64 
Psyche 
[March-June 
Fig. 1. Nesting-site of E. memorialis Banks at Chittenango, N. Y. Indi- 
vidual nests occupied the upper portion of cliff, among roots. 
a sandy river bed in New Mexico with a Diabrotica tricincta Say 
( Chrysomelidae : Galerucinae) . 
Entomognathus ( Toncahua ) memorialis Banks 
Ecology. Krombein (1963) characterized this species as a sylvi- 
colous form which nests in rather heavy soil. He recorded specimens 
from Connecticut, New Jersey, Maryland, District of Columbia, 
Virginia, and Kansas. We observed small aggregations of this 
species flying near the tops of 1-6-ft-high sand cliffs at Chittenango, 
Madison Co., N. Y. (Fig. 1) during 19-28 August 1970 and 12 July 
1971, and at Presque Isle St. Pk., Erie Co., Pa. from 4 to 9 July 
1971. Both sites bordered bulldozed sandy fields near stands of 
deciduous northern hardwoods. At Chittenango, other sphecids 
nesting in the cliff included Philanthus politus Say, Oxybelus bi~ 
punctatus Oliv., O. emar ginatus Say, and Xyloceiia sp. Cliff-nesting 
sphecids at Presque Isle comprised Miscophus americanus Fox, 
Philanthus gibbosus ( F. ) , and Xyloceiia franciemonti Krom. 
Mating Behavior. Ten males and three females were observed 
flying in front of the sand cliff at Presque Isle during the 6-day 
observation period. The males continuously circled a small Rubus 
plant at the base of the cliff and attempted to mate with small 
