HEMIPTERA HETEROPTERA. 



41 



B. Membrane with double generally elongate trian- 

 gular rectilinear or curvilinear areolets. 

 a. First joint of the hind tarsi twice or thrice longer 



than the second joint. 

 * Prothorax as broad as long, reverse-trapeziform, 

 much straightened hindward. Mesothorax un- 

 covered. - 

 ** Prothorax elongate-trapeziform. Mesothorax 

 covered, 

 f Head with rounded sides. ... 

 ft Head with parallel sides. 

 | Prothorax with no rim on the fore border. 

 § Cheek-plates short, almost semicircular. 

 X Tip of the vertex truncated, even. 

 o Rostrum extending to the second ventral segment. 

 oo Rostrum extending to the hind border of the 

 mesopectus. - 

 X X Tip of the vertex conical. 

 -h First joint of the rostrum longer than the under 

 side of the head. .... 

 h — )■ First joint of the rostrum as long as the under 

 side of the head. - 

 §§ Cheek-plates long, linear. 



X First joint of the rostrum longer than the under 

 side of the head. - _ - - 



XX First joint of the rostrum as long as the under 

 side of the head. - 



|| Prothorax with a rim on the fore border. 

 § Sides of the prothorax foliaceous or sharp-bordered 

 X Tip of the vertex forming a prominent cone. 

 XX Tip of the vertex rounded. 



o Eyes half-round. Rostrum extending to the hind 

 border of the metapectus. - 



oo Eyes oval, almost reniform. Rostrum extending 



to the hind border of the mesopectus. 

 §§ Sides of the prothorax truncated or rounded. 

 X First joint of the hind tarsi not thicker than the 

 other joints. 

 o Second joint of the antennae clavate. 

 oo Second joint of the antennae linear. 

 XX First joint of the tarsi much thicker than the two 

 following joints. 

 o Second joint of the antenna; clavate. First joint 

 of the hind tarsi cylindrical. - 

 oo Joints of the antennas cylindrical. First joint of 

 the hind tarsi clavate. - - - - 



b. First joint of the hind tarsi shorter than the 



second joint, or equal to it in length. 

 * Head above transversely oval or triangular. Eyes 



contiguous, or nearly so. 

 f Prothorax in front with a rim or swelling. 

 | Neck arched, with no transverse border or rim. 



Myrmecoms. 



PlTHANUS. 

 MlRIS. 



Brachytropis. 



NoTOSTIRA. 

 IjOBOSTETHUS. 



Megaloceroea. 



TfitGONOTYLUS. 



acetropis. 



Leptopterna. 

 Teratocoris. 



Cremxocephalus. 

 Oncognathus. 



Alloeotomus. 

 Pachypterna. 



