22 DETERMINATION OF SPECIES. 



2. Longest hairs in fringe on front margin of 



third joint of antennae, in length equal 

 to from one-fourth to one-third (not 

 exceeding one-third) of width of third 



joint ; palpi of moderate length tabaniformis, Westw. 



Longest hairs in fringe on front margin of 

 third joint of antennae in length equal 

 to from one-half to three-fourths of width 

 of third joint ; palpi noticeably long and 

 slender nigrofusca, Newst. 



3. Pleurae drab-grey or isabella-coloured, hind 



coxae buff or greyish-bufi fusca, Walk. 



Pleurae dark grey, hind coxae mouse-grey . fnscipleuris, sp. nov. 



IV. 



Glossixa brevipalpis Group. 



1. Dorsum of thorax with four sharply defined, 



dark brown, more or less oval or elongate 

 spots, arranged in a parallelogram, two in 

 front of and two behind the transverse 

 suture ; proboscis bulb with a sharply 



defined brown or dark brown tip longipennls, Corti. 



Dorsum of thorax without such spots ; pro- 

 boscis bulb not brown or dark brown at 

 the tip 2 



2. Wings with upper, thickened portion of 



anterior transverse vein much darker in 

 colour than adjacent veins, and thus stand- 

 ing out conspicuously against the rest of 



the wing brevipalpis, Newst. 



Wings with upper, thickened portion of 

 anterior transverse vein not much darker 

 in colour than adjacent veins, and thus 

 not standing out conspicuously against 

 the rest of the wings (wings practically 

 unicolorous) mcdicorum, sp. nov. 



