374 ! DIPTERA 
2. GENUs MICROSANIA, ZETTERSTEDT - 
Microsania, Zetterstedt, Isis, Vol. 1, p. 3o (1837); Fauna Ins. Lappon. p. 534 (1838); Dipt. Scand. - 
Vol. r, p. 333 (1842); Bigot, Ann. Soc. Ent. France (6), Vol. 9. p. 123 (1889); Melander, Man. 
N. Amer. Dipt. p. 225 (1908); Lundbeck, Dipt. Danica, Vol. 3, p. 18 (1919); Wahlgren, Ent 2 
Tidskr. Vol. 3t, p. 43, 47 (1910); Melander, Psyche, Vol. 29, p. 43-48 (1922). taceat 
Microcyrta, Bigot, Ann. Soc. Ent. France (3). Vol. 10, p. 537, 564 (1857); Coquillett, Pod E 
Soc. Wash. Vol. 5, p. 253 (1903). 5. 
Pachypeza, Lioy (not Serville, Coleoptera, 1835), Atti. Inst. Sc. sies Venezia [2 Vol. u» p. ga 5 
(1863); Coquillett, Proc. Ent. Soc. Wash. Vol. 5, p. 255 (1903). MIR 
Platytelma, Rondani, Dipt. Ital. Vol. r, p. 138 (1856); Coquillett, Proc. Ent, Soc. Wu Vol. i. 
p. 256, 261 (1903). : 
Characters. — The species of Mícrosanía look much like Bicellaría with which genus a Mh 
repeatedly been associated. —Microsamia departs from all Empid genera in possessing a large and. 
inflexed hypopygium and a single median row of acrostichal hairs. The costa is setulose and is inter- - 
rupted at the end of the first vein, the anal cell is pointed, the proboscis is short and fleshy, and. the 
middle tibiz: possess apical bristles. | 
'T'he genus belongs to the Platypezid:e, as discussed by the writer in Psyche jor April Todo. : 
being closely related to Ofetia and Platycenema,  Loew recognized the Platypezid relationships when he 
described one of the American species as Plalycuema imperfecla, — The other European writers have all | 
located Microsania with the Empidid:z. | Almost none of the Empidid:e are common to both Europe - 
and North America, but two of the three species of Microsazia occur on both continents. 
Type species : M. stigmalicalis, Zetterstedt. i e dos D 
Geographical distribution, 
1. M. fpallipes, Meigen. Syst. Beschr. Vol. 6, p. 356[1830](Cyrtoma); Macquart, C. pe x 
Hist. Nat. Dipt. Vol. 1, p. 360 [1834] (Cyrloma); Rondani, Dip. — a 
Ital. Vol. r. p. 138 [1856] (Platytelma); Bigot, Ann. Soc. Ent. Pm asd croi aa 
France (3). Vol 5, p. 557, 564 (1857) (Microcyrta); Schiner, Fauna ENERO 
Dipt. Austr. Vol. 1, p. 76 [1862] (Cyrtoma) ; Lioy, Atti. Inst. Veneto, * 
Sc. Venezia (3), Vol. 9. p. 723 [1863] (Pachypesa). à bio: 
2. M. peclipenuis, Meigen, Syst. Beschr. Vol. 6, p. 356, pl. 66, f. 15, 16 [1830] Europe, North America. 
(Cyrtoma); Zetterstedt, Dipt. Scand. Vol. t, p. 335 [1842] (7ectíni- 
pennis); ibidem, Vol. 8, p. 3013 [1849] (fectinipes); Wahlgren, Ent. 
Tidskr. Vol. 31, p. 47 [1910] (Pectinipeunts); Melander, Psyche, 
Vol. 29, p. 46 (1922). Pub 
3. M. stigmaticalis, Zetterstedt, Fauna Ins. Lappon. p. 534 [1838] (Cyrfoma); Europe, North & Central 
Dipt. Scand. Vol 1, p. 334 (1842); ibidem, Vol. 8, p. 3013 (1849); ^ America. 
ibidem, Vol. 13, p. 4998 (1859); Bonsdorff, Finl. tvàv. Ins. Dipt. 
Vol. t, p. 157 (1861); Lundbeck, Dipt. Dan. Vol. 3, p. 19, f. 3 (1910); 
Wahlgren, Ent. Tidskr. Vol. 3r, p. 47, f. 3 (1910); Frey, Acta Soc. 
Sc. Fenn. Helsingfors, Vol. 37 (3), p. 8 (1913); Melander, Psyche, 
Vol. 29, p. 46 (1922). 
imperfecta, Loew, Berl. Ent. Zeitschr. Vol. 9 : Cent. 6, No. 82 [1865] (Platye- 
nena); Aldrich, Cat. Dipt. N. Amer. p. 342 [1905] (? Platyenema). 
