Pomona Coi-legiv Journal of Kntomology 433 



Head quite strongly deflexed, very slightly inipiinctate, witli eyes not as 

 broad as thorax. Posterior margin of vertex arcnate. slightly elevated over 

 middle (ine-third, scarcely emarginate at median suture; vertex scarcely raised 

 plate-like; discal area with a small fovea on each side posteriorly and a shallow 

 ilivergent depression extending downward toward front. Facial cones short, 

 vertical, scarcely divergent, almost straight and parallel cm imier margin. (|uite 

 acute, pubescence short and sparse, .\ntennre inserted cm frons and side of 

 facial cones ; form of antennre as usual in genus. 



Thorax not strongly arched, more coarsely punctate than vertex, rath-.r 

 slender. Pronotum short, depressed below head and dorsulum, nearer to level 

 of dorsulum than of head. Dorsulum ascending, about as long as scutum. 

 Metastemal spurs short. IVings hyaline, very slender, fully three times as 

 long as broad, broadest across first marginal cell, subacute apically ; first 

 furcal quite short, second and fourth subequal ; venation brownish yellow, not 

 conspicuous. 



Female. — Genital segment very short, about as long as two preceding ter- 

 gites ; dorsal plate very slightly longer than ventral, very broadly rounded 

 apically ; ventral plate acute and somewhat beaked at tip ; pubescence short 

 and sparse. 



Described from three females from .\rizona in the C. F. leaker collection. 



Trioza minuta similis Crawf. 



Body small, slightly larger than species. Vertex very similar in form ; 

 facial cones less parallel and straight on inner margin, more divergent. 

 Thoracic characters very similar to species. Wings slightly larger, but simi- 

 larly veined. Female genitalia quite similar to species. Male. — Cienital seg- 

 ment rather short ; claspers slender, simple, incurved apically. .Anal valve 

 proportionately rather large, bilobate. with posterior lobe. 



Described from several males and fonales from Oregon in the C. F. ISakcr 

 collection. 



Trioza quadripunctata Crawf. 

 (Fig, 152. E; 153, II; 154, C; 155, D) 



Length of body 2.3 mm.; length of forewing 3.3 mm.; greatest width 1.5 

 mm. ; width of vertex between eyes .42 mm. ; with eyes .71 mm. General color 

 greenish yellow; antenna; black in distal half. 



Head deflexed, somewhat punctate, with eyes almost as broad as thorax. 

 Posterior margin of vertex narrowly elevated over middle two-thirds, slightly 

 arcuate; vertex not elevated plate-like; discal area with a small fovea on 

 each side between median suture and posterior ocellar area, and a sulcate de- 

 pression extending obliquely toward front and lower margin of eye; broadly 

 and deeply emarginate anteriorly at median suture, and protruding bilooateiv 

 over frons; median suture distinctly emarginate; facial cones medium in length, 

 rather acute, quite .strongly divergent, usually subvertical. sometimes almost 

 horizotital. ]nibescence rather sparse and brief, .-\ntennre inserted mider pro- 



