

FURTHER STUDIES OF TYPES OF AMERICAN MUSCOID 

 FLIES IN THE COLLECTION OF THE VIENNA NATU- 

 RAL HISTORY MUSEUM 



By J. M. Aldrich 



Associate Curator, Division of Insects, United States National Museum 



The work of classifying the American muscoid flies has been seri- 

 ously retarded by the impossibility of recognizing many species from 

 the original descriptions, which were written at a time when many 

 important characters had not yet been discovered. For American 

 workers there is the added obstacle that the type specimens are 

 mosth' in European museums. 



To overcome the difficulty as far as possible the authorities of the 

 Vienna Natural History Museum have generously entrusted to the 

 writer a series of eight shipments of type specimens for study and 

 redescription. The present paper is a report on the latest shipment. 

 The earlier ones were reported in four papers, of which the first 

 three were in the Annals of the Entomological Society of America.^ 

 The fourth paper was published in the Proceedings of the United 

 States National Museum;- it contains a list of all the species 

 included in the first three. 



In the present paper the species are numbered consecutively with 

 (hose already reported. 



Genus ZELIA Robineau-Desvoidy 



Zelia Robineau-Desvoidy, Myodaires, 1830. p. 314. 



Leptoda Van der Wulp, Tijclsch. v. Ent., vol. 28, 1885. p. 196 ; Biologia, Dipt.. 



vol. 2, 1891, p. 250.— Bbaueb and Bbbgenstamm, Zweifl. Kais. Mus., pt. 6, 



1893, p. 133. — Aldbich, Annals Ent. Soc. Amer., vol. 18, 1925, p. 123. 

 Melaleuca Van deb Wulp, Biologia, Dipt., vol. 2, 1891, p. 247.— Bbaueb and Ber- 



GENSTAMM, Zweifl. Kais. Mus., pt. 6, 1893, p. 183.— Aldrich, Annals Ent. Soc. 



Amer., vol. 18, 1925, p. 123. 

 Euzclia TovPNSEND, Proc. Biol. Soc. Washington, vol. 28, 1915, p. 23. 



The genus Zelia originally included several species, of which Co- 

 quillett 3 designated the first, rostrata Robineau-Desvoidy, as type, at 

 the same time stating that it is a synonym of Dexia vertehrata Say. 



' Vol. 17, 1924, pp. 209-218 ; vol. 18, 1925. pp. 107-150 and 456-469 



- Vol. 72, ait. 7, 1927, pp. 1-35. 



■'' Proc. U. S. Nat. Mus., vol. 37, 1910, p. 621. 



No. 2764.-PROCEEDINGS U. S. NATIONAL MUSEUM. VOL. 74. ART. 19 



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