1933] The Fulgorid.e of Eastern North America 147 



genital aperture is prolonged into variously shaped lobes or plates, 

 which may be known as the genital plates. In a few cases there is a 

 single median tooth on the ventral margin, the genital tooth. Look- 

 ing directly into the genital aperture one can usually see the dia- 

 phragm which almost completely divides the genital chamber into an 

 outer and inner chamber. The dorsal margin of the diaphragm is 

 sometimes straight transverse and is sometimes variously armed or 

 toothed, genital armature, these teeth are frequently prolonged and 

 hook-like, genital hooks. The outer genital chamber contains two 

 style-like plates, the genital styles, which are of various sizes and 

 shapes. The following terms are used in describing them : outer and 

 inner margins; apex with inner and outer angles. The adsgus lies 

 in the inner genital chamber and projects posteriorly through the 

 genital orifice. The tenth abdominal segment is modified into the 

 anal segment which is armed ventrally with one or two hook-like pro- 

 cesses, the anal processes. The eleventh segment constitutes the anal 

 style. 



Various modifications of the genitalia exist in the other subfamilies 

 but so far as I am aware no one has attempted to homologize the 

 genital structures of the different subfamilies of the FulgoridcB. 



Classification 



The classification adopted is substantially that of Van Duzee's 

 Catalog of the Hemiptera of America North of Mexico (1917). 

 Wherever additional synonomy has been used it is clearly indicated 

 under the genera or species concerned. Otherwise the student is re- 

 ferred to this excellent catalog for matters of nomenclature. As 

 stated elsewhere the writer is far from satisfied with the present ar- 

 rangement of subfamilies but as our chief interest in this paper is 

 the identification of genera and species a thorough revision of the 

 higher divisions need not concern us greatly. 



The key given below is based as far as possible upon two con- 

 trasting characters. Having used it repeatedly during the past three 

 years, on material from all parts of the country, no one is more fa- 

 miliar with its weaknesses than the writer. Nevertheless it is an at- 

 tempt to stabilize our knowledge of the classification of the Fulgoridce 

 and to make easier the path of the beginner. The characters used 

 throughout are what appear to the writer to be the most obvious ones 

 available. These characters have been taken entirely from forms in 



