $. Body about 3 mm. Head slightly broader than thorax. Eyes reddish brown, bare. 

 Antennae with second segment orange-yellow ; third greyish brown, oblong. Arista with about 

 five dorsal and one ventral sparsely arranged branches and a large terminal fork. Palpus 

 yellowish brown, oblong, with an apical and a few ventral setae. Ocellar triangle black, grey 

 pollinose. Periorbit pale greyish brown, somewhat glossy, short, half as long as front, not 

 constricted medially. Front yellowish white, parallel-sided, anteriorly paler and two-thirds as 

 broad as length down middle ; posteriorly about one-third as broad as head width. Face 

 whitish grey, somewhat concave. Clypeus brown. Cheeks yellowish white, narrow, about one- 

 twentieth as broad as the greatest diameter of eye. Occiput dark brownish black. Anterior 

 reclinate orbital four times as distant from posterior reclinate as from proclinate. Postverticals 

 short. One prominent oral, others fine. 



Mesonotum dark brown, slightly glossy, not distinctly pollinose ; humeral callus pale. 

 Scutellum brownish black, matt, apically pale. Thoracic pleura mostly dark brown. Three 

 long humerals, median one longest, ventral one shortest. Acrostichal hairs in about eight 

 irregular rows. Anterior dorsocentrals one-third as long as posteriors ; distance between 

 anterior and posterior dorsocentrals about one-third distance between anterior pair. Anterior 

 scutellars divergent ; posterior scutellars about two-fifths as long as anteriors, nearer to each 

 other than to anteriors. Sterno-index about o-6. Legs yellowish white ; mid and hind knees 

 brown ; front metatarsi as long as next three segments together, mid metatarsi subequal to the 

 succeeding segments, hind metatarsi longer than the succeeding segments. Preapicals on mid 

 and hind legs ; apicals on mid leg. Wing hyaline, veins pale, -ff 2+3 nearly straight, not curved 

 to costa at tip ; i? 4 + 5 and M nearly parallel. C-index about 2-6 ; 4V-index about i-8 ; 4C- 

 index about 11 ; 5x-index about 1-9 ; Ac-index about 2-3. Ci-bristles two ; C3-fringe on 

 basal about two-thirds. Halteres yellowish white. Abdominal tergites mostly black, somewhat 

 glossy ; iT yellow, often laterally fuscous ; 2T medially with a yellow caudally narrowing patch ; 

 ultimate T white. 



