LIST OF DIPTERA. 345 



yellow bristles on each side ; third segment very long, with the 

 usual cross furrow ; the following segments successively decreasing 

 in length ; fourth and succeeding segments ferruginous, shining, 

 furrowed with very slight and small cross lines ; tip armed with 

 short black spines ; under-side more dull : legs ferruginous, clothed 

 with short black hairs ; hips, thighs above, knees, tips of shanks 

 and of feet black ; shanks and feet armed with black spines ; claws 

 black ; foot-cushions yellow ; fore legs not armed ; wings yellowish 

 brown, dark gray along the fore borders, adorned with a dark blue 

 lustre ; wing-ribs and veins black ; poisers pale tawny. Length of 

 the body 8 lines; of the wings 15 lines. 

 a. East Indies. From Archdeacon Clerk's collection. 



Group XII. 



Dasypogon Sura, n. s., mas. Niger, pilis albis vestitus, thorace albo 

 quadrivittato, abdomine apice rufo, antennis pedibusque nigris, 

 tibiis anterioribus fulvis, alis nigro-fuscis. 



Body black : head as broad as the chest, white and clothed with 

 white hairs behind and beneath, where the hairs are long, thick and 

 silky ; sides of the crown covered with a few black hairs ; clypeus 

 beset with black bristles : eyes bronze ; fore part quite flat and 

 composed of large facets : lip black, shining, ferruginous at the tip, 

 with short tawny hairs at the tip ; palpi black and clothed with 

 black hairs : feelers black ; first and second joints beset with a few 

 short black hairs ; second joint slightly club-shaped, as long as the 

 first ; third joint broader, spindle-shaped, longer than the first and 

 the second joints; fourth and fifth joints rudimentary: a row of 

 hairs along the sides of the fore chest : chest thinly clothed with 

 short black hairs, beset on each side and behind with black bristles, 

 adorned with four white stripes, of which the middle pair are 

 straight and narrow, the side pair are broader and follow the curve 

 of the chest : breast clothed with white silky hairs : abdomen cylin- 

 drical, very slightly tapering from the base towards the tip, where it 

 again widens, narrower than the chest and less than twice its length, 

 clothed with white silky hairs, which disappear towards the fore 

 border of each segment ; first and second segments short ; third and 

 following segments long, but successively decreasing in length to 

 the tip, which is red and shining : legs black, clothed with short 

 black hairs, and beset with some black bristles ; tips of feet furnished 

 with some long hairs ; claws black ; foot-cushions tawny ; fore 

 shanks and middle shanks tawny beneath ; fore shanks unarmed : 



