The Psei.aphid^ of North America. 21 



length. Sides parallel from the obliquel}' transverse tempora 

 to the antennal tubercles; front produced into a triangle; eyes 

 conical; occiput not elevated, with a short carina at the 

 base; between the eyes are two slightly impressed foveee; the 

 sulcus scarcely visible; the triangular part of the front, 

 anterior to the inter-antennal line, is obhquely declivous in a 

 line with the porrected clypeus; the whole upper surface 

 scabrous. AntcnncB pubescent, robust, as long as the head 

 and prothorax together; first joint obconical, twice as long as 

 the second and of equal width; second to fourth joints equal, 

 wider than long; hfth to eighth equal, as thick as the preced- 

 ing, rounded, as long as w'ide; ninth wider, obconical; tenth 

 (6) large, globose, as wide as the last ioint, which is ovate; 

 tenth ($) oval, transverse, wider than the ninth; the last 

 ovate, thicker than the tenth, pubescent, with short, coarse 

 hair. PaJfi with the last joint straight inside, arcuate out- 

 side. Prothorax as wide as the head, length and width equal, 

 widest before the middle, evenly convex from side to side, 

 punctate, base twdce as wide as the neck, carinate in the mid- 

 dle to the deep median fovea; median sulcus deep, nearly en- 

 tire, the transverse sulcus interrupted by the discal carinas and 

 the acute tubercles each side of the median fovea; discal cari- 

 nas entire, crenulate, and continued to the base behind the 

 spinous tubercle; lateral sulcus entire, ending behind in a large 

 lozenge-shaped fovea. Elytra thinly punctulate, length equal 

 to that of the prothorax plus one-half the head; the width 

 across the low spinous shoulders is one-sixth greater, and across 

 the tip two-thirds greater than that of the prothorax. Basal 

 fovece three, small, deep, conspicuous, discal lines very fine 

 and sharp, but inconspicuous, not reaching beyond the humeral 

 elevation ; sutural lines straight, convergent, the intervals very 

 regularly punctured. Abdoincn densely pubescent, ver}- con- 

 vex, the basal segment much depressed at the base, the trian- 

 gular margin broad at the base; the carinte are one-third the 

 length of the segment and one-fifth of the width; the fourth 

 dorsal is longer, the last (?) acute at the tip, not produced. 



