THE JUMPING PLANT-LICE OR PSYLLID^ OF THE NEW WORLD. 133 



sharp marginal line in front differentiating it from genae. Genal cones 

 moderately long, conical, divergent, rather acute at apex, slightly 

 pubescent, deflexed from plane of vertex and descending almost 

 vertically. Antennae slender, about two and a half times as long as 

 width of head. 



Thorax strongly arched, coarsely punctate; pronotum long, ascend- 

 ing toward praescutum; latter rather long. Wings moderately large, 

 oblong-ovate, hyaline, slightly fiavous, a little more than twice as 

 long as broad, broadly rounded at apex; pterostigma long, closed, 

 yellow; radial margin with setae. 



Genitalia. — Male. — Genital segment large; forceps relatively short, 

 shaped like an ax blade, narrow at base, very broad at apex and 

 convexly rounded, with a large thick process on inner posterior 

 margin near base projecting inward to meet the process of the other 

 side; anal valve large, long, greatly broadened basally, profile tri- 

 angular. Female. — Genital segment short, stout, not very acute 

 at apex, valves subequal in length. 



Described from one pair from England (James Edwards), four 

 specimens from Scotland (O. M. Renter); eight from Washington, 

 District of Columbia (Hubbard and Schwarz), June; and about sixty 

 from Stanford University (H. Morrison), on leaves of Fraxinus sp., 

 in May. One female belonging to this species, or very closely related, 

 was taken on walnut leaves {Juglans regia) at Richfield Springs, 

 New York, in August, 1897; reported by E. P. Felt ('10: 39) as 

 injuring leaves of Fraxinus at Rochester, New York. The species 

 probably has a wider distribution than these records show. 



PSYLLOPSIS MEXICANA, new species. 



Figs. 46, 228, 438. 



Length of body 2.2 mm. ; length of forewing 3.1 ; width of head 0.92. 

 General color brownish yellow throughout. Body of medium size. 



Head about as broad as thorax, coarsely punctate, strongly descend- 

 ing ; vertex with a sulcate fovea on each side of median line extending 

 obliquely toward median Hne, anterior margin not sharply defined, 

 rounded downward toward genal cones. Genal cones almost as 

 long as vertex, projecting down almost vertically, scarcely divergent, 

 subacute at apex, pubescent. Clypeus large. Antennae very long 

 and slender, fully as long as body or over four times as long as width 

 of head. 



Thorax strongly arched, broad, coarsely punctate. Pronotum 

 long, ascending, distinctly broadened at median dorsal portion, with 

 lateral extremities rather narrow. Hind tibiae with a small spur 

 at base. Wings elongate, almost three times as long as broad, 

 sides subparallel, rounded at apex, hyaline, slightly browned, trans- 

 parent; first marginal cell much larger than second; pterostigma 

 long and narrow; veins dark brown. 



