AMERICAN PSYLLIDAE II 3S9 



Head deflexed, with eyes not as broad as thorax, finely punctate. 

 Posterior margin of vertex very narrowly elevated over middle half, arcuate, 

 not emarginate at median suture ; discal area with a small fovea midway be- 

 tween median suture and each posterior ocellus, and a shallow divergent de- 

 pression extending about to anterior margin of eyes, frontal plates raised 

 plate-like, emarginate at median suture anteriorly and sutural angle of each 

 plate deflexed making double emargination. Anterior ocellus not visible 

 from above. Facial cones rather long, strong divergent, acute, subvertical and 

 not visible from above, sparsely pubescent. Antennze inserted between base 

 of cones and eyes ; insertion cone-shaped, converging to point on each side 

 of anterior ocellus. 



Thora.x strongly arched, punctate. Pronotum short, depressed below 

 dorsulum and head, with a small fovea on each side just above pleurites. 

 Dorsulum strongly ascending, narrowly rounded anteriorly, quite coarsely 

 punctate. Wings subhyaline, fulvous, about two and one-half times as long 

 as broad, broadest across first marginal cell, rounded apically but not broadly 

 so; radius fully as long as second cubital, flexed midway; marginal cells 

 subequal; venation brownish, anal angle black or dark brown. 



Female. — Genital segment short, a little longer than anal ventral segmental 

 plate ; dorsal plate overreaching ventral, and less acute ; genital pore contiguous 

 to and about as long as anal dorsal segmental plate ; ventral plate with an up- 

 curved acute prolongation ; pubescence inconspicuous. Male — Abdomen re- 

 curved caudad, much slenderer than in females; dorsal segmental plates de- 

 pressed beyond third and scarcely visible from side. Genital segment as 

 long as two preceding, semierect ; claspers very small and short, triangular 

 when viewed laterally ; anal projection small, simple erect, about twice as 

 long as broad and slightly broader than base of claspers ; pubescence short, 

 sparse and inconspicuous. 



Described from numerous males and females collected in Colorado by 

 C. F. Baker. Type in National Museum. 



This species is apparently closely related to T. aurantiaca. 



Trioza fulvida var similis n. var. 



Although this species presents more or less gradual variations, still there 

 seems to be a quite distinct varietal group which has the forewings hyaline and 

 not fulvous as in the species. The structural characters are the same in both 

 groups. 



Described from several males and females taken in Colorado by C. F. 

 Baker. Type in National Museum. 



Trioza longicornis n. sp. 



Figs. 128 U; 129 M: 130 T.) 



Length of body, 2.4 mm. ; length of forevving, 3.6 mm. ; greatest width, 

 1.5 mm.; width of vertex between eyes, .45 mm.; with eyes, .72 mm. General 

 color greenish yellow, notum slightly darker. 



Head scarcely deflexed, conspicuously lower than dorsal margin of 

 dorsulum, very finely punctate. Posterior margin of vertex arcuate, narrowly 



