Sphecoidea of Nebraska 41 
Diodontus suffusa (Fox). 
1898. Psen suffusa Fox, Trans. Amer. Ent. Soc., XXV, p. 18. 
Females 7: Omaha (4) and Lincoln (3); June 28 to August 
19; visits flowers of Chamaecrista fasciculata and Physalis sp. 
Psen Latreille 
Psen monticola (Packard). 
1867. Mimesa monticola Packard, Proc. Ent. Soc. Phil., VI, p. 407. 
1898. Psen monticola Fox, Trans. Amer. Ent. Soc., XXV, p. II. 
Females 4: Glen (1) and Monroe Canyon (3) ; August. 
Mimesa Shuckard 
KEY TO THE SPECIES 
Females 
meeoomers more or less. reddish). 624. feds ce ees See tees Meee s a oule ks 2 
PM OIE CLEIHE ys lala ts Sk. pers cteseimiore ointe ecemicharete relate raieretne © role Chee 6 
2. Petiole of abdomen as long or longer than the hind femur; posterior 
face OL propoderm smely sculptured! csacee ss scree ess crs 6 sete cressont 
Bevole svonter than ther Mingd-4temiline. scige.c.cs sce ¢o'sies clo ousl« cise ehelerts 3 
3. Posterior face of propodeum finely rugose, not reticulate ..... proxima 
Posterior face of propodeum coarsely sculptured, rugoso-reticulate 4 
4. Mandibles with a strong tooth within near the apex; second segment 
and sometimes base of the third reddish ................ unicincta 
Meni ciblesahotstOObled williinlee aeectreyorterrai ton ert loversianers feria eietah croreeeie 5 
5. Size small, 7 mm.; apex of first segment and second segment reddish, 
pauper 
Size larger, 10 mm.; first, second and third segments reddish, 
nebrascensis 
6. Petiole longer than hind trochanter and femur combined; mesonotum 
MAUL, LONsitudinal® ToOldSsame Rpt nye eyes cicven sicoeccins coms cverolers punctata 
Hetnledot-asiong as the hind femiar © ass.c <5 ca cobs accimds «beac mcs i 
Feerulotneutarsl Mont elOWISIY = ec extenat teaswas od ede lames chalcifrons 
Pyil~tie. tarsi dark, neatly) WiC a). ae ache 2 wasee's sac ake es mandibularis 
Males 
Seoxpgomen more or less redaish: oo aB ness cacy cece Wns ahs ele oa ohn 2 
mmonnienm entirely plac srk cc ae Pais ioe cea soe owas sees 4 
2. Petiole distinctly longer than the hind femur; flagellar joints 2-5 den- 
Cates betiestli teen toyed eastatans ab Aoo aN sla ot, cco ye ey cressont 
Petiole shorter than the hind, Senet gis oii i oci2 endian wecies slaw b's 3 
359 
