AMERICAN PSYLLIDAE li 351 



plates not raised plate-like, emarginate anteriorly. Anterior ocellus below 

 cmargination of frontal plates in angle of facial cones, slightly visible from 

 above. Facial cones short, quite strongly divergent, rounded a])ically, almost 

 horizontal, visible from above, pubescence sparce, tine and short. .\ntenn;e 

 inserted at base of cones without and slightly above ; two basal segments 

 large, the rest filiform, darker than two basal ones. 



Thorax scarcely arched, finel)- punctate; pronotuni somewhat longer than 

 usual but depressed below head, ascending to dorsulum ; dorsulum scarcel\ 

 ascending, subequal in length with scutum. Wings hyaline, about two and 

 one-third times as long as broad, broadest across first marginal cell, rather 

 acute at tip ; without maculae ; radial cell unusually short ; first marginal cell 

 flistinctly larger than second ; apex of wing distinctly within second marginal 

 cell : venation light colored, not conspicuous. 



female. — Genital segment large and heavy, almost as long as rest cf 

 abdomen, broadly rounded apically ; pubescence sparse, moderately long : style 

 exserted. about half as long as genital segment, acute, dorsal blade over- 

 reaching ventral. Male. — Abdomen slender. Genital segment short, about 

 one-fourth as long as rest of abdomen ; claspers triangular in shape, broad at 

 base, quite acute at tip ; anal segment produced dorsally into a broad process, 

 concave toward claspers, subacute at tip : pubescence moderately sparse, rather 

 short. 



Described from one female and two males, taken by C. F. Daker at 

 Claremont, California (mountains). 



Trioza nigrifrons n. sp. 



(Fig. 28 L; 129 I; 130 E.) 



Length of body. 2.2 mm. : length of forewing, 3.6 mm. ; greatest width of 

 wing, 1.4 mm.; width of vertex between eyes, .49 mm.; with eyes, .71 mm. 

 General color, orange vellow, abdomen whitish ventrally, face and facial cones 

 black. 



Head not deflexed, very finely punctate ; with eyes almost as broad as 

 thorax. Posterior margin of vertex slightly arcuate, narrowly elevated ; dis- 

 cal area of frontal plates with a shallow depression triangular in shape, the 

 apex near posterior margin of vertex ; median suture arcuatel\- elevated, 

 emarginate anteriorly ; frontal plates raised somewhat plate-like. Anterior 

 ocellus imbedded at angle of facial cones under the slightly overhanging 

 vertex, not visible from above. Facial cones black, moderately long, con- 

 tiguous in basal two-thirds, distal third slightly divergent, subacute at tip. 

 subvertical and slightly visible from above, scarcely pubescent, more coarsely 

 punctate than head. Antennae inserted on frons slightly without and partially 

 on base of cones ; two basal segments large, remaining segments destroyed. 



Thorax slightly arched, more coarsely punctate than head. Pronotuni 

 ver\- short, depressed below dorsulum and head, barely visible from above. 

 Dorsulum triangular, roundly pointed anteriorly, slightly ascending, almost 

 as long as scutum. Wings hyaline, about two and two-thirds times as long 

 as broad, broadest across first furcal vein, subacute apically; radius fully as 

 long as second cubital ; fourth furcal terminating at apex of wing. 



