696 



CONNECTICUT GEOL. AND NAT. HIST. SURVEY. 



[Bull. 



Oped form, while the pronotum is reduced in size and flattened in 

 correlation with the reduction in the muscles of flight. 



The taxonomic characters proposed by Stal have remained 

 adequate and are employed for the most part in the present 

 synopsis. 



Costal area (costal membrane of Stal ) 



Subcostal area (costal area of Stdl) 



Discoidal 



Areoles 



Fig. 164. Physatochila plexa Say, — illustrating wing of a Tingid, show- 

 ing areas and areoles. Greatly enlarged. Drawing by Dr. H. M. Parshley. 



Tribe TINGINI. 



The hemielytra have the areas distinguishable and usually dis- 

 tinctly outlined by strongly elevated main veins (Fig. 164) ; 

 anterior femora not abruptly thickened near base ; pronotum with 

 a more or less developed hood anteriorly; margins of pronotum 

 and hemielytra more or less dilated. 



Key to Genera. 



1. Bucculae widely separated in front,* exposing the insertion of the 



rostrum ; metasternal orifices obsolete 2 



Bucculae united or approximated in front, concealing the insertion 

 of the rostrum ; metasternal orifices usually distinct 4 



2. Lateral carinae low, simple ; surface not vitreous 3 



Lateral carinae of pronotum greatly developed, hemispherical; 



surface vitreous Galeatus, p. 703 



3. Third antennal segment more slender than the fourth, smooth, with 



few fine hairs Acalypta, p. 698 



Third antennal segment thickened, rugose, with numerous strong 

 setae Dictyonota, p. 699 



4. Metasternal orifices distinct; hemielytra not strongly channelled; 



pronotum usually tricarinate 5 



Metasternal orifices obsolete; hemielytra longitudinally channelled; 

 pronotum unicarinate Drakella,t p. 691 



* With a single recorded exception, Acalypta thomsonii Stal. 

 •f Drakella Bergroth (=^ Fenestrella Osborn and Drake) has not been 

 found as yet in New England. 



