DIPTERA FROM NEPAL 119 



Below Tamrang Bridge. 



River banks, c. 5,500'. Leucophenga (10), Liodrosophila (34), Scaptomyza (39), 

 Diathoneura (42), Drosophila (48, 52, 53, 54, 67). 



Dobhan, c. 3,500'. 



East bank of River Tamur, mixed vegetation by stream in deep gully. Micro- 

 drosophila (24), Liodrosophila (35), Scaptomyza (39), Drosophila (57, 67). 



Evergreen trees overhanging stream in deep gully. Leucophenga (15, 20), Droso- 

 phila (57, 58). 



Shady places on shrubby slope above River Tamur. Leucophenga (10), Scaptomyza 

 (38), Drosophila (63). 



Small pockets of plants on arid slopes above River Maewa. Leucophenga (10), 

 Microdrosophila (29). 



Spray-splashed rocks in River Maewa. Drosophila (65). 



Mixed vegetation in dry gully on wooded slope. Leucophenga (19). 



Arun Valley 

 Below Tumlingtar. 



East shore of River Arun, evergreen shrubs bordering dry stream-beds, c. 1,800'. 

 Apsinota (6), Leucophenga (8, 9, 10, 11, 13, 15, 16, 18, 19, 21,22), Microdrosophila (28). 

 Liodrosophila (33, 34, 35), Scaptomyza (38), Drosophila (45, 48, 62, 67, 69, 76). 



East shore of River Arun, swept from Ricinus communis L, c. 1,800'. Scaptomyza 

 (38). 



West shore of River Arun, evergreen shrubs bordering dry stream-beds, c. 1,800'. 

 Leucophenga (14). 



River Sabhaya, west shore, fermented millet seeds on shore, c. 1,800'. Liodroso- 

 phila (33, 35), Drosophila (59, 62, 67, 76). 



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

 (5), Leucophenga (17), Liodrosophila (33), Drosophila (76). 



River Sabhaya, west shore, from rotten bananas in traps, c. 1,800'. Drosophila 

 (76, 77)- 



Tumlingtar 



Bare rocky slopes above River Sabhaya, west bank, c. 1,900'. Apsinota (5). 



Above River Sabhaya. 



East shore, swept from dwarf bamboos in deep ravine, c. 2,000'. Leucophenga 

 (12, 15), Liodrosophila (33, 35), Diathoneura (36), Drosophila (67). 



NOTES ON SOME SPECIAL DIAGNOSTIC CHARACTERS 

 A. ARCHESTINIC CHARACTERS 



Stenzel (1963) proposed the terms " archestinic " and " archekastic " for the 

 diagnostic generic characters which occur in some and all of the member taxa, 

 respectively. The idea " archestinic " can be ascribed to the polythetic principle 



