Proceedings of 

 the United States 

 National Museum 



SMITHSONIAN INSTITUTION • WASHINGTON, D.C. 



Volume 115 1964 Number 3479 



MOTHS OF THE GENUS RHABDATOMIS DYAR 

 (ARCTIIDAE: LITHOSIINAE) 



By William D. Field 



The genus of moths treated in this paper is neotropical in distribu- 

 tion and contains 13 species, 5 of which are described as new. One 

 of these species was included formerly in a second genus, for which a 

 type designation needs to be made. The following discussion will 

 clarify the nomenclature. 



Hampson (1900, pp. 517, 518) described as new the genus Diar- 

 hahdosia with two included species: Eustixis minima Butler and 

 Lithosia laudamia Druce. Although Hampson usually selected a type 

 species for his genera, he failed to do so for this genus. Hampson 's 

 second included species, Lithosia laudamia Druce, is congeneric with 

 Rhabdatomis zaba Dyar, the sole species included in Rhabdatomis by 

 Dyar (1907, p. 227). 



In order to preserve both names, Diarhabdosia and Rhabdatomis ^ 

 and also because Hampson used the "first species rule" in selecting 

 types for the genera of other authors, I designate as type species of 



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