IIEMIPTERA HETEROPTERA, 



45 



A 

 AA 



V 



00 







00 



++ 

 ++•»-«■ 



* 



+ 

 + 



§ 

 . §§ 



X 

 XX 



o 



00 



Second joint of the anlennsB thick and cylindrical 



iu the male, clavale in the female. - - Criocoris. 



Anteiince of the male antl female alike. 

 Second joint of the hind tarsi lonji;er than the 



third. ------ Plagiogkathus. 



Second joint of the hind tarsi as long as the 



third. ------ Apocremnus. 



Throat hardly conspicuous. 



Antenna; long. ----- Psallus. 



Antennae short. 



Hind tarsi short, stout. - - - - Sthenaeus. 



Hind tarsi long, slender. - - - Agalliastes. 



Proihorax elongaie-beil-shaped. 



Second joint of the hind tarsi longer than the 



third. ------ Malthacus. 



Second joint of the hind tarsi as long as the third. Auchenochepis. 



Callus of the front proceeding from a curve. 



Neck angular. ----- Camaeonotus. 



Neck rounded. ----- Phylus. 



Xyphus even or deepened. 



Xyphus even. 



Face vertical. ----- Gnostus. 



Face oblique. 



Second joint of the hind tarsi as long as the third. Hoplomachus. 



Second joint of the hind tarsi longer than the 



third. 

 Rostrum extending to the third or fourth ventral 



segment. ----- Pachyxvphus. 



Rostrum extending to the first ventral segment. - Plaoochilus. 

 Xyphus deepened. 



Throat about half as long as the head. - - Macrotylus. 



Throat as long as the head beneath. 



Head elongated. - _ . - Amblttylus. 



Head hardly elongated. - - - - Macrocoleus. 



Head elongated or oval. Eyes apart. 



Head elongated. - _ - - Maceolophus. 



Head oval or nearly round. 



Edge of the throat armed with two little teeth. - Odontoplatvs. 

 Edge of the throat unarmed. 



Prothorax trapeziform. - - - - Malacocohis. 



Prothorax elongated. 

 Base of the callus and insertion of the antennae 



between the eyes. - - - - Cyetopeltis, 



Base of the callus and insertion of the antennas 



lower. 

 Head oblique. ----- Systellonotus. 

 Head vertical. 



Head above little longer than its breadth behind. Brachycer^ea. 

 Head above nearly twice longer than its breadth 



behind.- ----- .Dictphus. 



