Sphecoidea of Nebraska 57 
Solenius (Protothyreopus) rufifemur (Packard). 
1866. Crabro rufifemur Packard, Proc. Ent. Soc. Phil., VI, p. 81. 
1895. Crabro rufifemur Fox, Trans. Amer. Ent. Soc., XXII, p. 158. 
Males 19, females 13: Omaha (4), Lincoln (8), Fairmont (1), 
West Point (5), Hardy (1), Mitchell (1), Gordon (2), Glen (8) 
and Harrison (2); June 24 to September 10; visits flowers of 
Chamaecrista fasciculata, Petalostemum sp., Melilotus alba and 
Solidago sp. 
Solenius (Protothyreopus) dilectus (Cresson). 
1865. Crabro dilectus Cresson, Proc. Ent. Soc. Phil., 1V, p. 478. 
1895. Crabro dilectus Fox, Trans. Amer. Ent. Soc., XXII, p. 156. 
Males 1: Harrison, August 4, 1908 (C. H. Gable) ; visits 
flowers of Helianthus sp. 
Solenius (Clytochrysus) nigrifrons (Cresson). 
1865. Crabro nigrifrons Cresson, Proc. Ent. Soc. Phil., IV, p. 482. 
1895. Crabro nigrifrons Fox, Trans. Amer. Ent. Soc., XXII, p. 145. 
Females 5: Omaha (2) and Monroe Canyon (3); July 7 to 
August 20, 
Solenius (Clytochrysus) obscurus (F. Smith). 
1856. Crabro obscurus F. Smith, Cat. Hym. Brit. Mus., IV, p. 418. 
1895. Crabro obscurus Fox, Trans. Amer. Ent. Soc., XXII, p. 143. 
Males 1, females 3: Omaha (3) and Ashland (1); May 28 to 
August 24. 
Solenius (Xylocrabro) stirpicolus (Packard). 
1866. Crabro stirpicola Packard, Proc. Ent. Soc. Phil., V1, p. 111. 
1895. Crabro stirpicolus Fox, Trans. Amer. Ent. Soc., XXII, p. 148. 
Males 3, females 9: Omaha (6), Lincoln (2), West Point (3) 
and South Sioux City (1); June 22 to August 20; visits flowers 
of Chamaecrista fasciculata and Dicrophyllum sp. 
Solenius (Xestocrabro) sayi Cockerell. 
1824. Crabro sexmaculatus Say, Long’s Expedition, Il, App., p. 341. 
1895. Crabro sexmaculatus Fox, Trans. Amer. Ent. Soc., XXII, p. 
146. 
1916. Solenius sayi Rohwer, Hym. of Conn., p. 667. 
IAS 
