1913-] J^- Bezzi : Indian Trypaneids {Fruit-Flies). 113 



bristles of the occipital row rather long ; after the genal bristle are some other black 

 smaller bristles. Thoracic and scutellar bristles black; pleura with dark and long 

 pubescence. Abdomen shining, the pattern as described by Walker, the last seg- 

 ment of the male wholly black, with a small central yellow dot, and with long bristles 

 on the sides and hind margin. I^egs as in the preceding, wholly yellow. Wings with 

 the same pattern, the three discal dots in the same position but much smaller; there 

 are also two hyaline streaks at the tips of the submarginal and of the first posterior 

 cell, which are wholly wanting in the preceding. The first vein has the same length, 

 ending after the small cross -vein. 



A single male from Sadiya, Assam (^-s--) determined by Bigot as Trypeta mutyca, 

 Walker. Walker records the species from East India. 



21. Rioxa vidua,, n. sp. 2 . 



(PI. viii, fig. 24.) 



Very like the two preceding species, but without the discal hyaline dots. Length 

 8^ mm. 



Head wholly yellow, opaque, a little shining about the vertex ; antennae dark 

 yellow; arista deeply plumose; proboscis and palpi yellow, pale-haired, the last with 

 some black bristle-like hairs; oc. very small; or. stout, 2. i. ; vt. 2, the inner very 

 long; pvt. parallel, strong; all the bristles black, those of the occipital row rather 

 long ; after the genal bristle some smaller black bristles. 



Thorax wholly yellow, shining, with short yellow pubescence on the dorsum, and 

 longer and darker pubescence on the pleura; all the bristles black. Scutellum like 

 the thorax, its six bristles of equal size; metanotum blackish. Haltères yeUow, 

 squamulae pale-haired. 



Abdomen damaged ; it seems to be black, with the two basal segments yellow ; 

 venter yellow ; black bristles on the sides. Legs wholly yellow ; coxae with some 

 black bristles ; front femora with a row of 5-6 bristles beneath and some black hairs 

 on the outside ; hairs of the row on the hind tibiae dark yellow. Wings as in vaga, 

 but the discal dots wanting, or only the outer a little distinct ; the anal cell is pro- 

 longed into a point longer and smaller than that of the two preceding species. 



A single female from Sikhim {de Niceville) --fl-. 



22. Rioxa dunlopi, Wulp. 



(PI. ix, fig. 25.) 

 Wulp, Tijdschr. v. entom., xxiii, 186, 45, pi. 11, f. 8 and 9 [Ptilona] (1880); Meijere, Bijdr. tot de 



Dierk. , xvii, no [Rioxa] (1904) ; Enderlein, Zoolog. Jahrbuch., xxxi, 448 (19T1). 

 A yellow middle-sized species with only two hyaline discal spots and very hairy 

 front legs in the male. 



Head broader than in the preceding ; the inferior orbits with an argenteous 

 stripe which is wanting in the three preceding species ; or. 2. i ; all the bristles 

 black ; arista a little more shortly plumose. Thoracic and scutellar bristles black ; 

 the intermediate scutellar bristle much weaker than the others. Abdomen shining. 



