412 NEW SPECIES OF HYMENOPTERA 



Type, a female collected at Imperial, Nebraska, July 2, 1911, 

 (J. T. Zimmer). 



A very distinct species in the peculiar clypeal projection, in 

 the shape of the propodeal stripes, which are produced inwardly 

 to form sort of a hook, and in being profusely marked with yellow. 



Cerceris argia sp. nov. 



? . Length 9 to 10 mm. Black; base of mandibles, clypeal projection 

 above except the tip, spot at base of interantennal carina, large spot each side 

 of the face, scape beneath, spot behind the summit of the eyes, two spots on 

 pronotum, spot behind the posterior lobes of the pronotum, tegnlae, two spots 

 on mesoscutellum, metanotum and rather wide bands much narrowed medially 

 on abdominal tergites two to five, all yellow; propodeum except enclosure, and 

 first segment of abdomen red; venter except first and basal part of second 

 abdominal sternites, black; anterior legs black, except the tips of femora, tibiae 

 and tarsi yellowish; intermediate and posterior legs largely fulvous; flagellum 

 fulvous beneath, black above; body very moderately and not closely punctate 

 (not nearly so coarsely and closely punctured as in rufinoda); clypeal projec- 

 tion about as long as it is broad at the base, narrowed at the tip, concave be- 

 neath the tip (much the same shape as in irene) ; episterna with a spine before 

 the intermediate coxae; enclosure of propodeum transversely rugose, channelled 

 medially; pygidial area about twice as long as broad, narrowed at the base, 

 narrowed and rounded at the tip. Wings subhyaline, slightly darker at the 

 tips, stigma blackish. 



cf. Unlcnown. 



Type, a female collected at Lincoln, Nebraska, August 5, 

 1904, on Solidago sp., (M. H. Swenk). 



Related to the following species, but distinct from that in 

 having a different clypeal projection, in the different punctura- 

 tion of the body, and in having a differently shaped pygidial area. 



Cerceris echo sp. nov. 



1908. Cerceris rufinoda crucis H. S. Smith, Univ. Nebr. Studies, viii, p. 370, 

 (in part), (nee Viereck and Cockerell). 



9 . Length 7 tb 10 mm. Black; base of mandibles, large spot on each side 

 of the face, small spot behind the summit of the eyes, two spots on the pro- 

 notum, tegulae, two spots on the mesoscutellum, metanotum, broad band on 

 second abdominal tergite, narrower bands on tergites three to five, all yellow; 

 propodeum except enclosure, and first abdominal segment, red; venter except 

 first and basal part of second abdominal sternites, black; all the coxae and tro- 

 chanters blackish, anterior and intermediate femora blackish with the apical 

 third reddish yellow; posterior fcHiiora reddish, blackish at the base, all the 

 tibiae and tarsi yellowish; flagelhun fulvous beneath, black above. Body 

 moderately and quite closely punctate; clypeus swollen so as to form a raised, 

 glabrous ridge above the apex, this ridge is slightly raised at the sides so as to 



