254 - . DIPTERA 
Mantijeza, Rondani, Coquillett, Melander. Type : monostigma, Meigen, the only species, which 
is Precaloria, Fallen. ; 
Polydromia, Bigot. No species mentioned. — Type : frecatoria, Fallen, Coquillett's selection 
in 1903. quet 
Metachela, Coquillett. Type : collusor, Melander, Coquillett's designation. 
Hemerodromia, Melander (1902). 
Neoplasta, Coquillett. Type : scapularis, L.oew, Coquillett's designation. 
Cladodromia, Bezzi. "Type : iua, Bezzi. Two species were described, iuca was figured. 
Thanaiegia, nov. subgen. Type : defecta, Loew. 
4. Drymodromia, Becker. Type : Jeanneli, Becker, the only species. 
I. GENUS HEMERODROMIA, MEIGEN, S. STR. 
Hemerodromia, Meigen, Syst. Beschr. Vol. 3, p. 61 (1822); Rondani, Dipt. Ital. Vol. r, p. 148 
(1856); Coquillett, Proc. Ent. Soc. Wash. Vol. 5, p. 250, 261 (1903). 
Microdromia, Bigot, Ann. Soc Ent. France (3), Vol, 5, p. 557, 563 [1857] (Microdromyia) ; Williston, 
Trans. Ent. Soc. Lond. Vol. 3, p. 440(1896); Coquillett, Proc. Ent. Soc. Wash, Vol. 5, p. 253 
(1903); Melander, Williston's Man. p. 223 (1908); Bezzi, Nova Acta Akad. Naturf. Halle, 
Vol. 9t, p. 299 (1909); Coquillett, Proc. U. S. Nat. Mus. Vol. 37, p. 569 (1910); Engel, Deutsche 
Ent. Zeitschr. 1918, p. 4 (1918); Brunetti, Fauna Brit. India Dipt. Vol. 1, p. 366 (1920). 
Characters. — Apart from the general characters possessed by all the Hemerodromias as given 
previously, the following structures especially pertain to this genus. i 
Eyes large, the lower facets conspicuously enlarged so as to bring the eyes very close together 
on the middle of the face, the front short; style one-half to two-thirds as long as the third joint of the 
antennz and hairy. Thorax quadrate, when viewed from above, without distinct prescutellar depres- 
sion, the humeral grooves distinct; scutellum usually rather flat, as large as or larger than the 
metanotum, with a pair of well-separated setze; ovipositor usually short and conical. Front coxze thin, 
front femora setose. Costa greatly thinned beyond the fourth vein but the hind margin thickened at the 
very base, humeral crossvein wanting, the auxiliary vein bending forward and fusing with the costa 
close to thé base of the wing and later separating from it, the first vein ending before the middle of the 
wíng, second vein long and straight, pedicel of the second and third veins very short and completely 
atrophied, discal cell open outwardly, second posterior cell with a long petiole, anal cell wanting, the 
anal vein passing into the hind margin at its very root. 
Geographical distribution. 
t. H. albicoruis, Meigen, Syst. Beschr. Vol. 3, p. 64. pl. 23, f. 14 (1822); C. Europe. 
Macquart, Hist. Nat. Dipt. Vol. r, p. 348 (1834); Walker, Ins. 
Brit. Dipt. Vol. r, p. 144 (1851); Schiner, Fauna Dipt. Austr. 
Vol. t, p. 83 (1862); Gercke, Wien. Ent. Zeit. Vol. 5, p. 166, 
pl. 2, f. 12 (1886); Strobl, Mitteil. Nat. Ver. Steiermark, Graz, 
Vol. 29, p. 95 [1892] (Microdromia). 
—, H. bipunctata, Schummel, Arb. Schles. Ges. Vaterl. Kult. Breslau, p. 70 
(1832), no description. 
2. H. bivittata, Philippi, Verh. Zool.-bot. Ges. Wien, Vol. 15, p. 766(1865); Chile. 
Bezzi, Ann. Mus. Hungar. Vol. 3, p. 453 [1905] (Microdromia); 
Nova Acta Akad. Naturf. Halle, Vol. 9r, p. 390 [1909] (Microdromia). 
