LIST OF DIPTERA. 515 



Sabgus Andreas, n. s., fem. Cyaneo-viridis, scutelli apice fulvo, ab- 

 domine cyaneo-nigro pilis canis bifasciato basi fulvo, antennis 

 nigris, pedibus flavis, femoribus cyaneo -nigris, alls cinereis ad 

 costam fusco maculatis. 



Head blue, broader than the chest, tawny in front : mouth yel- 

 low : feelers black : eyes dark red : chest and breast bluish green, 

 clothed with short pale hairs ; tip of the scutcheon tawny : abdomen 

 bluish black ; hind borders of the third and of the fourth segments 

 adorned with bands of hoary hairs ; second segment tawny : legs 

 pale yellow ; hips and thighs bluish black ; tips of the latter tawny : 

 wings gray, a small brown spot on the middle of each fore border ; 

 wing-ribs ferruginous ; veins pitchy ; poisers yellow. Length of the 

 body 5 lines ; of the wings 10 lines. 



Sabgus annulipes, n. s., fem. Purpureo-cyaneus, clypeo fulvo, an- 

 tennis pedibusque nigris, femoribus apice tarsisque basi fulvis, 

 tibiis basi flavis, alisfuscisad costam nigro-fusco fasciatis. 



Body dark blue : head a little broader than the chest, clothed 

 with short black hairs ; clypeus tawny : eyes bronze ; facets very 

 small: mouth black: feelers black; first and second joints short, 

 clothed with short black hairs ; third joint very long, tapering from 

 the base to the tip, nearly thrice the length of the first and second ; 

 bristle much shorter than the third joint: chest and abdomen very 

 finely punctured, covered with tawny down : abdomen tinged with 

 purple, nearly elliptical, a little longer and broader than the chest : 

 legs black, clothed with hoary down ; tips of thighs tawny ; shanks 

 yellow towards the base ; feet tawny at the base: wings brown, each 

 with a dark brown band a little beyond the middle of the fore bor- 

 der ; wing-ribs and veins piceous ; poisers yellow. Length of the 

 body 4i lines ; of the wings 10 lines. 



Sabgus vespertilio, Fabr. Syst. And. 259, 14. Wied. Auss. Zweif. 



ii. 29, 4. Chysochlora vespertilio, Macq. Hist. Nat. Dipt. i. 



258, 2. 

 a. Venezuela. From Mr. Dyson's collection. 



Sargus Echemon, n. s., fem. Flavus, capite fulvo, thoracis vittis 

 duabus fuscis, abdomine fulvo vittis piceis, antennis fulvis, pedi- 

 bus flavis, femoribus fulvis, alis fulvis apice fasciaque fuscis 

 margine postico cinereo. 



Head tawny, a little broader than the chest: eyes pitchy, 

 slightly bronzed ; facets on the fore part of the crown rather larger 



