Memoirs of the Indian Musetim. 



[Vol. in, 



4 (7)- 



5 (6). 



6 (5). 



7 (4)- 



8 (3). 



9 (io). 



10 (9), 



13 (-^)- 



14 (13). 



Wings iu the middle with three round hyaline dots, disposed in a 

 triangle around the small crossvein. 



The three discal dots are rather large; abdomen with yellow spots vaga, Wied. 



The three discal dots very minute; abdomen without such spots mntyca, Walk. 



The discal dots wholly wanting . . . , . . vidua, n. sp. 



The intermediate bristles of the scutellum much weaker than 

 the others; slender species, with narrower wings and no costal 

 bristle ; legs slender and long ; thorax with blackish stripes on 

 the sides. 



The second costal hyaline indentation of the wings not united 

 with the second indentation of the hind margin ; abdomen with 

 black transverse bands .. .. .. .. diiiilopi, Wn\p 



The second indentation united with that of the hind margin to 

 form a complete hyaline cross-band in the middle of the wings ; 

 abdomen without transverse black bands . . . . soluia, n. sp- 



Stigma wholly black, the wings with a single indentation on the 

 fore border; arista with only a few minute hairs on the under 

 side ; two lower or. ; no costal bristle ; intermediate scutellar 

 bristle weak .. .. .. .. .. {musae, Vrogg.) 



Superior or., inner vt. and pvt. yellow; arista usually pectinate; 

 stigma black; no costal bristle; intermediate bristle of the 

 scutellum weak. 



First longitudinal vein ending in the middle between the auxi- 

 liary and the second vein ; wings without hyaline dots in the 

 middle; stigma wholly black .. .. .. quinqiiemacitlata, 



First vein very short; wings with many hyaline discal dots; 

 stigma with a hyaline dot . . . . . . . . stellata, Macq. 



19. Rioxa vaga, Wiedemann. 

 (PI. viii, fig. 22.) 

 Wiedemaiui, Auss. Zweifl., ii, 490, 21 \Trypeta] (1830). 



A yellow species of proportionally large size, with three large hyaline dots dis- 

 posed as a triangle in the middle of the wings. 



The single damaged specimen in the collection is without a head. All the bristles 

 black, the six scutellar of about equal size. Front femora with a row of 3 or ,\ 

 bristles beneath. First longitudinal vein elongated , but reaching the costa before the 

 middle between the auxiliary and the second vein. 



A male specimen from Tenasserim, Lower Burma {W . Doherty) -^ff-. Wiede- 

 mann records it from Bengal. 



20. Rioxa mutyca, Walker. 

 (PI. viii, fig. 23.) 

 Walker, L,ist Dipt. Brit. Mus., iv, 1036 [Trypeta, Euleia] (1849). 



Very like the preceding^ but distinguished by the pattern of the wings and 

 abdomen. 



Head wholly yellow; oc. very small, but distinct; only a pair of lower or.; 



