224 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 109 



(Meigen). Of these, immacvlata is an agromyzid, a synonym of 

 Phytoliriomyza perpusilla (Meigen), The specimen upon which the 

 lone record of ornata was based (Tucker, 1909, Trans. Kans. Acad. 

 Sci., vol. 22, p. 303) cannot be located, but the name should probably 

 be eliminated from the New World fauna, at least untU the status of 

 true ornata in Europe is clarified. It has usually been considered 

 a synon3'-m of maculata, but the type has not been re-examined in the 

 light of the latest revision of the Palaearctic species by Collin (1952, 

 Proc. Roy. Ent. Soc. London, ser. b, vol. 21, pp. 110-116). Odinia 

 maculata has been recorded from North America several times, but 

 thus far I have not seen maculata, as elucidated by Collin, in Nortli 

 American material. At least three of the species recognized in this 

 paper — conspicua, meijerei, and betulae — have been called maculata 

 in older identifications. 



The species of Odinia whose habits are known have been reared 

 in association with wood-boring beetles or from trees attacked by 

 such beetles, or, less commonly, by larvae of cossid or other moths. 

 The larvae of at least one species were found in a Polyporus fungus, 

 although this might also have been in association with the work of 

 coleopterous larvae. In general, it appears probable that the larvae 

 are saprophagous. Adult flies have been taken on Polyporus fungi, 

 rotting stumps, tree trunks, and at bleeding wounds on trees. A new 

 species from Puerto Rico and the Virgin Islands has been caught 

 several times in fruit-fly traps. 



Brues, Melander, and Carpenter (1954, Classification of Insects, ed. 

 2, p. 377) are in error in giving four dorsocentral bristles as a family 

 character. The typical genus Odinia, which contains most of the 

 species in the family, has five dorsocentrals (1 presutural, 4 post- 

 sutural). The other genera known to me — Traginops, Schildomyia, 

 Neoalticomerus — have four. 



In the present paper the figure numbers correspond to the species 

 numbers, for the convenience of the user. The wings of all nine 

 included species are figured. Specimens examined are in the U. S. 

 National Museum (USNM), Canadian Department of Agriculture 

 (CDA), American Museum of Natural History (AMNH), Museum of 

 Comparative Zoology (MCZ), and the author's collection. 



Genus Odinia Robineau-Desvoidy 



Odinia Robineau-Desvoidy, 1830, Essai sur les Myodaires, p. 648. Two species, 

 trinotata and Peleterii, both new. Type-species, 0. trinotala R.-D.= 

 O. maculata (Meigen), by designation of Rondani, 1875, Bull. Soc. Ent. 

 Ital., vol. 7, p. 2. 



The genus Odinia will key to the Agromyzidae in the family key in 

 Curran (1934, Families and Genera of North American Diptera) 



