﻿AMERICAN TRIOZIN/E I 233 



F. Wings with four large black spots on dorsal margin 

 easily visible 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 Trioaa quadripunctata n. sp. 



FF. Wings without four spots easily visible to unaided 

 eye. 



G. Female with long exserted ovipositor blade. 

 H. Prothorax 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. 



Trioaa longistylus n. sp. 



HH. Prothorax not large, much depressed be- 

 low mesonotum. Style not longer than 

 terminal segment. Body and wings small. 



_ Triosa nicaraguensis 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. 



Trio::a sulcata siinilis n. var. 



HH. Frontal plates without oblic|ue furrow. 



I. Anterior ocellus in median notch of 



frontal plates and slightly visible from 

 above. Frontal plates with fovea pos- 

 teriorly Trioza foz'calis n. sp. 



II. Anterior ocellus under projecting 



frontal plates and not visible from 

 above. Frontal plates scarcely de- 

 pressed Triorja 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, e.xcept black at tips. 



Trioza iniinaculata n. sp. 



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



entirely black ; cones medium in length. 



Triorja laticcps n. sp. 



