No. 232G. 



THREE TRIBES OF ICHNEUMONINAE—CUSHMAN. 39 



strongly oblique at apex, pedicel about as long as scape, basal joint 

 of flagellum nearly twice as long as second, those beyond middle as 

 broad as long; thorax rather short, high anteriorly; notauli short and 

 parallel, deep anteriorly with a ridge running back along the margin 

 of the lateral lobe; prepectus broad, the carina turning sharply 

 toward the promesothoracic suture about half way up the pleura; 

 mesopleural suture angulate opposite the punctiform fovea; 

 scutellum strongly convex, margined only at base; propodeum with 

 at least a very strong apical carina, spiracle long and slit-like, the 

 surrounding carina high; wings large, stigma narrow lanceolate, 

 radius before middle, areolet broadly sessile, nervellus strongly 

 reclivous and broken far above the middle; legs, especially posterior 

 femora, stout, last tarsal joint in hind legs as long as first; abdomen 

 fusiform, rather narrow at base; first tergite longer than broad and 

 longer than second, others transverse, apical tergite short; ovipositor 

 shorter than abdomen, subcylindrical, the lance nearly straight dor- 

 sally to apex; hypopygidium retracted. 



Generic characters. — The three genera are separable by the 

 structural and color characters used in the following key to genera. 

 These are the only characters of any importance that have i)een dis- 

 covered; and of these only two, the propodeal carinae and the infuma- 

 tion of the wing apices, are without exceptions within one or another 

 of the genera as represented in the material exammed. Krieger's 

 very long and minute description of Neotheronia ^ applies almost 

 equally as well, with these two exceptions, to Theronia. Even these 

 two characters are more or less comparative, for some specimens of 

 Neotheronia have the propodeum flattened medially with obsolete 

 ridges in the normal positions of the carinae, and the infumation of 

 the wings in that genus varies in intensity, sometimes almost to 

 absence. 



KEY TO GENERA. 



1. Propodeum before apical carina di\ided into five areas, the lateral carina some- 



times weak; prepectal carina only weakly curved at sternauli, not subangulate 

 where it turns toward the promesothoracic suture, the sternauli weak; wings 

 immaculate, stigma and costa usually red; face more or less elevated in middle, 

 without longitudinal furrows; clypeua usually convex basally and impressed 



at apex Theronia Holmgren. 



Propodeum with longitudinal carinae wanting before apical carina; wings more or 

 less infumate at apex, costa blackish, stigma usually so; face usually flat with 

 two more or less distinct longitudinal furrows; clypeus flat, broadly rounded 

 at apex and with a reflexed margin 2. 



2. Prepectal carina as in Theronia; first tergite nearly parallel-sided, about four times 



as long as wide at apex, dorsal carinae obsolete; wings yellow with brilliant 

 gold reflections, stigma except costal margin red; face slightly elevated medially 

 and with very weak furrows Epimecoideus Ashmead . 



1 Krieger, R., Zeitschr. Uym. Dip., vol. 5, 189.5, p. 3S9. 



