238 A. L. MELANDER. 



Heuierodroinia notata Loew. 



Cent., ii, 53. 



Whitish, a median vitta of the fusco-testaceous thorax, the scutellum, metano- 

 tum and the abdomen black. Wings hyaline, discal cell oblong, quadrangular, 

 second posterior cell longer than its petiole; stigma rounded, black. Legs yel- 

 lowish, last tarsal joints black. 3 mm. 



Illinois (Le Baron). 



Henierodromia valida Loew. 

 Cent., ii, 51. 



Stout, cinereous; legs and halteres dark yellow. Discal cell of wings oblong, 

 quadrangular, second posterior cell much shorter than its pedicel, anal cell 

 obliquely truncate, stigma dilutely subfuscous. Dorsum with two narrow, rather 

 obscure vittse. Posterior tarsi apically fuscous. 4 mm. 



Hudson Bay Territory. 



Heinerodroinia prsecaioria Fallen. 

 Fallen, Empidse, 10, 12, 34. 

 Meigen, System. Beschr., iii, 62, etc. 



Pale yellow. Thoracic dorsum shining, brown, with a median rather broad, 

 grayish vitta. Antennae yellow, brown apically. Vertex and face silvery. Ab- 

 domen above with a broad (brown) stripe, emarginate at incisures. Tarsi hardly 

 darkened towards tip. Wings with brown veins. 4 mm. 



Hudson's Bay {fide Walker). 



Heinerodromia obsoleta Loew. 

 Cent., ii, 52. 



Whitish, subfuscous above, margin of thorax and nietanotum black. Wings 

 hyaline. Discal cell oblong, quadrangular, second posterior cell a little shorter 

 than its petiole. Stigma very faint, sublutescent. Legs whitish, last two tarsal 

 joints black. 3.5 mm. 



Illinois (Le Baron). 



Hemerodroiiiia paIIori»i Coquillett. 

 Mantipezn palloris Coq., Proc. Nat. Mus., 1895, 392. 



Head black, face, cheeks and lower front yellow, white pollinose. Thorax red- 

 dish yellow, marked with two slightly darker vitta and with a whitish stripe 

 between them ; pleurae reddish yellow; scutellum light yellow; metanotum red- 

 dish brown. Abdomen yellow, with a median dorsal indistinct brownish vitta. 

 Legs, halteres, antennae, proboscis and palpi yellow. Wings hyaline. 4-5 mm. 



New Hampshire. 



ARDOPTERA Macquart. 



Small, slender, almost bristleless flies. Head depressed, oval, the 



lower part carried in front. Antennae short, the third joint oval, 



compressed, the terminal style very long. Probo.scis short and 



thick, directed forwards. Legs slender, long; the fore co-xse shorter 



