DIPTERA FROM NEPAL 37 



Taplejung District, Sangu, mixed vegetation by stream in gully, c. 6,200', 

 ix-x.i96i, 1 $ ; old mixed forest above Sangu, c. 6,200', 25-28. x.1961, 3 $ ; below 

 Sangu, edge of small mixed wood, c. 6,000', 4.xi.i96i, 1 $ ; below Sangu, mixed 

 vegetation on sheltered slopes above river, c. 4,000', 2. i. 1962, 1 $ (R.L.C.). 



Distribution : Nepal (new locality), Java, Formosa. 



Differs slightly from the original form in having less distinct dark band on the 

 thoracic pleura and lower 4V-index. 



Subfamily DROSOPHILINAE 

 MICRODROSOPHILA Malloch 

 Microdrosophila Malloch, 192 1 : 312. 



Type-species : Drosophila quadrata Sturtevant, 19 16 : 341 (N. America). 



Key to Species 



1 Third costal section with strong bristles on almost entire length. Second costal break 



deep, more than one-fourth as deep as the length of first costal section between two 

 breaks. Wing somewhat pointed at tip ..... pectitiata (p. 37) 



- Third costal section with strong bristles ending well before the apex ... 2 



2 Second costal break more than one-fourth as deep as the length of first costal section 



between two breaks. First costal section apically much swollen and black . sp. (p. 39) 



- Second costal break less than one-fifth as deep as the length of first costal section 



between two breaks. First costal section apically not much swollen and not black . 3 



3 Third costal section with strong bristles on its basal two-thirds. Arista with only three 



dorsal and two ventral branches beside terminal fork. Thoracic pleura dark only on 

 humeral callus ......... pauciramosa (p. 40) 



- Third costal section with strong bristles on its basal five-sixths or more. Arista with 



about six dorsal and three ventral branches beside fork. Thoracic pleura with 

 more or less distinct black longitudinal stripe ...... 4 



4 Palpus orange-yellow. Thoracic pleura with diffuse dark brown longitudinal stripe. 



Halteres yellow ......... marginata (p. 42) 



- Palpus black. Thoracic pleura with a well demarcated black longitudinal stripe. 



Halteres black or brownish black ......... 5 



5 Mesonotum with three distinct black longitudinal stripes. Ocellar triangle black 



nigripalpis (p. 41) 



- Mesonotum with three diffuse black stripes or uniformly dark brown. Ocellar 



triangle yellow ........ nigrohalterata (p. 41) 



Microdrosophila pectitiata sp. n. 



(Text-figs. 97-100) 



o. Body about 15 mm. Head slightly broader than thorax. Eyes dark red, pilose. 

 Antennae with second segment dark yellowish brown, large, conical ; third narrower, yellowish 

 brown, with long pubescence. Arista with about five dorsal and one ventral branches and a 

 moderate terminal fork. Palpus pale yellowish brown, with a few stout black apical setae. 

 Ocellar triangle pale yellowish grey, black within ocelli. Periorbit rather narrow, somewhat 

 convex, anteriorly broadened, extending near anterior margin of front. Front pale yellowish 

 grey, slightly glossy, mediolaterally fuscous, anteriorly two and a half times as broad as length 

 down middle, posteriorly about three-fifths as broad as head width. Clypeus yellowish white. 



