Sphecoidea of Nebraska 1 he 
2. Mandibles strongly excised beneath; pygidial area of female well de- 
fined, broad and shining; clypeus of male with a fringe of hair on 
ieee STC CUe Heabel ater ante cians cer siant relalatexk ate; a-a. dispels asus seeks Plenoculus 
Mandibles not or very feebly excised beneath; pygidium os female 
i tA HNO Ig £10 fas SHLUEN ITE OO pete ee ot oy oe Sere «os Scala, acescskVa1 Ai etebt (Ni Ste afehai aial ar oiate 3 
3. Hind femora normal, more or less fusiform; pygidial area poorly de- 
fined or lacking; marginal cell usually truneate and appendiculate 
ELEMELITE ME TUTIe Mee eRe Se keat Pe ans bine c'Fiay ror f Seoie aah lak cho, one, eantae Niteliopsis 
Hind femora thickest apically; pygidial area well defined, pilose in both 
sexes; marginal cell lanceolate, not appendiculate...Bothynostethus 
Miscophus Jurine 
Miscophus americanus Fox. 
1890. Miscophus americanus Fox, Ent. News, I, p. 138. 
1891. Miscophus americanus Fox, Ent. News, Il, p. 196. 
1913. ‘Miscophus americanus Williams, Kans. Univ. Sci. Bull., VIII, 
p. 179. 
Females 1: Omaha, August 13, 1914 (L. T. Williams). 
Plenoculus Fox 
KEY TO THE SPECIES 
PU Gimetered: (plackeapiGalliys «sc. ates ead s.0.8 s.0cldieie’ see ee cveuale apicalis 
1) 07 SUE UST a ae ee ee 2 
2. Mandibles reddish medially; hind tibiae and tarsi not at all yellowish, 
propinquus 
Mandibles and hind tibiae and tarsi more or less yellowish ...... davisi 
Plenoculus propinquus Fox. 
1893. Plenoculus propinquus Fox, Proc. Acad. Nat. Sc. Phil., p. 536. 
1899. Plenoculus propinquus Ashmead, Psyche, VIII, p. 338. 
Females 2: Mitchell, June 27, 1913 (L. M. Gates), and Glen, 
August 20, 1906 (H. S. Smith). 
Plenoculus davisi Fox. 
1893. Plenoculus davisti Fox, Psyche, VI, p. 544. 
1893. Plenoculus davisii Fox, Proc. Acad. Nat. Sc. Phil., p. 536. 
1913. Plenoculus davisi Williams, Kans. Univ. Sc. Bull., VIII, p. 175. 
Females 6: Omaha (4) and West Point (2); June to August 
20; visits flowers of Chamaecrista fasciculata. 
431 
