Sphecoidea of Nebraska 29 
3. Sternauli wanting; mesepisternum with an oblique suture from below 
FeeNHe tO phepectalmcatita: ek onc krs.s. che clo cotuee pola one Gorytini 
Sternauli present; mesepisternum without an oblique suture from be- 
lows ter tiiaeto apiepectal carina 2..j.c.0.c. occ. cencececeese Hoplisim 
ALYSONINI 
KEY TO THE GENERA 
Submedian cell of anterior wings a little shorter than the median on the 
median nervure; abdomen with a pale spot on each side of the second 
ROCHA UMEISE OMRICHI Ih ate eee roe arte baya oie a cotenize a, axons) acorsivle: tethers Mina SIRO al oka e Alyson 
Submedian cell of anterior wings much longer than the median on the 
median nervure; abdomen without a pale spot on each side of the second 
FUCHS AMRCER TITEL says Se sist Sicko crane aeiel TEM Lia Mathers Rake aero treicnhe Didineis 
Alyson Jurine 
KEY TO THE SPECIES 
1. Median area of propodeum triangular; at least first abdominal segment, 
and usually part of second, in male red, in female black; clypeus 
Ella We lesa eC CIShin sa\saciosteteiensisia ic casatsle sinitelans ols sterere svccete triangulifer 
Median area of propodeum not triangular, usually U-shaped ....... 2 
Sriionix ced: legs except hind tibiae, TE s.r sets nc wow eeinsioa melleus 
“TWOP aR) py 2 Rel katate Parry reg eer ee os Minds Sol eo PTC MPR ras SE peters ede 3 
3. Median area of propodeum coarsely reticulated; two basal segments of 
abdomen red, female; abdomen black, male .............. oppositus 
Median area of propodeum not at all reticulated; abdomen black in 
OPN SERES) Hl Aas eta nro knee eteveauees aid Genes es cioval roe ero arcie eae Soe etee 4 
4. Clypeus entirely yellow; median area of propodeum with numerous 
lonethadiital — radiating: hides ama see vac mixscire a iereiepvictereaterers alae radiatus 
Clypeus yellow, black medially, or entirely black; median area of pro- 
podeum of male with two diverging, central, longitudinal ridges. 
conicus 
Alyson triangulifer Provancher. 
1887. Alyson triangulifer Provancher, Additions a la Faune du Can- 
ada, Hymen., p. 272. 
1894. Alyson triangulifer Fox, Ent. News, V, p. 89. 
Males 4, females 3: Omaha (1), Lincoln (1), West Point (3), 
Broken Bow (1) and Glen (1); June 24 to October 2. 
Alyson melleus Say. 
1837. Alyson melleus Say, Bost. Journ. Nat. Hist., 1, p. 380. 
1859. Alyson melleus Say, Leconte edition, Il, p. 762. 
1894. Alyson melleus Fox, Ent. News, V, p. 87. 
347 
