PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM 



SMITHSONIAN INSTITUTION 

 U. S. NATIONAL MUSEUM 



Vol. 106 Wwhington: 1956 No. 3363 



A REVISION OF THE FLIES OF THE GENUS RIVELLIA 

 (OTITIDAE, DIPTERA) OF AMERICA NORTH OF MEXICO ' 



By Ryoji Naniba ^ 



The genus Rivellia was established in 1830 by Robineau Desvoidy 

 to include three species, R. herbarum, R. mridulans, and R. hoscii. 

 Since then, as far as I know, papers by Loew (1873), Hendel (1914a), 

 and Cresson (1924) are the only ones of an extensive nature on the 

 Rivellia of America north of Mexico. 



The few papers mentioned above include no consideration of male 

 genitalia, which have proved to be exceedingly useful systematically 

 in other Diptera. Furthermore, these papers appear to be based on a 

 very limited amount of material. The group, therefore, seemed to be 

 Ln need of revision. 



Study of the male genitalia, wing banding, chaetotaxy, pruinosity, 

 color, and other characters has enabled me to recognize 30 species from 

 the above-mentioned geographical area. Of these, 13 are described 

 as new. Since the previously described species have been inadequately 

 described in regard to the characters which were found to be most 

 useful, they are redescribed more fully here. 



' This is paper No. 3158 of the Scientific Journal Series, Minnesota Agricultural Experiment Station, St. 

 Paul, Minn. 

 2 University of Hawaii, Hawaii Agricultural ErperimentiU Station, Honolulu, Hawaii. 



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