388 Mr. R. E. Turner on 



Gymnoscelus ruyidorsalis, sp. n. 



5. Nigra; antennis 32-articulatis, articulis 11-14 albidis ; palpis 

 pedibusque ferrugineis ; femoribua posticis supra, tibiisque 

 posticis apice nigro-suff usis ; tarsis posticis articulis duobus 

 basalibus albidis ; alis hyalinis, iridescentibus, venis nigris. 



Long. 8 nam. ; terebrte long. 5 mm. 



? . Face rugulose with a few strong longitudinal striae ; 

 mandibles stout, bidentate at the apex, the inner tooth the 

 longest; cheeks a little longer than the scape, strongly 

 punctured. Third and fourth joints of the antennae sub- 

 equal. Front concave in the middle and smooth, the 

 concave area reaching to the anterior ocellus and bounded 

 laterally by carinae, a low longitudinal carina between the 

 antennae ; between the concave area and the eyes the front 

 is finely rugulose. Vertex smooth and shining, head slightly 

 narrowed behind the eyes, posterior ocelli half as far again 

 from the eyes as from each other, nearer to the hind margin 

 of the head than to the eyes. Lateral lobes of the meso- 

 notum and the median lobe in front finely and closely 

 punctured, from before the middle to the hind margin 

 extends a broad and very coarsely reticulated area ; notauli 

 developed in front, but disappeaiing in the reticulated 

 space. Pleurae more or less coarsely reticulate. Basal 

 half of the scutellum occupied by a deep depression, in 

 which are several longitudinal carinae, the apical half 

 punctured. Median segment coarsely reticulate, with two 

 longitudinal carinae which do not reach the base, but are 

 joined by a curved carina near the base. Abdomen sessile, 

 first tergite nearly as long as the rest of the abdomen, nearly 

 twice as long as its apical breadth, coarsely rugose-reticulate, 

 the median area divided from the lateral areas by a well- 

 marked carina on each side; the remaining tergites broader 

 than long, smooth and shining. Hind coxae and femora 

 rather sparsely punctured, the femora without a spine. 

 Second abscissa of the radius a little longer than the first, 

 second cubital cell more than twice as long on the cubitus 

 as on the radius ; nervulus postfurcal. Anal cell of fore 

 wing with two transverse nervures, the second indistinct and 

 obsolescent. 



Hab. Chapa, Tonkin; June 4, 1916. 



In the condition of the second transverse nervure of the 

 anal cell this forms a link between typical Gymnoscelus and 

 Cameron's genus Edyia, which I think must sink as a 

 synonym. 



