1922] Melander — Microsania, a New Genus of the Platypezidce 47 



the species have been found running about on a tent while in 

 camp in the woods. Quite a few of the specimens are heavily 

 parasitized by mites, of which several species are distinguishable, 

 clustering on the underside of the abdomen. 



Summary. 



The genus Microsania, hitherto assigned to the EmpididaB, 

 belongs to the Platypezidse. There exist in America two species, 

 idential with two of the three European species. One of these, 

 M. stigmaticalis, has previously been known from North America 

 only through its original finding which was recorded under the 

 name of Platycnema imperfecta. The genus is widely distributed 

 from Alaska to Florida and Central America and apparently 

 from its prevalence in Northern Europe and the mountainous 

 districts of Western America has a circumpolar range. 



Bibliography of the Species of Microsania. 

 pallipes Meigen. C. Europe 



Meigen, Syst. Bes. vi. 356 (1830) Cyrtoma 

 Macquart, Hist. Nat. Dipt. i. 360 (1834) Cijrtoma 

 Rondani, Dipt. Ital. Prodr. i. 138 (1856) Platytelma 

 Bigot, Ann. Soc. Ent. Fr. (3) v. 557 and 564 (1857) 



Microcyrta 

 Schiner, F. A. Dipt. i. 76 (1862) Cyrtoma 

 Lioy, Atti. Inst. Ven. (3) ix. 723 (1863) Pachypeza 

 pectipennis Meigen C. and N. Europe; W. N. America 



Meigen, Syst. Bes. vi. 356, pi. Ixvi. f. 15, 16 (1830) 



Cyrtoma 

 Zetterstedt, Dipt. Sc. i. 335 (1842) pectinipennis; viii. 



3013 (1849) pectinipes 

 Wahlgren, Ent. Tidskr. xxxi. 47 (1910) pectinipennis 



stigmaticalis Zetterstedt N. Europe; and N. and Cent. America. 

 Zetterstedt, Lapp. 534 (1838) Cyrtoma 



Dipt. Sc. i. 334 (1842); viii. 3013 (1849); 



xiii. 4998 (1859); 

 Bonsdorff, Finl. tv. Ins. i. 157 (1861) 

 Lundbeck, Dipt. Dan. iii. 19, f. 3 (1910); 



