Pomona College Journal of Entomology 429 



GG. Set?e less prominent ; win^s less fulvous ; punctural dots not con- 

 spicuous. Body smaller. T. mcxicana miniita Cravvf. 

 FP". Veins of wing without set;e, or if present scarcely visible. Anal 

 valve of male ovoid, extending caudad. Claspers slender, curved, 

 acute apically. 7'. assiniilis Crawf. 

 DU. Genital segment of female distinctly longer than dorso-ventral width. 

 Anal valve more or less spatulate. 

 E. Both cubital veins and radius bordered with bruwn or black band. 

 Anal valve large, with a large posterior lobe. 



T. tripuiictata (Fitch) Riley. 

 EE. Cubitals and radius witlKuit dark bands. Anal valve without large 

 posterior lobe. 

 F. Anal valve very large, spatulate, both margins subequal in length ; 

 with a bifurcate ridge extending from base toward each dorsal 

 corner. 

 G. Body brownish red to orange. Thorax quite strongly arched. 

 Notum finely and inconspicuously pubescent. 



T. frontalis Crawf. 

 GG. Body dark reddish brown. Thorax less strongly arched. Notal 

 pubescence slightly more conspicuous. 



T. frontalis snlcata Crawf. 

 FF. Anal valve not imusually large, subspatulate ; posterior margin 

 much shorter than anterior ; bifurcate ridge wanting. 

 G. Forewing with four spots on hind margin visible to unaided eye, 

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

 and one on anal angle. Vertex orange to brown. Margins of 

 anal valve arcuate. T. quadripunctata Crawf. 



GG. Forewing without four visible spots ; three usual spots present. 

 Vertex and facial cones whitish. Margins of anal valve quite 

 straight. T. albifrons Crawf. 



BB. Female with a long, slender, acute ovipositor sheath ; with basal portion 

 of genital segment large, subspherical ; genital segment very long. 

 Facial cones quite short. 

 C. Produced ovipositor sheath not longer than enlarged basal portion of 

 genital segment. 

 D. Produced sheath very short ; body very small. Wing less than 2.5 

 mm. in length. Facial cones subacute. T. nicaraguensis Crawf. 

 DD. Produced sheath about as large as enlarged portion. Body nor- 

 mally large. Wing more than 3.3 mm. in length. Facial cones 

 rounded. T. collaris Crawf. 



CC. Produced ovipositor sheath much longer than basal portion of genital 

 segment. Facial cones very short and rounded. 

 D. Genital segment less than one-fourth the length of rest of body. 

 Proepimeron visibly as long as episternum. T. longistylus Crawf. 

 DD. Genital segment fully one-fourth as long as remainder of body. 

 Epimeron mostly concealed, visibly shorter than episternum. 



T. proxiinata Crawf. 



