854 LIST OF DIPTERA. 



Dexia testacea. Diaphania testacea, Macq. Dipt. Exot. ii. 121, 1, 

 jrf.l4,/.-& 



a. New Holland. Presented by the Haslar Hospital. 



b, New Holland. Presented by the Entomological Club. 



Dexia Aditha, n. s., mas. Cyaneo-viridis, capite piceo, thorace 

 vittis quatuor arneis, scutello abdomineque ferrugineis, cyaneo 

 purpureoque micantibus, abdomine nigro vittato fasciisque albis 

 ornato,palpis fulvis apice piceis, antennis piceis basi ferritgineis, 

 pedibus ferrugineis tarsis nigris, alls cinereis. 



Body clothed with black hairs and bristles : head pitchy, 

 adorned with a white covering, thickly clothed beneath with pale 

 yellow shining hairs ; a deep brown stripe widening from the eye- 

 lets to the feelers ; epistoma tawny, very prominent ; sides of the 

 face fringed with bristles for nearly half the length ; face ferrugi- 

 nous, with a ridge in the middle and a furrow on each side : eyes 

 red, separated on the crown by a narrow interval ; fore part flat, its 

 facets rather larger than those elsewhere : sucker pitchy, tawny and 

 clothed with yellow hairs at the tip; palpi tawny, long, slender, 

 curved, clothed with tawny hairs, pitchy and clothed with black 

 hairs at the tips : feelers ferruginous, much shorter than the face ; 

 third joint pitchy, linear, conical at the tip, ferruginous at the base, 

 about twice the length of the second joint; bristle black, downy, 

 much more than twice the length of the third joint, its first and se- 

 cond joints short: chest bluish green, with a slight white covering; 

 fore part adorned with four brassy stripes ; disk of the hind part and 

 scutcheon ferruginous, with bluish purple reflections ; hind border 

 of the scutcheon armed with black spines : breast dark green, partly 

 clothed with tawny hairs : abdomen obconical, half transparent, fur- 

 rowed on the back, notched in the tip, a little longer and broader 

 than the chest, ferruginous with bluish green and purple reflections ; 

 fore borders of the segments adorned with white lustre ; a black 

 stripe along the middle of the back ; hind border of the third seg- 

 ment armed with black spines ; segments beneath successively more 

 and more retracted towards the base ; legs dark ferruginous, clothed 

 with black hairs and bristles ; feet black ; foot-cushions pitchy : 

 wings slightly gray ; a brown spot near the base ; wing-ribs and 

 veins tawny ; veins black towards the borders ; tip cross-vein form- 

 ing a slightly obtuse angle with the fourth longitudinal vein, a little 

 curved inward near the base, straight from thence to the tip, where 

 it is slightly curved outward, joining the border at some distance 

 above the tip of the wing ; lower cross-vein much curved inward 

 near the base, slightly curved outward from thence to the tip ; 



