OF WASHINGTON, VOLUME XVII, 1915 137 



GENUS OMORGUS Foerster. 



The following table includes those species of the genus the 

 types of which are in the National Museum, and shows the 

 affinities of the two new species described below. 



Table of Species. 



1 . Posterior orbits sloping roundly inward behind the eyes . . . 

 Posterior orbit straight and broad (j 



2. Hind tibiae white at base and in the middle with a black annulus near 



the base and another at the tip, the two connected below by a reddish 

 stripe; hind basitarsus white at base, front and middle coxae mostly 



reddish phthorimaece n. sp. 



Hind tibia? reddish, sometimes infuscated near base and at apex. ... 3 



3. All coxa? red; scape beneath not pale; nervellus curved outward and 



not broken; fovea of second tergite much nearer to base than to 



spiracle fcrrugineipes Ashm. 



Some or all of the coxae black; fovea of second tergite but little nearer 

 to base than to spiracle 4 



4. Front and middle coxa? red, hind pair black; abdomen largely red, 



the first and second tergites tipped with red polychruxitlix Vier. 



All coxae black; abdomen normally entirely black but sometimes red- 

 dish laterally toward apex, the first and second tergites always 

 black 5 



5. First tergite with a punctiform median impression somewhat in front 



of the spiracles, the segment in side view swelling rather abruptly 

 from this point backward; ovipositor three-fifths as long as abdomen; 

 hind trochanters black; wing veins fuscous; nervellus broken some 



distance above anal vein lurlrir/t/ix n. sp. 



First tergite without a median dorsal impression and gradually swollen 

 apically; ovipositor half as long as abdomen; hind trochanters red; 

 wing veins rufous; nervellus not broken, the trace of the subdiscoidal 

 vein interstitial nolce Ashm. 



6. Hind and middle femora infuscated; scape not pale beneath; ovipositor 



three-fifths as long as abdomen; nervellus broken well above anal 



vein ; large species, 8 mm epinotice Vier. 



Hind and middle femora red; scape pale hcnath; ovipositor half as 

 abdomen; nervellus straight subdiscoidal vein absent; small species, 

 4 mm iiii/ricincta Ashm. 



Omorgus tortricidis n. sp. 



Very closely allied to nolce Ashm., but easily distinguished from that 

 species by the characters given in the table to species. 



Female. Length 5.5 mm.; ovipositor L' mm. Head opaque granular 

 and clothed with white pubescence; ciypciis slightly elevated and with a 

 shallow median impression, sparsely punctate; malar two-thirds as long 



