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Sphecidae 1013 



SUBFAMILY PSENINAE 



Tribe PSENINI 



DiODONTUS Curtis not auctt. 



(Neofoxia Viereck) 



(Subgenus PSENULUS Kohl) 



D. trisulcus (Fox). Otto, bred from nests in sumac stems, adults emerging May 18, 

 Comstock (Bdy-CU). 



PSEN Latreille 

 (Subgenus PSEN Latreille) 

 P. monticola (Pck.). Ithaca, Jl 18, 1922 (Bdy-CU), Jl 7 (Bks). 



(Subgenus MiMESA Shuckard) 



P. argentifrons (Cress.). Ithaca, Aug 18 (Bdy-CU); Gloversville, Sep (NYS). 



Nests in sandy places, and Williams has observed a cone of agglutinized sand 



grains surmounting the entrance ; the nests are provisioned with leaf hoppers, 



Williams states of the species Athysanus exitiosa Uhler. 

 P. borealis (Sm). Enfield Falls, Sep 10 (Bdy-CU). 

 P. cressoni (Pck.). Niverville, Aug 24 (Bks). 

 P. denticulata (Pck.). "NY", Nort (Pck). 

 P. johnsoni (Vier.). Dryden L., Je 16, MacG (Bdy-CU). 

 P. kohlii Fox. LI: Gardiners I. (Beq). 

 P. leucopus Say. Ithaca, Jl 16- Aug 9 (Bdy-CU). 

 P. longicornis Fox. Ithaca, Jl 16 (Bdy-CU). 

 P. mellipes Say. "NY" (Fox). 

 P. niger Pck. Axton, Je 12-22, MSrH (Ashmead-CU) ; Norton's Landing, Cayuga 



L., Je 13, SmHH (Cress-CU) ; LI: Long Beach (Beq). 

 P. pauper (Pck.). Albion (Bdy-CU) ; Hamburg, Jl 19, MCV (Bks) ; Ithaca, Aug 



23 (Bdy-CU); LI: Fishers I., Aug, Zab (AM). 

 P. trisulcus Fox. LI: Sea Cliff, Sep (Bks). 

 P. unicincta (Cress.). Ithaca, Jl 5 (Bdy-CU). 



Tribe PEMPHREDONINI 

 Stigmus Panzer 



(The members of this genus build in wood, tw^o or three wasps building, in some 

 cases at least, chambers near together, which have a common entrance gallery. 

 They provision their nests with aphids.) 



S. americanus Pck. Ithaca (Bks); McLean, Sep 16, 1924, Sib (Bdy-CU). 



S. fraternus Say. L. Placid, Je, Yg (NYS) ; Silver Bay, Je, Yg (NYS) ; Elm L, 

 Aug, Yg (NYS); Norton's Landing, Cayuga L., Je 4, SmHH (Cress-CU) 

 Ithaca, Jl, nest in pithy stem, adults emerged Jl 22 (CU) ; McLean, Sep 16 

 1924 (Bdy-CU) ; Albany, Aug, Yg (NYS) ; Rensselaer, Je, Yg (NYS) 

 W. Nyack (Beq) ; Dobbs Ferry, Jl, Yg (NYS) ; West Farms, Angus (Pck) 

 LI: Gardiners I. (Beq); Sea Cliff, Je, Roslyn (Bks). 



