FAM. EMPIDID/E 227 
Atalanta of authors, Meigen, Nouv. Classif. Mouches, p. 31 (1800); Hendel, Verh. Zool.-bot. Ges. 
Wien, Vol. 58, p. 60 (1908); Kertész, Cat. Dipt. Vol. 6, p. 120 (1909); Oldenberg, Arch. 
Naturges. Berlin, Vol. 80, A, p. 9, 92 (1915); Engel, Deutsche Ent. Zeitschr. 1918, p. 1-80, 197- 
268 (1918). 
Bergenstammia, Mik, Verh. Zool.-bot. Ges. Wien, Vol. 31, p. 326 (1881); Bigot, Bull. Soc. Ent. 
France, Vol. 12, p. 102 (1887); Coquillett, Proc. Ent. Soc. Wash. Vol. 5, p. 246, 262 (1903) ; 
Kertész, Rovert. Lapok, Vol. 18, p. 67 (1911); Engel, Deutsche Ent. Zeitschr. 1918, p. 75 (1918). 
Clinocera, s. str., Mik, Verh. Zool.-bot. Ges. Wien, Vol. 31, p. 320 (1881); Coquillett, Proc. Ent. 
Soc. Wash. Vol. 5, p. 248, 262 (1903); Proc. U. S. Nat. Mus. Vol. 37, p. 525 (1910); Kertész, 
Rovert. Lapok, Vol. 18, p. 67 (1911). 
Heleodromia of authors, Haliday, Ent. Mag. London, Vol, r, p. 159 (1833); Westwood, Gen. Syn. 
p. 132 (1840); Walker, List Dipt. Brit. Mus. Vol. 3, p. 503 [1849] (Helrodromia) ; Ins. Brit. Dipt. 
Vol. 5o, p. 104 (1851); Bigot, Ann. Ent. Soc. France (3). Vol. 5, p. 56r (1857); Bull. Soc. Ent. 
France, Vol. 12, p. 102 (1887); Lundbeck, Dipt. Dan. Vol. 3, p. 217 (1910); Kertész, Rovert. 
Lapok, Budapest, Vol. 18, p. 67 (1911). 
Hydrodromia, Macquart (not Hydrodromia, Scudder, Nomenclator 167 (1882); which is mistake for 
Hydromyia, Desvoidy), Hist. Nat. Dipt. Vol. 2, p. 658 (1835); Bigot, Ann. Soc. Ent. France (3), 
Vol. 5, p. 562 (1857); Coquillett, Proc. Ent. Soc. Wash. Vol. 5, p. 251, 262 (1903); Proc. U. S. 
Nat. Mus. Vol. 37, p. 554 (1910) ; Engel, Deutsche Ent. Zeitschr. 1918, p. 37 (1918). 
Kowarzia, Mik, Verh. Zool.-bot. Ges. Wien, Vol. 31, p. 325 (1581); Bigot, Bull. Ent. Soc. France, 
Vol. 12, p. 103 (1887); Coquillett, Proc. Ent. Soc. Wash. Vol. 5, p. 251, 262 (1903); Kertész, 
Rovert. Lapok, Budapest, Vol. 18, p. 67 (1911); Engel, Deutsche Ent. Zeitschr. 1918, p. 64 (1918). 
Paramesia, Macquart (not Stephens, Lefidoptiera, 1829), Hist. Nat. Dipt. Vol. 2, p. 656 (1835); Bigot, 
Ann. Soc. Ent. France (3). Vol. 5, p. 562 (1857); Coquillett, Proc. Ent. Soc. Wash. Vol. 5, 
p. 255 (1903); Proc. U. S. Nat. Mus. Vol. 37, p. 584 (1910). 
Phsaeobalia, Mik, Verh. Zool.-bot. Ges. Wien, Vol. 31, p. 326 [1881] (PAáobalia); Coquillett, Proc. 
Ent. Soc. Wash. Vol. 5, p. 255, 262 [1902] (PAáobalia); Kertész, Rovert. Lapok, Budapest, 
Vol. 18, p. 67 (1911); Engel, Deutsche Ent. Zeitschr. 1918, p. 5o (1918). 
Characters. — Medium sized, slender, olive-gray tomentose, long-legged flies that occur along 
water courses and in damp woods. . Head globular, slightly wider than high in those species with small 
cheeks, sometimes the mouth is prolonged far downward and the head is then much higher than wide, 
eyes widely separated, the face relatively broad. —Occiput rather flat, the neck located above the center 
but not far from the center, bristles and setule prominent, usually three pairs of proclinate vertical 
bristles; front broad, much shorter than the face, the ocelli on a prominent tubercle, the ocellar bristles 
divergent and proclinate, inserted closer together than the posterior ocelli; face broad, the lower edge 
transverse or peculiarly emarginate at the middle, cheeks variable, a more or less distinct suture between 
the gena and the bucce, which sometimes occurs as a deep notch. Eyes round or oval, densely 
pubescent, the facets uniform, the emargination at the antennze small. Antennz short, three-jointed, 
located high on the head and almost touching, but the sockets distinctly separated, the second joint 
globular, the third joint oval or onion-shaped, sometimes drawn out as a short process, with a thickened, 
two-jointed bare arista, whose basal joint is minute and whose apex is either blunt or pointed. 
Proboscis very short and thick, directed vertically down, the labrum formed into a broad chitinous visor 
overlapping the proboscis; palpi short, somewhat clavate, projecting, and usually but little hairy. 
Thorax long and narrow, with a flattened area in front of the scutellum, thickly coated with olivaceous 
