Pomona College Journal of Ento.moujcv 4J5 



DD. Facial cones not very short, at least moderately acute apically. 

 Female genital segment not cxtreiiK-ly long and acute. I'ronotum 

 usually rather short. 

 LC. Wings very broadly rounded apically, without any angulation what- 

 ever (V. longicornis is typical of a rounded wing; 7". similis and 

 T. albi/rons 1 consider slightly angulated) ; furcation of second 

 cubital on or behind long axis of wing from base of subcosta to 

 apex of wing. Facial cones long, divergent. 

 F. Thorax and verte.\ quite conspicuously striped and banded with 

 yellowish white on dark ground color. T. varians Crawf. 



FF. Thorax and vertex not striped or banded. 

 G. Facial cones quite horizontal, easily visible from above. Radius 

 short, straight ; fourth furcal one-half as long as second cubital. 



T. rot\tndil<cnnis Crawf. 

 GG. Facial cones subvertical, only slightly visible from above. Radius 

 long, curved ; fourth furcal less than one-third as long as seconil 

 cubital. T. longicornis Crawf. 



EH. \\ ings not very broadly rounded, as above ; more or less angiilated 

 or acute apically ; furcation of second cubital usually in front of the 

 long a.xis of wing. Facial cones not very long. 

 F. Length of forewing ilistinctly less than 3 mm. Body very sTuall. 

 Facial cones short, subacute. 

 G. Genital segment of female long, with a short, slender ovipositor 

 sheath. Labrum small. I'nepimeron mostly concealed, visibly 

 only half as long as episternum ; forecoxa: mostly visible. 



T. nicaragucnsis Crawf. 



GG. Genital segment of female very short ; dorsal plate very obtuse. 



Labrum relatively large. I'nepimeron visibly as long as or 



longer than episternum ; forecoxae mostly concealed. 



H. Facial cones straight and ((uite parallel on inner margin, scarcely 



tlivergent. '/'. minuta Crawf. 



HH. Facial cones not entirely straight, somewhat divergent, liody 



slightly larger. 7". minula similis Crawf. 



FF. Length of forewing fully 3 nun. or more. I'ody not unusually 



small. 



G. Radius short, straight, without a curve : subcosta nearly or fully 



as long as margin of radial cell. 



11. Hind margin of wing with four spots visible to unaided eye. 



one on margin of each marginal cell, one on cubital cell, and 



one on anal angle. Vertex glabrous. Prcepimeron mostly visible. 



T. quadripuiiclata Crawf. 

 HH. Hind margin without four easily visible spots; three usual 

 marginal spots present. X'ertex slightly pubescent. Pnrpi- 

 meron mostiv concealed. 



