230 POMONA COLLEGE JOURNAL OF ENTOMOLOGY 



BB. Wings pointed apically. Prothorax broader than usual. 



C. Radius shorter than second cubital. Discal area of vertex with 

 a deep fovea on each side of median suture posteriorly ; pro- 

 notum with a distinct pit on each side ; facial cones subhorizontal. 

 Wings more or less clouded or blotched. 



D. First marginal cell much larger than second ; fourth furcal 

 less than one-fourth as long as second cubital. With a large 

 macula covering second marginal cell and part of cubital 

 cell. Wing not acutely pointed at tip. 



Trioca iiiaciilata n. sp. 



DD. Marginal cells subequal ; fourth furcal fully one-third as 

 long as second cubital ; wings somewhat clouded, but without 

 distinct maculae or spots ; wings acutely pointed at tip. 



Trioca acutipciuiis n. sp. 



CC. Radius very much longer than second cubital. Pronotum with- 

 out pits ; discal pits less pronounced. Facial cones horizontal. 



Wings not clouded Trioca bakcri n. sp. 



A.'\. Pronotum depressed ; mcsonotum roimdly pointed anteriorly and more ele- 

 vated than pronotum. 



B. Facial cones not vertical, distinctly visible from above. 

 C. Radius distinctly shorter than second cubital. 



D. Wings with dark maculae and bands ; body dark with lighter 

 areas. Facial cones rather small and subacute. 



Trioza inaciilipeniiis, n. sp. 



DD. Wings clear, not blotched. 



E. Facial cones short, stout and very blunt at tip. Second 

 marginal cell extremely large ; fourth furcal nearly as 

 long as second cubital ; wings very large and acutely 



pointed - Trioza hitipcnnis n. sp. 



EE. Facial cones normal ; second marginal cell not unusually 

 large. 



F. Body small, greenish yellow throughout. Frontal 

 plates depressed longitudinally in center, elevated 

 along median suture ; facial cones not acute. Radius 

 very short, not longer than basal and discoidal por- 

 tions of subcosta combined Trioza viridis n. sp. 



FF. Jjody medium, orange colored. Frontal plates de- 

 pressed obliquely ; facial cones acute. Radius al- 

 most as long as second cubital. 



Trioza frontalis n. sp. 



CC. Radius as lung as, or longer than second cubital. 



D. Wings more or less pointed apically. Frons and facial cones 

 black ; discal area of vertex quite deeply depressed. 

 Trioza nigrifrons n. sp. 



