Sphecoidea of Nebraska 85 
Sphex alberti (Haldeman). 
. ‘ 1852. Ammophila alberti Haldeman, Stansbury: Explor. Salt Lake, p. 
mth. 368. 
1879. Ammophila alberti Patton, Bull. U. S. Geol. Surv., V, p. 353. 
1903. Ammophila aberti Melander, Psyche, X, p. 160. 
¥ 
p. } nt aa 
Bites breviceps -(F. Smith). 
Ke =~ 1856. Ammophila breviceps F. Smith, Cat. Hym. Brit. Mus., IV, p. 
E = 221. 
1865. Ammophila varipes Cresson, Proc. Ent. Soc. Phil., IV, p. 457. 
1903. Ammophila breviceps Melander, Psyche, X, p. 160. 
Males 35, females 40: Omaha (6), Ashland (1), Fairmont (2), 
Red Cloud (1), Curtis (2), Imperial (2), Oxford (1), Haigler 
(1), Dundy county (1), Bridgeport (1), Kimball (11), Mitchell 
(28), Harrison (4), Glen (8), Warbonnet Canyon (1) and 
Sioux county (5); June 18 to September 11; visits flowers of 
Melilotus alba, Helianthus petiolaris, Cleome serrulata, Solidago 
sp. and Petalostemum sp. 
Sphex ferruginosus (Cresson). 
1865. Ammophila ferruginosa Cresson, Proc. Ent. Soc. Phil., IV, p. 
1903. ae vite ferruginosa Melander, Psyche, X, p. 160. 
Females 28: Imperial (1), Haigler (1), Halsey (1), Mitchell 
(19), Pine Ridge (4), Monroe Canyon (1) and Glen (1) ; June 
9 to September 12. 
It is quite probable that cressoni is the male of this species. 
In each case the opposite sex is unknown and this series of 
twenty-eight females was collected in the same general locality 
and shows practically the same seasonal distribution as the five 
males of cressoni. In structure the two species seem to show no 
differences except in the usual secondary sexual characters which 
are found in this genus. From these circumstances it would seem 
that these two are but a single species and probably further col- 
lecting will prove this td be the case. 
403 
