116 Clarence E. Mickel 
Seventh ventral segment flat, not carinated .................+200- 10 
10. Tibiae- entinely:syellowe oy aw. seca ee eee nee eeeiereies nanus 
Tibiae- black andGyellowi tasers ee ae oie ne shee strenuus 
It; Second cubital-cellidistincthy. petiolate :....sne. sce t eset eee flavus 
Second cubitalcell: not petiolatescccs a eeenie eee eee aie xanthochrous 
12. First and second transverse cubital nervures widely separated above; 
sizelatee, OVEr! 23 emis seis vere ocahe cr elonersmraeteys ee orrorsiake eters brevipennis 
First and second transverse cubital nervures narrowly separated above 
OF umMecting size smaller Ms—TOmmitniits sect epee mers unicinctus 
Stizus godmani Cameron. 
1890. Stizus godmani Cameron, Biol. Centr. Amer. Hym., p. 102, pl. 
Ve 8: 
1895. Stisus godmani Fox, Proc. Acad. Nat. Sc. Phil., p. 267. ° 
Males 6, females 13: Bridgeport (2), Mitchell (17) ; July 11 
to September 6. 
Stizus nanus Handlirsch. 
1892. Stisus nanus Handlirsch, Sitzb, Akad. Wissensch., Wien, LI, 
Bd., Abth., I, p. 61. 
1895. Stizsus nanus Fox, Proc. Acad. Nat. Sc. Phil., p. 267. 
Males 1, females 1: West Point (1) and Carns (1); July; 
visits flowers of Euphorbia sp. 
Stizus strenuus Mickel. 
1918. Stisus strenuus Mickel, Univ. Nepr. Stupres, XVII, p. 331. 
Males 3, females 2: Bridgeport (5); July 11, 1917 (C. E. 
Mickel). 
Stizus flavus Cameron. 
1890. Stisus flavus Cameron, Biol. Centr. Amer. Hym., p. 103, pl. V, 
fig. 9. 
1895. Stizus flavus Fox, Proc. Acad. Nat. Sc. Phil., p. 268. 
Males 12: Bridgeport (1) and Mitchell (11) ; July 11 to Sep- 
tember 6; visits flowers of Melilotus alba. 
Stizus xanthochrous Handlirsch. 
1892. Stizus sxanthochrous Handlirsch, Sitzb. Akad. Wissensch., 
Wien, LI, Bd., Abth., I, p. 60, pl. I, figs. 9, 10. 
1895. Stizsus xanthochrous Fox, Proc. Acad. Nat. Sc. Phil., p. 268. 
Males 12: Omaha (12); June 24 to July 14; visits flowers of 
Chamaecrista fasciculata. 
434 : 
