142 A. B. GAHAN Vol. XXII, No. 5 



broad; first abscissa of radius not half as long as the width of stigma, 

 the second abscissa long and curved, not reaching to the wing apex; 

 metacarpus a little longer than the anterior margin of stigma; basal 

 half of first abscissa of cubitus effaced, the first cubital and first dis- 

 coidal cells incompletely confluent; cubital vein beyond the inter- 

 cubitus obsolescent; nervulus postfurcal by nearly its own length; 

 first brachial cell narrowly open at its posterior outer angle; abdomen 

 subequal to the thorax in length, curved downward at apex; first 

 tergite increasing gradually in width from base to apex, longitudinally 

 striate, about twice as broad at apex as at base and a little more than 

 one and one-half times as long as broad at apex; second and following 

 tergites perfectly smooth, the second large and occupying most of the 

 dorsal length of abdomen, tergites beyond the second bent downward; 

 ovipositor curved sharply downward and forward, the ovipositor 

 sheaths broad, narrowed at base and apex and a little shorter than the 

 length of first tergite, 



Black; five or six basal joints of antennae, mandibles, clypeus, palpi, 

 and all legs including their coxae pale reddish testaceous; face, pro- 

 thorax and the mesopleura more or less reddish brown to piceous ; tarsal 

 claws, and antennas except base of latter dark brown; wings hyaline, 

 stigma and veins dark brown except medius and submedius which 

 are pale; ovipositor testaceous, its sheaths black. 



Male unknown. 



Type locality. — Marietta, Ohio. 



Type.— Cat. No. 25064, U. S. N. M. 



Host. — Diahrotica vittata (Fabricius). 



Type and three paratype females received from W. V. 

 Balduf, of the Ohio Agricultural Experiment Station, by whom 

 they were reared June 29 and July 2, 1921, from adults of the 

 cucumber beetle. 



