212 
of Psyllidce” by Mr. John Scott. For the benefit of those who may 
desire to investigate this interesting group of insects, I insert here the 
author’s synoptical table of genera. 
Brief Synopsis of the Genera. 
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Arytciena. 
Psylla. 
A. Face produced into two lobes of greater or less length; antennae 
10-jointed; 1st and 2d joints short, stout, remainder filiform; 3d 
generally longest. 
a. Elytra coriaceous; costa without a stigma; cubitus petiolate 
Livilla. 
aa. Elytra membranaceous. 
b. Apex of elytra rounded. 
c. Costa without a stigma; cubitus petiolate. 
cc. Costa with a stigma; cubitus petiolate. 
bb. Apex of elytra lanceolate. 
c. Costa with a stigma; cubitus petiolate. Spanioneara. 
cc. Costa without a stigma; cubitus not petiolate. Trioza. 
AA. Face not lobate. antenme 10-jointed; first and second joints (ex¬ 
cept in Lima ) short, stout, remainder filiform; 3d generally 
longest. 
a. Elytra membranaceous; apex rounded. 
aa. Elytra coriaceous; more or less lanceolate. 
b. Costa with a stigma; cubitus petiolate. 
bb. Costa without a stigma; cubitus petiolate. 
Aphalara. 
Phinocola. 
Lima. 
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