The Sphegoidea of Nebraska 17 
Type, a female taken at Glen, Sioux county, Nebraska, altitude 
4,000 ft., August 21, 1906 (H. S. Smith). One paratype, same 
locality and date as type (P. R. Jones). Related to bellus, yet 
very distinct from. that species. 
Genus Nysson Latreille 
SYNOPSIS OF THE SPECIES 
MER ie ce Fee Neha aioe ayesig cha he yal Mie wcbeth «din Paid big Siw @aye aieees 1 
re EO Pet eer att SN nd wicuaiah citi alas OO alah wae Sa) okie wees 4 
1. Basal segment of abdomen red; size small, 5-6 mm. long...rufiventris 
MOMENTO abeallused's ccc. c cts Site aes asibsaeraiaiy iets sie sitys dade le ee)sieteicnen 2 
2. Scutellum faintly margined laterally, covered with large 
sparse, shallow punctures; spots on the first abdominal 
Beeiient Pie latGest. fe oclacktii,e abc» leet widne tt oe eue'e de wie s 3 
2. Scutellum not margined laterally, but strongly and closely 
punctured; puncturation of head and mesonotum very 
close; spots on first abdominal segment same size as those 
GUS LE MAIS! SESTMIETILS + 5 y- ya ehatelc\sietels) sbellelate) s?atsicgels'c ateiebelellp sie fidelis 
3. Pygidial area broad, subtruncate at tip, with large somewhat con- 
‘fluent punctures; spots on first abdominal segment almost 
covering the entire segment; size large, 11-13 mm... .plagiatus 
3. Pygidial area narrower, rounded at tip, longitudinally rugoso- 
punctate; spots on first abdominal segment transverse, con- 
fined eto apicale portion! «Of «SESIMell te... sas. ¢ yess cles = aequalis 
4. Last dorsal segment ciliated between the teeth............. 5 
4. Last dorsal segment not ciliated between the teeth, length 
SNe OM LUA EIT werent cre ta abartevoe shel svametavatat ela toleqstal/aa\atetoucts, oabelatens cteel erelicuie.es t 
5. Last dorsal segment not prominent between the teeth, subtruncate; 
lateral spots on the first dorsal segment large, covering al- 
MOSEMtIEW elAtITE, SEAMEN ts as/cle ste ceveye a bie¥e es wiviere sonic reals plagtatus 
5. Last dorsal segment prominently angulate between the teeth; spots 
on the first segment transverse, confined to apical portion 
OSE SUN) Ct Beers sate ta niadanstevetts ails) ore ehalete iscsi ie het aelenateiay eeaale 6 
6. Size large, 10-11 mm.; tubercles, collar and scutellum yellow, 
scape and femora entirely ferruginous; ventral punctures 
CEES) S ps RR SRY Opens Sie ain PA Pree ot aa aD Re ett aequalis 
6. Size smaller, 7-8 mm.; tubercles, collar and scutellum with- 
out yellow markings; scape and anterior and intermediate 
femora piceous; ventral punctures shallow.......... angularts 
Wee puomen: readish: vat. leasts basally: val «te ajclss cbs eecteis aaclecuen rufiventris 
Toe wromen, Tat satall reddish a. .cccdecswieta secoe.s9 gana ur simplicicornis 
Nysson rufiventris Cresson. 
1882. Nysson rufiventris Cresson, Transactions of the American En- 
tomological Society, ix, p. 283. 
HEP) 
