LIST OF DIPTERA. 477 



with pale yellow down, the former beset with some tawny bristles, 

 the latter armed with long pale yellow bristles : eyes bronze ; fore 

 part flat, composed of facets larger than those of the other part, 

 from which it is clearly distinguishable : lip black, shining, its tip 

 ferruginous and clothed with yellow hairs ; palpi black, hairy, their 

 tips beset with bristles: feelers tawny; first and second joints 

 clothed with very few hairs ; second joint a little shorter than the 

 first ; third joint tapering from the base to the tip, much longer 

 than the first ; fourth joint or the bristle much longer than all the 

 preceding joints : chest beset with some tawny bristles on the sides 

 and towards the hind border ; four irregular brown stripes occupy 

 most of the disk : breast hoary, which colour blends with tawny on 

 the sides of the chest : abdomen brown, nearly linear, much nar- 

 rower than the chest and much more than twice its length, clothed 

 with short yellow hairs ; hind borders of the segments, especially on 

 each side, tawny : legs tawny, beset with tawny bristles and hairs ; 

 hips covered with pale tawny down ; trochanters and knees piceous ; 

 feet clothed with black hairs and bristles ; claws black ; foot-cushions 

 tawny: wings with a tawny tinge, especially at the base and along 

 the fore border ; wing-ribs ferruginous ; veins piceous, ferruginous 

 at the base, black at the tips; poisers pale tawny. Length of the 

 body 5 lines ; of the wings 9 lines. 



a. Isle of France. 



Ommatius Amyclaeus, n. s., mas. et fem. Niger, thoracis vittis dua- 

 bus flaws, lateribus scutello pectoreque albis, abdominis segmen- 

 torum suturis lateribusque fulvis, ventre cinereo, antennis pedi- 

 busque nigris, femoribus tibiisque basi rufis, alis subfuscis, 

 mari. dilatatis. 



Body black : head nearly as broad as the chest, covered with white 

 down, clothed behind and beneath with white hairs, beset behind 

 the eyes with black bristles ; tubercle of the eyelets beset with a few 

 black bristles ; clypeus armed with white bristles on the fore part, 

 and with a few long black bristles behind and on the adjoining part 

 of the front: eyes bronze; fore part nearly flat, its facets much 

 longer than those of the other part : lip black, clothed at the tip 

 with short yellow hairs ; palpi black, yellow towards the tips, clothed 

 with white hairs : feelers black ; first joint clothed with a few tawny 

 hairs ; second joint a little shorter than the first and beset with some 

 short black bristles ; third joint conical, a little longer than the first ; 

 bristle nearly or twice the length of all the preceding joints : fore 

 chest, scutcheon, hind chest, sides and breast white ; disk of the 

 chest black, adorned with two pale yellow slightly curved stripes, 

 which are widened in front when they join the sides, and also behind . 



