293 



altogether membranous, or with a large upper area in large part 

 or altogether membranous, and a lower plate chitinous. First 

 pair of abdominal spiracle's situated dorsally within the exterior 

 }>roduced part of the metanotum. Third to eighth pairs situated 

 essentially laterally, and in large part or altogether turning out- 

 wards. 



Ocelli more rarely evanescent, more often two at the sides of 

 the head in front of the antennae ; sometimes a third ocellus 

 is found on the lower margin of the front near the base of the 

 ciypeus. 



xA.ntennae inserted under the eyes ; flagellum composed of a 

 thicker basal segment and a very slender ''seta," either articulate 

 or altogether divided into numerous segments. Tegula almost 

 always present. Empodium coalesced with the claws through- 

 out a shorter distance, and at most through two-thirds of a 

 length of the claws ; free margin a little emarginate or simple. 

 Second pair of abdominal spiracles dorsal, somewhat remote 

 from t'he lateral margin 4. Fulgoridae. 



Two years later, Van Duzee considered that the North Amer- 

 ican Cicadina were composed of nine families, Cicadidae, Mem- 

 bracidae, Fulgoridae, Cercopidae, Ulopidae, Ledridae, Bythos- 

 copidae, Tettigonidae and Jassidae, the last five being collected 

 into a super-family, Jassoidea. The Tettigonidae were divided 

 into Tettigonina and (iyponina; the Jassidae into Acocephalina, 

 Jassina (Dorydini, Deltocephalini. Athysanini, Jassini and Cica- 

 dulini) and Typhlocyl)ina. 



I shall refer later, to Van Duzee's classification of the Jassoi- 

 dea, so tha't I now reproduce the characters for reference. It 

 should however be noted, in fairness to Van Duzee, that he ex- 

 pressly restricts his classification to the North American Fauna : 

 at the same time, the main points of his scheme are largely in 

 use, 



Superlamily Jassoidea. 



"Ocelli on the face l:)elow the anterior edge of tlie head. 



h'amily Bytliosc()f<idac. 



Ocelli on the disc of the vertex T^^amily Tctfisioiiidac. 



Ocelli on or near the anterior edge of the head, or wanting. 



Familv .hissidac. 



Family Tcftii^oiiidac. 

 iM-ont large, prominent, strongly convex, cheeks long and 

 narrow, anterior edge of the head ol)tuse, or rounded. 

 Subfamily I'cttigonida Berg. 



