I9I3-] ^^- Bezzi: Indian Trypaneids {Fruit-Flies). ' J43 



both sexes, showing in some varieties that of the Rioxa-typo.. But it seems that this is 

 not possible for the face does not retreat inferiorly, the antennae are longer, the arista 

 less pubescent and the thorax has pale yellow markings. 



46. Acidia rioxaeförmis, n. sp. d' ? . 

 (PI. ix, fig. 46). 



A yellow species with unspotted metanotum, black third antennal joint of male 

 and black wings withi hyaline indentations and spots. I^ength of the body 5| — 7 mm. , 

 of wing 6 — 7I mm. 



Head entirely yellow ; frons dark ferruginous, opaque, with strong white reflec- 

 tions ; face with whitish pollen ; cheeks also, a little broader than in the preceding, 

 with some short black bristles ; occiput a little swollen inf eriorly ; proboscis ferrugin- 

 ous, palpi dark yellow, with some bristly hairs ; antennae dark ferruginous, the third 

 joint i|- times as long as the second, very darkened or quite black in the male ; arista 

 black, shortly pubescent ; all the bristles black ; oc. rather long but weak ; occipital 

 row well-developed. 



Thorax as in the preceding but of paler colouring, and with the lateral pale stripe 

 not distinct ; scutellum of the same colour as the thorax ; metanotum unspotted ; 

 there is a very small black spot below the postalar calli, at the root of the wings, but 

 it is not easily seen more especially in some positions of the wings. Haltères yellow. 

 Abdomen entirely yellow as in the preceding ; male genitalia partly black ; ovipositor 

 shining black, not so short as in the preceding, as long as broad. I^egs entirely pale 

 yellow. 



Wings as in the preceding but distinctly narrower and longer ; the first vein longer , 

 reaching the small cross- vein, the stigma therefore a little longer than in the preceding ; 

 cross-veins more approximate, the distance being smaller than the length of the hind 

 cross- vein ; stigma entirely black. Costal cell hyaline, with blackened humeral cross- 

 vein and a brown spot in the middle ; the basal cells are filled with black, the anal 

 cell is hyaline with a black apex. Just after the stigma are two hyahne triangular 

 indentations, the first, which is the larger, passing forwards of the second vein, the 

 second, the smaller, not passing this vein. Hind margin with two ver}^ large hyaline 

 indentations ; one in the second posterior cell reaching the middle of the first posterior 

 cell ; the other smaller in the apex of the third posterior cell and of the discal cell, 

 ending on the fourth vein ; the hind cross-vein is therefore bordered with a narrow 

 black streak, dividing the two indentations. Third posterior and axillar cells entirely 

 hyaline ; base of the discal cell with a rounded hyaline indentation. There is a round 

 hyahne discal spot towards the apex of first basal cell, before the small cross- vein, 

 which sometimes is very small and indistinct. The black streak dividing the triangular 

 indentations of the fore border is sometimes incomplete, the two spots being fused into 

 a single spot, bearing an isolated black streak in the middle. 



Four cj and 2 ? f rom Simla, 7000 ft., 20-vii-ii, caught by Dr. Annandale in low- 

 growing herbage. 



