452 Pomona College Journal of Entomology 



genital pore about one-fifth as long as dorsal plate; ventral plate quite linear 

 and very acute distally ; pubescence sparse. 



Described from one female collected by G. R. Pilate in T.ouisiana. 



Epitrioza n. gen. 



Head small, scarcely deflexed ; vertex more or less excised ; facial cones 

 almost obsolete, reduced to globose lobes scarcely visible from the side. An- 

 tennae inserted on frons and base of facial cones laterad; labrum easily visible 

 from in front below facial cones. 



Thorax not strongly arched, broader than head including eyes ; pronotum 

 rather short, distinctly arched and scarcely depressed below head and dor- 

 sulum; prcepimeron only slightly visible; propleurites set rather obliquely; fore- 

 co.xse almost entirely visible in front of the mesepisternum. Wing venation 

 quite similar to typical Triodnae; first cubital scarcely more than twice the 

 length of first furcal. 



Type of genus : Epitrioza mcdicaginis Crawf. 



Synopsis of the Genus Epitrioza 



A. Body very small ; wings small, less than 2.5 mm. in length, slightly 

 coriaceous. Vertex raised somewhat plate-like, bulging over insertion 

 of antennae. Pronotum quite long. Forecoxae short. Genital segment 

 of female scarcely longer than dorso-ventral width. 



E. medicaginis Crawf. 



AA. Body normally large. Wings normal, more than 3 mm. in length, hyaline. 

 Vertex not raised plate-like, not bulging over insertion of antennae. 

 Pronotum quite short. Forecoxae long. Female genital segment about 

 twice as long as basal dorso-ventral width. £. oaxaccnsis Crawf. 



Epitrioza medicaginis (Crawf.) 



{Parairioza medicaginis Crawf.) 



(Fig. 152, O, R; 153, P; 154, N; 155, N) 



Length of body 1.7 mm.; length of forewing 2.6 mm.; greatest width 1.0 

 mm. ; width of vertex between eyes .43 mm. ; with eyes .68 mm. General color 

 yellowish green throughout. Body small, slender. 



Head scarcely deflexed, small, with eyes not quite as broad as thorax, some- 

 what punctate. Posterior margin of vertex arcuate, slightly elevated nar- 

 rowly; vertex raised somewhat plate-like; discal area with a distinct fovea 

 on each side of median suture, near posterior margin and an oblique depression 

 extending forward and toward eyes ; anterior margin moderately cmarginate 

 at median suture above anterior ocellus. Facial cones reduced to two rather 

 large globose lobes extending vertically downward, scarcely visible from side, 

 slightly pubescent ; antennal insertions prominent, occupying large area laterad. 

 Labrum large, prominent below facial cones from in front. 



Thorax small, not strongly arched, quite coarsely punctate; pronotum short, 

 arched, not depressed below head and dorsulum ; sides quite parallel ; pro- 

 pleurites obliquely set ; proepimeron small ; forecoxae small, almost entirely 



