202 AV7A'cV 



hundreds of s; than a 



tiu I'nitccl States; but doubt 

 many more will be found. 



There are two well-marked sub-families. 



Sub-family I. TlNGITI] 



Th: :i includes nearly all of the k-iown Species, Here the 



-.Hum is usually Covered by an angular projection of the pro- 



notum ; and the wi: - have no distinction between the elavus, 



corium, and membrane. 



The genera that occur in the United States can be ! by 



the following tab 



A. Discoidal and costal areas of hemelytra rarely jointly elevated ; when so 

 elevated, the lateral margins of pronotum never broadly foliaceuus, nor with 

 the narrow foliaceous parts (wlicn they are present) produced ccphalad. 

 B. Rostral sulcus of the sternum not interrupted by a tra- 

 tween the mesosternum and metasternum). 



C. Costal area of hemelytra furnished with a regular single or double 

 series of areoles. 



D. Costal area with a single series of areoles. i. Tri.n >\f MIA. 



DD. Costal area with a double series of areoles. "NOIS. 



CC. Costal area of hemelytra, at least in part, furnished with a tri; 

 multiple, sometimes confused, series of areoles. 

 D. Joint I of antennae not twice as long as joint 2. 



E. Pronotum with a single longitudinal mesal ridge (carina) ; third 



joint of antennae not at all slender. 3. Li-.i-n" 



EE. 'im with three parallel longitudinal ridges (carina.') ; third 



joint of antenna- slender. 4. PHY> \ I >enil.A. 



DD. Joint I of antenna- at least twice as long as joint 

 E. Oblong, anal margins of hemelytra somewhat < 



5. Li PTOSTlh \. 



EE. Oval, anal margins of hemelytra con 



BB. Rostral snlcus of the sternum interrupt' < rnum 



an<: num by a tra' \ Nil A. 



AA. il and COS nu-lytra jointly elevated ; lateral margins 



n broadly foliaceou- phalad. 7. COUYTIM 



follo\viiiL, r species will an illustration of this siib- 



family. 



The Hawthorn Tint's, Corythucn arcuata. This I found \-ery 

 abundant in Washington, puncturing the under surface of the leaves 



* Prepared by I il. E. Summers. 



