The Sphegoidea of Nebraska 19 
red, excepting the anterior and intermediate femora, which are piceous 
with the apices reddish. Wings hyaline, faintly clouded. 
9. Unknown. 
Type, a male taken at West Point, Nebraska (L. Bruner). 
One paratype, same locality. Besides differing from aequalis 
as indicated in the key, the mesopleura are much less convex, not 
nearly so much bulged outwardly. 
Nysson fidelis Cresson. 
1882. Nysson fidelis Cresson, Transactions of the American Ento- 
mological Society, ix, p. 282. 
1896. Nysson fidelis Fox, Journal of the New York Entomological 
Society, iv, p. 15. 
A single female, taken in Warbonnet canyon, Sioux county. 
Subfamily ALYSONINAE 
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 
Grete GES aly (SEMUMEUIE $ .j2lerd< oun oid srnlanetasletewisi nes Cielelait ices 63% 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 
SECONCM COSA SEOIIEIIED Paiocieciscatiere <td eee ieie co. celeste te tetesiere Didineis 
Genus Alyson Jurine 
SYNOPSIS OF THE SPECIES 
Median area of metanotum triangular; at least first abdominal seg- 
ment, and usually part of second, in male red, in female black; 
eigpeus.yellow, legs reddish. .% . 5. ccc cscs. der ewied once. ‘ .triangulifer 
Median area of metanotum not triangular, usually U-shaped.......... 1 
1. Thorax and abdomen black, pygidium red; legs fulvous, partly 
yellowish in male; tubercles yellow.................- radiatus 
1. Thorax, abdomen, and legs entirely reddish; head dark........melleus 
Alyson triangulifer Provancher. 
1887. Alyson triangulifer Provancher, Additions a la Faune du Canada, 
Hymenoptera, p. 272. 
1894. Alyson trianguliferus Fox, Entomological News, v, p. 86. 
One female, three males, taken at West Point, during June 
(H. S. Smith), and at Glen, August 14 (P. R. Jones). 
Alyson radiatus Fox. 
1894. Alyson radiatus Fox, Entomological News, v, p. 87. 
341 
