434 NEW SPECIES OF HYMENOPTERA 



punctured abdomen, the sculpture of the propodeum and the 

 form of the metanotal spine. 



Oxybelus major sp. nov. 



cf. Length 12.5 mm. Clypeus strongly tridentate; head with very strong, 

 well separated punctures, those on the front much finer than those on the 

 vertex; distance between the two posterior ocelli about twice the distance be- 

 tween one of them and the nearest eye-margin; first joint of the flagellum dis- 

 tinctly longer than the second; clypeus and front with long, rather thick, 

 silvery pubescence; remainder of head with short, sparse, silvery pubescence; 

 pronotum not carinate its entire width, striato-punctate laterally; posterior 

 lobes of the pronotum carinate anteriorly, appearing dentate; mesoscutum 

 with large deep punctures, a longitudinal, median line anteriorly, and a dis- 

 tinct, linear fovea laterally near the tegulae; mesoscutellum and metanotimi 

 punctured like the mesoscutum, with a distinct, longitudinal, median carina; 

 episterna strongly punctate above, the punctures distinctly smaller toward 

 the posterior margin; episterna below coarsely, longitudinally rugoso-punctate; 

 episterna on the lower anterior margin and at the point of juncture with the 

 mesosternum, produced so as to form a very prominent ridge; very strongly 

 ridged before the intermediate coxae; lateral points of squamae rather short, 

 rounded, not sharp; spine narrow, deeply channelled (tip of spine broken off, 

 but evidently acute) ; upper surface of propodeum coarsely striato-punctate, 

 the striae becoming finer and closer towards the lateral margins; median area 

 of posterior face small, ahnond-shaped, deep, rugose within; remainder of 

 posterior face coarsely, transversely striato-punctate; sides of propodeum 

 strongly, transversely striate; abdomen with coarse, well separated punctures, 

 without any indication of lateral spines; first abdominal tergite with a longi- 

 tudinal, median depression; last tergite widely emarginate apically. Color, 

 black; small lateral spots on pronotum, posterior lobes of pronotum, narrow 

 line from postero-lateral angle of mesoscutellum to base of anterior wings, 

 line from metanotum to base of posterior wings, bands on the apical portion 

 of abdominal tergites one to four, wide at the sides, dilated and widely inter- 

 rupted medially, large spot on anterior and intermediate femora at the tips 

 outwardly, hne on all the tibiae outwardly, not reaching to the tips, all very 

 pale yellowish; flagellum black; anterior tibiae dark ferruginous within; tegulae 

 testaceous; wings tinged with yellowish, nervures and stigma light brown. 



9 . Unknown. 



Type, a male collected at South Bend, Nebraska, July 14, 

 1915, on Melilotus alba, (E. M. Partridge). 



Related to albosignatus, but differs from that species in the 

 much larger size, the structure of the lower half of the episterna, 

 the sculpture of the posterior face of the propodeum and the 

 yellowish tinge to the wings. 



