ioo T. OK AD A 



marginally grey pollinose. Periorbit greyish brown, somewhat glossy, anteriorly blunt and not 

 reaching anterior margin of front. Front matt orange-grey, anteriorly orange, and one and one- 

 third times as broad as long, posteriorly half as broad as head width. Clypeus brown. Face 

 greyish yellow, laterally concave. Carina high, long, laterally fuscous. Cheeks greyish yellow, 

 about one-eighth as broad as the greatest diameter of eye. Occiput yellowish brown. Anterior 

 reclinate orbital outside other orbitals, about one-third as long as posterior reclinate, half as long 

 as proclinate, twice as distant from posterior reclinate as from proclinate. Postverticals 

 moderate in size. Second oral nearly as long as vibrissa, succeeding orals short. 



Mesonotum and scutellum matt yellowish brown, somewhat pollinose ; humeral callus paler. 

 Thoracic pleura greyish brown, sometimes with two broad obscurely demarcated dark brown 

 longitudinal patches. Two humerals, lower longer. Acrostichal hairs in six rows. Anterior 

 dorsocentrals less than half as long as posteriors ; distance between anterior and posterior 

 dorsocentrals half distance between anterior pair. Anterior scutellars parallel, longer than 

 posteriors, which are slightly nearer to each other than to anteriors. Sterno-index about 0-5. 

 Median sternopleural strong, longer than anteriors, but shorter than posteriors. Legs fuscous 

 yellow. Front metatarsi as long as next three segments together, mid and hind metatarsi as 

 long as the other segments together. Preapicals on all legs ; apicals on mid leg. Wings 

 hyaline, crossveins clouded. Costa reaching M. i? 2 +3 gently convex at middle, apically nearly 

 straight. i? 4 + 5 and M parallel. C-index about 3 -3 ; 4.V-index about 1 -8 ; 4C-index about 

 o-8 ; 5x-index about i-6 ; Ac-index about 17. Ci-bristles two, subequal ; C3-fringe on basal 

 two-thirds. Halteres yellow. Abdominal tergites matt yellowish grey, each with a medially 

 interrupted clearly indicated straight black caudal band ; caudal tergites mostly black. 



Periphallic organs : Genital arch brownish black, caudal margin medially protruded tri- 

 angularly and with a few long hairs, deeply and broadly concave at the base of clasper, narrow- 

 ing below. Clasper brownish black, quadrate, large, with a slightly concave row of about eight 

 black teeth on nearly entire length of distal margin. Anal plate oval, setigerous and pubescent, 

 ventrally somewhat pointed and with a tuft of short hairs. Phallic organs : Aedeagus robust, 

 yellowish orange, rod-like, apicodorsally with a short acute projection, which is directed caudally, 

 apically somewhat dilated, basally with a large vertical rod. Apodeme of aedeagus thick, short, 

 about one-third as long as aedeagus. PI = 3-0. Anterior paramere pale, narrow, apically 

 with a long sensilla. Ventral fragma long, narrow, triangular. Hypandrial plate slender, 

 laterally serrated, apically curved, basally attached on lateral arm of ventral fragma. A stout 

 long submedian spine inserted below hypandrial plate. Median notch of ventral fragma very 

 deep and wide. p.f. = ab'Cdefg HIklmn. Egg-guide lobe yellowish brown, apically narrowing, 

 with about sixteen marginal yellow teeth and three slender dorsal and discal setae. 



Holotype $. East Nepal : Aran Valley, east shore of River Arun below Tum- 

 lingtar, evergreen shrubs bordering dry stream-beds, c. i,8oo', 14-23. xii.1961 

 {R.L.C.), BMNH. 



Allotype $. Same data as holotype (R.L.C.), BMNH. 



Paratypes : 33 $, 20 $, same data as holotype ; 1 g, river banks below Tamrang 

 Bridge, c. 5,500', x-xi.1961 ; 1 $, between Sangu and Tamrang, mixed shrubs in 

 deep gorge, c. 5,200', x-xi.1961 ; 1 $, Arun Valley, above River Sabhaya, east shore, 

 swept from dwarf bamboos in deep ravine, c. 2,000', 12. xii.1961 ; 2 <J, 6 $, below 

 Tumlingtar, River Sabhaya, west shore, evergreen shrubs on sandy shore, c. 1,800', 

 9-17. xii.1961 ; 4 (J, 4 $, ibid., west shore, fermented millet seeds on shore, c. 1,800', 

 24. xii.1961 ; 2 $, Dobhan, east bank of River Tamur, mixed vegetation by stream 

 in deep gully, c. 3,500', i-ii.1962 (R.L.C.), BMNH, and 1 $, 1 $ at the Tokyo Metro- 

 politan University. 



Closely allied to D. (D.) sternopleuralis Okada and Kurokawa, 1957 (Japan and 



