556 LIST OF DIPTERA. 



Xylota Corbulo, n. s., fern. JEnea^ capite cyaneo, abdominis macu- 

 lis quatuor ventreque fulvis, antennis nigris, pedibus ceneis, tarsis 

 fulvis, tarsis posticis tibiisque piceis, alis cinereis. 



Body brassy, clothed with short tawny hairs : head dark blue, 

 a little broader than the chest, clothed behind and beneath with 

 white down, and adorned with a patch of white down on each side 

 of the front : eyes reddish bronze ; facets small : mouth and feelers 

 black : sides of abdomen covered with white down ; its back adorned 

 with four tawny spots ; underside mostly tawny : legs clothed with 

 short tawny hairs ; hips and thighs brassy ; shanks piceous, tawny 

 at the base ; feet tawny ; hind feet piceous ; claws black, tawny at 

 the base ; foot-cushions tawny : wings gray ; wing-ribs and veins 

 black, the latter piceous towards the base; poisers tawny. Length 

 of the body 5\ lines ; of the wings 10 lines. 



a. ? From Mr. Children's collection. 



Xylota Libo, n. s., fern. JEneo-purpurea, abdomine rufo, antennis 

 nigris basi ferrugineis, pedibus ceneis, tibiis piceis, tarsis fulvis, 

 alis subfuscis. 



Body brassy purple, thinly clothed with tawny hairs : head and 

 fore part of the chest covered with tawny bloom : eyes dark red, pi- 

 ceous in front; facets small: mouth black: feelers black ; first joint 

 ferruginous ; bristle tawny : abdomen dark red, slightly pitchy on 

 the sides and hind borders of the segments : legs thinly clothed 

 with short hoary hairs ; hips and thighs brassy ; shanks piceous, 

 tawny at the base ; feet tawny, piceous at the tips ; hind shanks 

 darker than the other shanks, ferruginous at the base; claws 

 and foot-cushions tawny, tips of the former black : wings slightly 

 brown, darker along the fore borders; wing-ribs piceous; veins 

 black, dark ferruginous towards the base ; cross-veins clouded with 

 brown ; poisers tawny. Length of the body 5 lines ; of the wings 8 

 lines. 

 a. Nova Scotia. From Lieut. Redman's collection. 



Xylota Anthreas, n. s., mas. JEnea, fronte ventreque fulvis, abdo- 

 minis lateribus chalybeo maculatis, antennis f us cis, pedibus ceneis, 

 tibiis anterioribus piceis, tarsis fulvis , alis subcinereis. 



Body brassy, clothed with tawny down : head tawny in front : 

 eyes piceous ; facets small : mouth black : feelers brown ; bristle 

 black : sides of abdominal segments adorned with large steel blue 

 spots ; underside tawny, except the tip : legs bronze black, clothed 

 with short tawny hairs ; shanks yellow at the base ; four front 

 shanks piceous, tawny at the base and at the tips : feet tawny : 



