NORTH AMERICAN HOMOPTERA. 253 



A SYIVOPSIK OF THK »$UBFAlfIIL,IES A]V» GKIVRRA OF 

 THF HIFilIBRACID^ OF SJORTII AMERICA. 



BY F. W. GODING, M.D., PH. D. 



Synopsis of Subfamilies. 



.4. Scutellum distinct, produced beyond metanotum, apex usually sinuate and 



furnished with acute apical angles CENTROTIN^ Stal. 



B. Scutellum obsolete or wanting, not extending beyond metanotum. 

 a. Tarsi of equal length, or posterior longer than anterior. 

 h. Tibife simple, 

 c. Tegmina behind clavus folded, outside coriaceous, opaque, with scarcely 

 distinguishable veins externally ; clavus and interior basal cell of 

 corium toward apex widened, intermediate apical cell of coriuni 



petiolate in the coriaceous part TRAGOPIN^ Stal. 



cc. Tegmina entirely membraneous, veins distinct. 



d. Third apical cell elongate, never petiolate DARNING Stal. 



dd. Third apical cell subtriaugular, petiolate, adjacent cells contiguous. 



SMILIIN^Stal. 



66. Tibiae and sides of face dilated, foliaceous MEMBRACIN.^ Stal. 



na. Posterior tarsi small, shorter than anterior HOPLOPHORIN..E Stal. 



Synopsis of Genera. 



Subfamily Centrotinje Stal. 

 Tribe Aethalionini Godg. 



A. Thorax with no posterior process extending beyond scutellum. 



a. Prothorax horned above lateral angles Tolailia Stal. 



na. Prothorax unarmed above lateral angles Aetlialioii Latr. 



Tribe Centroiini Godg. 



B. Thorax giving off a posterior process extending beyond scutellum. 

 a. Clavus gradually attenuated to apex. 



6. Anterior tibise dilated I«ycoderes Germ. 



66. Anterior tibise simple. 

 c. Above lateral angles armed on each side with a stout horn. 



Ceiitriichus Stal. 

 cc. Above lateral angles unarmed. 



d. Back of prothorax developed into a rounded gibbosity. 



Ceiitrofloutus Godg. 

 dd. Back of thorax simple. 



e. Posterior process of thorax long, acutely narrowed to apex, cover- 

 ing internal margin of tegmina Deliiiiiioya Leth. 



ee. Posterior process very short Microceiitrus Stal. 



TRANS. AM. ENT. SOC. XIX. SKPTEMBER, 1892. 



