AMERICAN PSYLLIDAE II 349 



of wing at termination of fourth furcal : venation very slightly darker than 

 wing membrane, not conspicuous. 



female — Genital segment large, fully two-thirds as long as rest of abdo- 

 men ; both plates about equal in length, moderately pubescent ; ovipositor ex- 

 serted, almost as long as genital segment, slender, acute at tip, much darker 

 than abdomen. 



Described from one female, taken by Prof. C. F. Fiaker at Claremont, 

 California (mountains'). 



Trioza niaciilata n. sp. 



(Figs. 128 C, D: 129 B: 130 D. ) 



Length of body, 2.3 mm.; length of forewing, 3.1 mm.; greatest width of 

 forewing, 1.05 mm.; width of vertex between eyes, .39 mm.; with eyes, .62 

 mm. General color greenish white, abdomen dorsally dark brown. 



Head not deflexed ; with eyes almost as broad as thora.x ; very finely 

 punctate. Posterior margin of vertex arcuate, emarginate at median suture, 

 distinctly elevated ; with a fovea midway between median suture and posterior 

 ocellus in each side and a diverging depression extending downward toward 

 face, a sharp line of depression extending from fovea to near the front 

 margin of eye and to center of median suture on each side ; frontal plates 

 not raised plate-like, emarginate anteriorly at median suture. Anterior ocellus 

 mibedded at angle of facial cones and under the slightly overhanging vertex, 

 scarcely visible from above. Facial cones moderately long, horizontal, visible 

 from above, thick and scarcely divergent in basal half, smaller and more 

 divergent in distal half, rounded apically, slightly angled outwardly at center ; 

 pubescence rather long and sparse. Antennae inserted at base of cones without, 

 insertion extending downward almost to center of cone ; two basal segments 

 large, subglobose, remaining eight segments filiform, dark brown at tip of 

 each segment, the rest light brown. 



Thorax only slightly arched, more coarsely punctate than head. Pro- 

 notum long, arcuate, not depressed below dorsulum and head ; with a small 

 acute projection midway on anterior margin ; dorsulum horizontal ; scutum 

 slightly descending, indistinctly marked with three brownish stripes. Wings 

 hyaline, three times as long as broad, broadest across first furcal ; with a 

 large brown macula covering most of both marginal cells and distal half 

 of cubital cell, and another less distinct covering most of inner basal cell; 

 radius shorter than second cubital ; first marginal cell somewhat longer than 

 second; moderately rounded at tip. with fourth furcal terminating at ape.x. 



Female. — Abdomen dark brown dorsally, ventrally mottled brown and 

 greenish-white. Genital segment almost one-half as long as rest of abdomen, 

 moderately acute at tip, quite densely pubescent ; dorsal plate slightly longer 

 than ventral plate and less acute ; ovipositor not exserted. 



Described from one female from Arizona, in the C. F. F)aker collection. 

 Type specimen in the National Museum. 



