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U. S. NATIONAL MUSEUM BULLETIN 216 



Figure 103. — Locality for 



Piogaster maculata. 



of propleurum, anterolateral margin of mesoscutum, and stain on 

 metapleurum dull ferruginous; legs whitish grey with irregular dark- 

 brown spots, the spots lined up in two longitudinal stripes on upper 

 side of femora and one longitudinal stripe on upper side of tibiae, the 

 tarsi dark brown, paler beneath; costa and front margin of stigma 

 whitish, rest of veins and stigma pale brown; abdomen blackish 

 brown. 



Type: 9, swept from shoulder-high branches of a conifer at edge 

 of mountain meadow, Crane Flat, Yosemite Park, Calif., July 25, 1948, 

 H., M., G., D., and J. Townes (Washington, USNM 63703). 



7. Genus Oxyrrhexis 



Figure 295,b 



Oxyrrhexis Foerster, 1868, Verh. Naturh. Ver. Rheinlande, vol. 25, p. 166. 

 Type: Cry plus carbonator Gravenhorst; included by Schmiedeknecht, 1888. 



Differs from Polysphincta in slightly stouter build, abdominal 

 tergites rather densely, coarsely, punctate, and the ovipositor shorter 

 (its sheath about 1.4 to 1.8 as long as the apical depth of the abdomen). 



It is questionable whether this genus should be maintained as 

 distinct from Polysphincta. It contains the Holarctic 0. carbonator 

 and the Japanese {Polysphincta) Oxyrrhexis tuberculata Uchida, 1932 

 (new combination). 



1. Oxyrrhexis carbonator (Gravenhorst) 



Figure 332,h 



Front wing of male 3.7 to 5.5 mm. long, of female 5.2 to 7.6 mm. 

 long; median part of apical margin of clypeus subtruncate; punctures 

 on propodeum moderately dense; paired swellings on third and fourth 

 tergites a little transverse; ovipositor sheath about 1.4 as long as 

 apical depth of abdomen. 



