PROC. ENT. SOC. WASH., VOL. 22, NO. 4, APRIL, IQ2O 79 



below, densely pitted; elevated above level of orbits; clypeus barely half 

 as long as wide, divided transversely by a sharp carina, truncate at apex, 

 mostly smooth, separated from face by a deep groove which extends laterally 

 and dorsally to the eye margin; sides of frons sculptured like the face; head 

 otherwise polished. Thorax polished; scutellum with a few transverse welts 

 rather than rugose; post-scutellum with a transverse carina; propodeum with 

 the apical carina and the median carinae beyond the basal missing, basal 

 median area concave, wider than long, rounded behind; spiracles slit-like, 

 curved, ditected backward ; metapleurum with a distinct triangular tooth 

 just in front of middle coxa; hind coxa with a prominent flange-like projec- 

 tion below at base; areolet narrowly sessile, quadrangular, the second inter- 

 cubitus forming its longest side; discoidella originating from cubite'lla nearly 

 midway between nervellus and intercubitella. Abdomen with basal seg- 

 ments polished; apical segments with dense, short, appressed pubescence; 

 first tergite more than three times as long as wide at apex, the spiracles 

 slightly beyond the middle; second tergite shorter than third, hardly twice 

 as long as wide, its sides parallel; third slightly more than twice as long as 

 wide; third to fifth slightly emarginate at apex; sixth not at all emarginate; 



--sh 



Fig. 1. Apex of abdomen of Rhyssa and Apechoneura. a -Lateral view 

 of Rhyssa persuasoria (Linne). b -Dorsal view of same, c Lateral view of 

 Apechoneura longicanda Kriechbaumer. d Dorsal view of same, e Dorsal 

 view of Apechoneura tricolor Cushman. ?T-ioT = Seventh to tenth tergites; 

 05 = ninth sternite; c = cerci; o = ovipositor ; 5^ = sheath of ovipositor; sp = 

 spiracle; st = fused suture between ninth and tenth tergites. 



