Sphecoidea of Nebraska 87 
Canyon (18), Bad Lands (1), Warbonnet Canyon (4), and Sioux 
county (28); May 22 to October 11; visits flowers of Solidago 
glaberrima, Amorpha canescens, Medicago satiwa, Cleome sp. and 
Melilotus alba. 
Sphex argentatus (Hart). 
1907. Ammophila argentata Hart, Bull. Ill. Lab., VII, p. 267. 
Males 4, females 7: West Point (1), Holt county (1), Neligh 
(2), Halsey (6) and Glen-(1) ; June 9 to August 25. 
Sphex strenuus (Cresson). 
1865. Ammophila strenua Cresson, Proc. Ent. Soc. Phil., IV, p. 459. 
1903. Ammophila strenua Melander, Psyche, X, p. 161. 
Males 3, females 6: Glen (3), Monroe Canyon (5) and Sioux 
county (1); August 3 to August 20; visits flowers of Monarda 
sp. 
Sphex junceus (Cresson). 
1865. Ammophila juncea Cresson, Proc. Ent. Soc. Phil., IV, p. 460. 
1903. Ammophila juncea Melander, Psyche, X, p. 161. 
Males 5, females 5: Mitchell (1), Glen (1), Monroe Canyon 
(7) and Bad Lands (1); July 14 to August 19. 
Psammophila Dahlbom 
KEY TO THE SPECIES 
1. Body wholy black; pubescence in part white, face silvery (male) or 
pubescence splack CLemale;..cc. sisicats ees 'eaiclacavece cette ate wines luctuosa 
Pinoomen. More_or less, fermipiwiGUS <2. 2.6.08 cass dene vasasc# en 2 
2. Petiole of abdomen short, not extending beyond hind trochanters, 
grossa 
Petiole of abdomen long, extending much beyond hind trochanters.. 3 
3. Large species, very robust, 22-26 mm.; abdomen of female entirely 
ee CMES OS 25s eH eccasa tel dn eelak otek esa > = ok Eeisa Hee oe valida 
Smaller species, 14-18 mm.; abdomen of female in part black, 
violaceipennis 
Psammophila luctuosa (F. Smith). 
1856. Ammophila luctuosa F. Smith, Cat. Hym. Brit. Mus., IV, p. 224. 
1903. Psammophila luctuosa Melander, Psyche, X, p. 158. 
Males 43, females 80: Ashland (1), Brady Island (5), Mitchell 
(23), Halsey (11), Crawford (2), Harrison (8), Glen (1), Mon- 
405 
