434 Pomona College Journal of Entomology 



Iniding vertical lobes above base of facial cones ; antennal impressions scarcely 

 larger than scape. 



Thorax strongly arched, more coarsely punctate than vertex. Pronotum 

 rather long, depressed below head and dorsiilum but not as much as usual ; 

 proepisternum long, reaching arcuately almostt to suture of dorsulum and 

 mesopleurites. Dorsulum large, about as long as scutum, roundly acute 

 cephalad. Metasternal spurs short. Wings hyaline, relatively quite broad, only 

 a trifle more than twice as long as broad, broadest across middle of fir.st 

 marginal cell, rounded apically but not broadly so ; radius almost straight ; 

 marginal cells subequal ; with four distinctly visible maculae on posterior 

 margin, the largest in first marginal cell, one on margin of cubital and second 

 marginal cells and the fourth at tip of clavus ; venation light brown. 



Male. — Genital segment large, larger than two preceding sclerites : dorsal 

 surface of plate ascending caudad ; claspers long, simple, arcuate and incurved : 

 anal valve about as long as claspers, with a small posterior lobe on each lateral 

 flap ; pubescence sparse. Abdominal tergites short, extending about to third 

 ventral sclerite. Female. — Abdomen much heavier and broader than in male. 

 Genital segment long, almost as long as rest of abdomen, quite acute apically ; 

 dorsal plate slightly longer and less acute than ventral : genital pore fully 

 one-third as long as dorsal plate. 



Described from one male and four females from Colorado; collector C. F. 

 Baker. 



Trioza longistylus Crawf. 

 (Fig. 152. F: 154, E: 155, E) 



Length of body with ovipositor 3.1 mm. ; without ovipositor 2.5 mm. : length 

 of forewing 3.9 mm.; greatest width 1.6 mm.; width of vertex between eyes 

 .48 mm. ; with eyes .90 mm. General color greenish yellow ; body quite large 

 and robust. 



Head strongly deflexed, quite coarsely punctate on vertex and frons, with 

 eyes not as broad as thorax. Posterior margin of vertex narrowly elevated, 

 arcuate ; vertex not raised plate-like ; discal area on each side with an angulate- 

 sulcate depression diverging from posterior marginal ridge toward frons and 

 lower margin of eye ; elevation along median suture quite broad ; anterior 

 margin not deeply emarginate at median suture. Facial cones short, rounded 

 apically, divergent only in distal half, quite vertical, scarcely pubescent. .An- 

 tennae inserted on frons below termination of frontal sulca. 



Thorax strongly arched, more coarsely punctate than vertex. Pronotum 

 quite long, somewhat depressed below head and dorsulum ; with a fovea on 

 each side above episternum. Dorsulum large, rather broadly rounded cephalad. 

 strongly ascending; dorsulum caudad and scutum rugulose. Wings large, 

 hyaline, about two and a half times as long as broad, broadest across first 

 marginal cell, rounded apically but not broadly so; first marginal cell slightly 

 larger than second ; second furcal distinctly arched ; second cubital about 

 twice the length of fourth furcal ; radius about as long as .second cubital ; claval 

 margin very heavy and prominent; venation light brown. 



