BKENDEL SYNOPSIS OF FAMILY OF PSEI.APHID^. 299 



a Tarsi with a single claw. Posterior coxa; distant. 

 Max. palpi excessively long, the second and 

 fourth joint pedunculate -clavate, very long. 

 Max. palpi long, the second joint clavate -pe- 



PsELAPHUs Herbst 



duiiculate, the third triangular, the fourth long 

 securiform ..... Tychus Leach 



a' Posterior coxse proximate. Tarsi with a single 



claw. Body linear, depressed - Rhinoscepsis Le Conte 



II. Anfenuie distant, inserted on the sides of the head beneath 

 short, distant, not porrected tubercles. 



a Posterior coxje distant. Claws, only one fully 

 developed. 



b'" Body broad, transversely eliiptico-cylindrical in 

 the cross-cut. Abdomen more or less broadly 

 margined. 



c" Abdominal margin retuse, narrow ; dorsal seg- 

 ments subequal : the two basal ventrals longer ; 

 elytra narrow- shouldered, very long. Vertex 

 bifoveate. 



Last palpal joint long-securifrom, with a rudi- 

 mentary hair-shaped second claw. 



Bythinus Aube ( Mac hcer lies ) 



Last palpal joint ovate-acuminate, short; tarsi 



with a single claw - - Eutrichites Le Conte 



c' Abdominal margin broadly retuse, the basal seg- 

 ments of the dorsum and ventre much longer, 

 tarsi with a single claw {Bryaxini). 



Vertex bifoveate or foveae wanting, prothorax 

 utiifoveate, antenna' lo-jointed with the club 

 3-jointed ; body broad, sexual marks on the 

 intermediate thighs, elytral lines and abdomi- 

 nal carinas long parallel - Decarthron Brendel 



Vertex not foveate, prothorax faintly trifove- 

 <ite, undersurface of the head bicarinate, body 

 broad, antennal club 3 jointed - - NisAxis Casey 



