LIST OF DIPTERA. 859 



of the scutcheon armed with black spines : abdomen obconical, fer- 

 ruginous, hardly broader and not longer than the chest ; hind bor- 

 der of third segment armed with black spines; a narrow black band 

 on the hind border of each segment ; a broad black stripe along the 

 back, which is not furrowed ; tip truncated, not notched ; each seg- 

 ment adorned with two round bright green spots on the back, and 

 with a triangular spot of the same colour on each side ; last seg- 

 ment mostly green : legs black, clothed with black hairs and bris- 

 tles ; shanks dark ferruginous : wings colourless ; a blackish brown 

 spot near the base, which is slightly tawny ; wing-ribs and veins 

 dark ferruginous; veins black towards the tips; tip cross-vein form- 

 ing an obtuse angle with the fourth longitudinal vein, very slightly 

 curved inward along some part of its course, straight from thence 

 till near the tip, where it is inclined outward ; lower cross-vein with 

 two very slight curves, the lower inward, the upper outward and 

 somewhat irregular ; scales pale yellow, with brown borders. 

 Length of the body 6 lines ; of the wings 12 lines. 

 a. New Holland. Presented by the Haslar Hospital. 



Dexia Onoba, n. s., mas. Cyaneo-viridis albo mirans, capite nigro, 

 thorace ceneo subvittato, laterihus sculello abdominisque basi 

 ferrugineo purpureoque ornatis, abdominis villa nigra, antennis 

 palpisque nigris, pedibus ferrugineis, tarsis nigris, alis subcine- 

 reis. 



Body clothed with black hairs and bristles : head black, 

 adorned with a white covering and with a dark brown stripe, which 

 widens from the eyelets to the feelers, clothed beneath with yellow 

 hairs ; epistoma dark tawny, very prominent ; sides of the face 

 fringed with bristles along half the length : eyes dark red ; fore 

 part rather flat, its facets not larger than those elsewhere : sucker 

 black, pitchy and clothed with tawny hairs at the tip ; palpi black, 

 clothed with black hairs : feelers black, much shorter than the face ; 

 tip of the second joint ferruginous ; third joint linear, ferruginous 

 at the base, rounded at the tip, more than twice the length of the 

 second joint ; bristle nearly twice the length of the third joint : 

 chest bluish-green, with a whitish covering, and adorned with some 

 indistinct brassy stripes ; sides and scutcheon tinged with ferrugi- 

 nous and purple colour : breast mostly black ; abdomen obconical, 

 a little broader, but not longer than the chest ; first, second and 

 third segments ferruginous, adorned with blue-green and purple 

 reflexions, tinged with white along the fore borders ; fourth seg- 

 ment bright bluish green ; a furrow and a black stripe along the 

 back, and a notch at the tip of the abdomen ; under side tawny, 

 tinged with blue and green on the sides and towards the tip : legs 



4 F 2 



