AMERICAN TRIOZIN/E 1 233 



F. Wings with four large Islack spots on dorsal margin 

 easily visilile to naked eye, one on margin of each 

 marginal cell, one on margin of cubital cell and 

 and one on anal angle. Facial cones medium, mod- 

 erately divergent Trioca qnadripunctata n. sp. 



FF. Wings without four spots easily visible to unaided 

 eye. 



G. Female with long exserted ovipositor blade. 

 H. Prothora.x large, only slightly depressed 

 below anterior margin of mesonotum. 

 Ovipositor style nearly twice as long as 

 terminal abdominal segment, and very 

 slender and acute. Body and wings large. 



Trioca longistylus n. sp. 



HH. Prothorax not large, much depressed be- 

 low mesonotum. Style not longer than 

 terminal segment. Body and wings small. 



_ Trioza nicaragucnsis n. sp 



GG. Female without exserted style. 



H. Frontal plates with a long oblique groove. 



I. Facial cones slender, acute and strong- 



ly divergent Trioza sulcata n. sp. 



II. Facial cones rather acute and only 



slightly divergent. 



Trioza sulcata siinilis n. var. 



HH. Frontal plates without oblique furrow. 



I. Anterior ocellus in median notch of 



frontal plates and slightly visible from 

 above. Frontal plates with fovea pos- 

 teriorly Trioza fovcalis n. sp. 



II. Anterior ocellus under projecting 



frontal plates and not visible from 

 above. Frontal plates scarcely de- 

 pressed Trioza assimilis n. sp. 



CC. Facial cones contiguous for entire length and very acute. Body 

 very slender; head fully as broad as thorax. 

 D. Third furcal longer than margin of cubital cell. Frontal 



plates black in center, bordered with yellow; cones long, 



slender, yellow, except black at tips. 



Trioza inimaculata n. sp. 



DD. Third furcal and cubital margin about equal. Frontal plates 

 entirely black ; cones medium in length. 

 Trioza laticcps n. sp. 



