FAM. EMPIDID/E 225 
a fold below the humeral crossvein, outth vein arising near the base of the anal cell, its origin not 
abrupt, anal cell apically truncate by the rectangular anal crossvein, the anal vein continuing as a spur 
beyond the lower angle of the anal cell. 
Taxonomy. — Haliday erected the genus H eleodvomia for four species, immaculata, bipunctata, 
stagnalis and fontinalis. Curtis (Brit. Ent. 1834) designated zmmaculata as the type for Heleodromia, and 
Macquart (Hist. Nat. Dipt. Vol. 2, p. 658, 1835) repeated this. Macquart removed s/agnalis and 
bipunclata to a new genus Hydrodromia, to which also belongs fontinalis,. M ik (Verh. Zool.-bot. Ges. 
Wien, Vol. 31, p. 325, 1881) placed £ipunctata in his new genus Kowarzia. "Thus by elimination, stagnalis 
is left as the type of the group Hydrodromia. Haliday, in a manuscript note, published in Westwood's 
Intrbduction, Generic Synopsis, p. 132 (1840), proposed to substitute Sciodromia as the generic name for 
immaculata, but did not give a valid reason for the change.  Microcera was erected by Zetterstedt for 
rostrata, which is a synonym of zmmaculata : his manuscript name for this insect was Macroura. 
'The species of Heleodromia occur in Europe and in Western North America. 
Geographical distribution, 
I. H. curtipes, Becker, Deutsche Ent. Zeitschr. ip. 645 [1910] (Scrodromia). Corsica. 
2. H. immaculata, Haliday, Ent. Mag. London, Vol. 1, p. 159 (1833); Curtis, Europe. 
Brit. Ent. Vol. 8, p. 513 (1834); Macquart, Hist. Nat. Dipt. Vol. 2, 
p. 658 (1835); Meigen, Syst. Beschr. Vol. 7, p. 93 [1838] (Hemero- 
dromia), Walker, List Dipt. Brit. Mus. Vol. 3, p. 505 (1849); 
Scholz, Zeit. Ent. Breslau, Vol. 5 (19), p. 56 [1851] (Sciodromia) ; 
Walker, Ins, Brit. Dipt. Vol. r, p. 107, pl. 4, f. 1 [1851] (Sciodromia) ; 
Schiner, Fauna Dipt. Austr. Vol. 1, p. 86 [1862] (Sciodromia) ; Strobl, 
Mitteil. Nat. Ver. Steiermark, Graz, Vol. 29, p. 98 [1892] (Sciodromia); 
Wahlgren, Ent. Tidskr. Vol. 3r, p. 86 [1910] (Sciodromia); Frey, 
Acta Soc. Sc. Fenn. Helsingfors, Vol. 37 (3), p. 68 [1913] Sciodromia). 
fuscipennis, Woser, Correspondenzbl. Landw. Ver. Würtemb.-Stuttgart, 
Vol. z, p. 53 [1840] (Hemerodromia). 
rostrata, Zetterstedt, Fauna Ins. Lappon. p. 572 [1838] (Microcera) ; Dipt. 
Scand. Vol. 1, p. 440 [1842] (Microcera) ; ibidem, Vol. 8, p. 3046 [1849] 
(Microcera); Bonsdorff, Finl tváv. Ins. Dipt. Vol. 1, p. 176 [1861] 
(Microcera); Siebke, Nyt. Mag. Naturv. Vol. i2, p. 1:09 [1864] 
(Microcera). 
3. H. pectinulata, Strobl, Glasnik, Zem. Mus. Bosn. Herceg. Sarajevo, S. Europe. 
Vol. ro, p. 399 [1898] (Sciodromia); Wissensch. Mitth. Bosn. Her- 
ceg. Sarajevo, Vol. 7, p. 56r [1900] (Sciodromia). 
4. H. fullaía, Melander, Trans. Amer. Ent. Soc. Vol. 28, p. 345 [19o2] W. United States. 
(Sciodromia) ; Kertész, Cat. Dipt. Vol. 6, p. 123 [1909] (Hydrodromia) ; 
Engel, Deutsche Ent. Zeitschr. 1918, p. 48 [1918] (Hydrodromia). — 
PI. T,Fig. 68. 
—. * Sp. innom. Meunier, Miscell. Ent. Vol. 7, p. 178 (1899). Baltic Amber. 
Il. GeNUs ROEDERIOIDES, CoQUILLETT 
Roederioides, Coquillett, New York State Mus. Bull. Vol. 47, p. 585 (1901); Melander, Trans. Amer. 
Ent. Soc. Vol. 28, p. 239 (1902); Coquillett, Proc. Ent. Soc. Wash. Vol. 5, p. 257, 263 (1903); 
Bezzi, Ann. Mus. Hungar. Vol. 3, p. 363, note (1905); Melander, Williston's Man. N. Amer. 
Dipt. p. 223 (1998); Coquillett, Proc. U. S. Nat. Mus. Vol. 37, p. 6or (1910); Engel, Deutsche 
Ent. Zeitschr. 1918, p. 264 (1918). 
