44 



OATALOauif. OF 



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Second joint of the bind tarsi shorter than the 

 second. - . _ _ . Camptottlus. 



Rostrum extending to the hind border of the 

 nietapeclus, or beyond it. 



Vertex not dilaled. _ . - - Loxops. 



Vertex dilated. 



Callus of the front stout, curved and prominent. - Litocoris. 



Callus of the front vertical, equally broad. 



Head above transverse. - - - . Xenocoris. 



Head above with nearly equal sides. - - Orthotylus. 



Second joint of the antennae very clavale or 

 thickly cylindrical in the male, thick clavate- 

 spindle-shiiped or compressed in the female. 



Rostrum extending- to the second ventral segment. Heterotoma. 



Rostrum extending to the hind border of the 

 metapectus. - . - - Heterocgrdylus. 



Head elongated. 



Second joint of the hind tarsi longer than the 

 others. - . . . . Orthocephalus. 



Third joint of the hind tarsi longer than the 

 others. - - - . . Labops. 



AreoJels of the wings with hooks. 



Second joint of the antennae spindle-shaped. - Atractotomus. 



Second joint of the antennaj clavate. 



Callus of the front proceeding from an almost 

 right angle. 



Xyphus swollen. 



Second joint of the antennae shorter than the 

 third. --.--. Haepoceea. 



Second joint of the antennae longer than the 



third. . - - - - Megalodactylus. 



Xyphus deepened. 

 Eyes elongated or oval. 

 Rostrum extending to the hind border of the 



metapectus. - _ . . . Oncotylus. 



Rostrum extending to the third or fourth ventral 



segment. - . - . . Conostkthds. 



Eyes round. ..... Anoterops. 



Callus of the front proceeding from a more or less 



acute angle or from a curve. 

 Xyphus swollen. 

 Callus of the front proceeding from a more or less 



acute angle. 

 Face oblique. - . - - . Tinicephalus. 



Fiice vertical. 



Face bent in the fore part. ... Tragiscus. 



Face straight in the fore part. 

 Proihorax Irapeziform. 

 Throat conspicuous. 

 First joint of the rostrum as long as the under 



side of the head. ... - Brachyoethrum. 



First joint of the rostrum extending to the middle 



of the xyphus. 



