DIPTERA FROM NEPAL 57 



Ac-index about 38. Ci-bristle one, short ; C3-fringe on basal half. Halteres white. Abdominal 

 tergites mainly black ; 2-5T each with a pair of white spots on anterior margin ; 6T white. 

 Periphallic organs pale yellow. Genital arch not narrowing above, pubescent and rather 

 weakly setigerous, subapically dilated ; heel high. Clasper proximally narrowing, with about 

 seven large black teeth in a weakly concave row on entire distal margin and two large subapical 

 black teeth. Anal plate separated from genital arch, oblong, large, setigerous and pubescent. 

 Phallic organs pale yellow. Aedeagus elliptical in ventral aspect ; basal apodeme rod-shaped, 

 as long as aedeagus. PI = 1 o. Anterior paramere fused to oval hypandrial plate, apically 

 with about two sensilla ; hypandrial plate with a long submedian hair inserted outside sensilla. 

 Posterior parameres fused to become a fan-shaped oval flap, lateral margin serrated. Ventral 

 fragma large, oval. p.f. = abCdEfgHIKlm'N. Ejaculatory apodeme pale yellow with 

 narrow plate and distally broadened stalk, which is slightly longer than the plate. 



Arun Valley, above River Sabhaya, east shore, swept from dwarf bamboos in deep 

 ravine, c. 2,000', 12.xii.1961, 1 £ (R.L.C.). 



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



CHAETODROSOPHILELLA Duda 



Chaetodrosophilella Duda, 1923 : 40. 

 Chaetodrosophila Duda, 1924a : 180. 



Type-species : Drosophila quadrilineata de Meijere, 19 11 : 396 (Java). 



Chaetodrosophilella coei sp. n. 



(Text-figs. 158-163) 



o\ $. Body about i-6 mm., slender. Head somewhat broader than thorax. Eyes oval, 

 dark red, relatively small, finely pilose. Antennae with second segment greyish brown ; third 

 oval, grey, pubescent, broader than second joint. Arista with about four dorsal and two ventral 

 branches and a moderate terminal fork. Palpus yellowish grey, slender, curved upward, with a 

 long subapical and a few shorter ventral setae. Ocellar triangle black. Periorbit grey, large, 

 anteriorly rounded, medially narrowing, three-fourths as long as front. Front yellowish grey, 

 convex, anteriorly paler, depressed along margin of frontal triangle, anteriorly one and a half 

 times as broad as length down middle ; posteriorly two-thirds as broad as head width. Clypeus 

 yellowish grey. Cheeks yellowish grey, broad, nearly half as broad as the greatest diameter of 

 eye. Occiput yellowish grey. Postverticals long. Anterior reclinate orbital minute, just 

 outside proclinate, which is slightly shorter than posterior reclinate. Mouth-parts slender. 

 Only one long oral. Face broad, yellowish grey, anteriorly rounded, flat, parallel-sided. Carina 

 low, short, pale, half as long as front. 



Mesonotum greyish brown, somewhat pollinose, caudolateral side fuscous. Scutellum 

 greyish brown. Thoracic pleura pale, darker above ; humeral callus dark. Thorax rather 

 elongate. Two long numerals. Acrostichal hairs in six rows. Three pairs of dorsocentrals ; 

 presutural pair slightly outside others ; distance between two posterior pairs four-fifths distance 

 between individuals of each pair. Sterno-index about 06. Legs yellowish grey, tarsi slightly 

 darker ; fore femur with a row of a few long black setae below, without a row of ventral spinules. 

 All metatarsi as long as next three segments together. Preapicals on all legs ; apicals on fore 

 and mid legs. Wings slightly fuscous, relatively narrow, weakly pointed at tip. i? 4 + s and M 

 distally somewhat divergent, medially narrowing. Crossveins clear. C-index about 25 ; 

 4V-index about 27 ; 4C-index about 14 ; 5x-index abont 2-6 ; Ac-index about 2-5. Ci- 

 bristles two, subequal ; C3-fringe on basal half. Halteres greyish brown, knob pale. Abdominal 

 tergites yellowish grey, each with a broad black medially contiguous caudal transverse band. 

 Female cercus yellow, longer than broad. 



