THE WING VENATION OF THE CERCOPIDiE.* 



Z. P. Metcalf. 

 INTRODUCTION. 



The present paper is the third and last of a series of papers 

 on the wing venation of the Homoptera by the writer. The 

 other papers have been pubHshed in the Annals of The Ento- 

 mological Society of America, Volume VI (Metcalf 1913a 

 and 1913b). These two papers together with one by Funk- 

 houser (1913), one by Miss Patch (1909) and the present paper 

 complete the studies of the wing venation of the families of the 

 Order Homoptera, Comstock and Needham (1898-1899) having 

 discussed the wing venation of the' Cicadidas in their original 

 paper on the wings of insects. 



In my studies of the wing venation of the Cercopidas I have 

 used about the same technique that was used in studying the 

 wing venation of the Jassidas and Fulgoridae. That is, the 

 nymphal wing pads were removed from specimens that had been 

 killed in weak formaldehyde and mounted on a slide under a 

 cover glass. These preparations were drawn by the aid of the 

 Edinger drawing apparatus, various combinations of objective 

 and oculars being used. Afterwards these drawings were care- 

 fully compared with fresh mounts of wings from other specimens 

 and if it was found to be incorrect in anyway the original draw- 

 ing was discarded and a new drawing made. As noted below, 

 material was limited in certain genera but it is believed that 

 most errors have been eliminated. 



The adult wings from which the drawings were made were 

 dissected out and mounted in balsam. From wings thus mounted 

 drawings have been made by means of the Edinger drawing 

 apparatus. The drawings of the adult wings are not intended 

 to give a picture of the wing in any sense of the word but are 

 supposed to show the course of the veins. No attempt has 

 been made to represent the width of the veins, the lines drawn 

 simply showing the main axes of the veins. 



*Contributions from the Department of Zoology and Entomology of the 

 North Carolina Agricultural College and Experiment Station No. 6. 



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