614 LIST OF DIPTERA* 



clothed with short tawny hairs ; chest adorned with four dull tawny 

 stripes ; scutcheon tawny : abdomen obconical, rather longer and 

 broader than the chest, thinly clothed with short tawny hairs, 

 adorned with two tawny bands, which are broad and connected to- 

 gether on each side : legs black, clothed with short tawny hairs ; 

 shanks tawny towards the base ; feet covered beneath with tawny 

 down ; claws and foot-cushions tawny ; tips of claws black ; hind 

 thighs rather thick ; hind shanks slightly curved : wings gray ; 

 wing-ribs pitchy ; veins black, ferruginous towards the base ; poisers 

 pale yellow. Length of the body 6 lines ; of the wings 12 lines, 



a. St. Martin's Falls, Albany River, Hudson's Bay. Presented by 

 G. Barnston, Esq. 



Eristalis decisus, n. s., fern. Nigro-fuscus, scutelli fulvi disco 

 fusco, abdominis fasciis tribus ventreque jlavis, segmentorum mar- 

 ginibus posticis fulvis, antennis ferrugineis, pedibus fulvis,femo- 

 ribus basi nigris, tribus posiicis ferrugineis, tarsis anticis piceis 

 posticis nigris, alis subcinereis ad costam subfulvis. 



Body black : head clothed with short tawny hairs, and on the 

 crown with short black hairs, ferruginous in front ; sides of the pe- 

 ristoma black : mouth pitchy : feelers ferruginous : eyes pitchy ; 

 facets on the front of the crown rather larger than those elsewhere : 

 chest and breast covered with a brown bloom, thickly clothed with 

 short taw T ny hairs ; scutcheon tawny, its disk brown : abdomen ob- 

 conical, longer and broader than the chest, thinly clothed with very 

 short yellow hairs, adorned with three yellow bands ; first band very 

 broad on each side, interrupted in the middle; second band nar- 

 rower, with ferruginous marks, half interrupted in the middle; third 

 band still narrower, its hind border, concave ; hind borders of the 

 segments tawny ; underside pale yellow, tawny towards the tip : 

 legs tawny, clothed with short tawny hairs ; thighs black, tawny to- 

 wards the tips ; claws tawny, with black tips ; foot-cushions yellow ; 

 middle thighs tawny from the middle to the tips ; hind thighs 

 rather thick ; hind shanks ferruginous, slightly curved, tawny 

 at the base; fore feet pitchy ; hind feet black : wings slightly gray, 

 with a tawny tinge at the base and along two-thirds of the fore bor- 

 der ; wing-ribs pitchy ; veins black, ferruginous towards the base ; 

 poisers yellow. Length of the body 6 lines; of the wings 11 

 lines. 



a. Trenton Falls. Presented by E. Doubleday, Esq. 



