﻿356 POMONA COLLEGE JOURNAL OF ENTOMOLOGY 



and inconspicuously pubescent. Antennae inserted above base of cones, slightly 

 without. 



Thorax arched, punctate. Pronotum quite short, depressed below dor- 

 sulum and head ; dorsulum quite strongly ascending, with a brownish spot 

 on each side of median line anteriorly ; roundly pointed at anterior margin. 

 Wings hyaline, about two and one-third times as long as broad, broadest 

 across first marginal cell, round and very slightly angulated apically ; radius 

 somewhat flexed midway, fully as long as second cubital ; first furcal very 

 short : venation inconspicuous. 



Male.— Abdomen slender; dorsal segmental plates very short, reaching 

 about to middle of third ventral segment ; anal end of abdomen dorsally con- 

 cave. Genital segment moderately large, semi-erect ; claspers quite long, 

 simple, laterally opposed, recurved at tips ; anal projection long, spatulate when 

 viewed from the side, anterior margin longer than posterior ; upper margin 

 with several conspicuous hairs ; pubescence sparse. 



Described from three males taken by C. F. Baker at Claremont, Cali- 

 fornia (mountains). 



Trioza niarginata n. sp. 

 (Figs. 128 P; 129 G; 130 O.) 



Length of body, 2.2 mm. ; length of forewing, 3.3 mm. ; greatest width, 

 1.2 mm. ; width of vertex between eyes, .44 mm. ; with eyes, .71 mm. General 

 color, orange yellow, abdomen whitish ventrally, antennse and legs light 

 colored. 



Head somewhat deflexed, with eyes not quite as broad as thorax, very 

 finely punctate ; posterior margin of vertex arcuate, narrowly elevated, not 

 emarginate at median suture ; discal area with an oblique and diverging de- 

 pression on each side extending from near median suture posteriorly toward 

 insertion of antennae : vertex scarcely emarginate anteriorly at median suture, 

 distinctly overhanging and concealing anterior ocellus when viewed from 

 above. Facial cones rather short, subacute, only slightly divergent, sub- 

 vertical and not visible from above, darker than vertex, very sparsely pube- 

 scent. Antennse inserted between lower margin of eye and base of facial 

 cone, a trifle within ; two basal segments large as usual in genus, the re- 

 maining segments slender, filiform. 



Thorax arched, finely punctate. Pronotum moderately short, depressed 

 below dorsulum and head ; dorsulum quite heavy, ascending to scutum, about 

 equal to scutum, in length, roundly pointed anteriorly. Wings hyaline, except 

 lower margin bordered with brown stripe extending through marginal cells 

 and from anal angle to apex of wing ; a little less than three times as long as 

 broad, broadest across first furcal ; somewhat angulate on radial margin 

 apically, quite acute ; radius distinctly shorter than second cubital. 



Female. — Abdomen quite stout. Genital segment very short, scarcely 

 longer than anal segment ; dorsal plate slightly overreaching ventral, arched 

 dorsally; both plates with short, acute, beak-like projection apically; posterior 

 dorsal surface of anal segment concave, with genital pore partially concealed 



