THE GENERA OF THE TETTIGINIID INSECTS OF THE 

 SUBFAMILY RHAPHIDOPHORINAE FOUND IN AMERICA 

 NORTH OF MEXICO. 



By A. N. Caudell, 



Of the Bureau of Entomology, United States Department of Agriculture. 



The subfamily Rhaphidophorinae is represented in the United 

 States and Canada by 12 genera. Many changes in the classifica- 

 tion of the group have been made since the revisional work of Scud- 

 der, and the present nomenclatm-e is quite different from that of 

 Scudder's catalogue of 1900. One new genus and several new 

 species have appeared since the beginning of the new century, and 

 the present paper, which is based primarily on material in the United 

 States National Museum, adds two more genera and seven species. 



Besides the material in the United States National Museum there 

 has been studied material from the Hebard collection, in Philadelphia, 

 kindly loaned by the owner, and free access has been accorded the 

 writer to the rich collections of the Academy of Natural Sciences 

 in Philadelphia and of the Museum of Comparative Zoology in Cam- 

 bridge, Massachusetts. 



The only revisional work done on the Nearctic genera of Rhaphi- 

 dophorinae was by Scudder in 1894,* where keys to the genera and 

 species as then known are given. The group was not considered 

 by Scudder as of subfamily rank, a standing now quite generally 

 conceded, but was designated by him as a section of Stenopelmatinae, 

 as was previously done by Brunner in his general monograph.^ 



In studying the structure of the posterior tibiae in the Rhaphi- 

 dophorinae it is well to remember that there are three apical calcars 

 on each side — one short ventral one, a longer median one, and 

 an upper one. This upper calcar is sometimes wholly dorsal, and 

 when, as is sometimes the case — as, for example, in Rhachocnemis — 

 it is directed upward instead of more or less backward, as usual, 

 there is Httle or nothing to distinguish it from the dorsal spm-s. In 

 such cases care must be taken to not mistake this upper calcar for 

 a dorsal spur. 



1 Proc. Acad. Arts and Sci., vol. 30, pp. 17-32. 



2 Verhandl. k. k. zool. hot. Ges., vol. 38, 1S88, pp. 247-394, pis. 5-9. 



Proceedings U.S. National Museum, Vol. 49— No. 2130. 



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