Studies of this type are of necessity rather opportunistic, i.e., one has to take advantage of the species abundant in the area that season. Most solitary wasps exhibit large fluctuations in abundance. For this reason, my research this year developped along somewhat different lines than anticipated. Project Number 115.
Evans, Howard E.
"Comparative Ethology of Solitary Wasps,"
Jackson Hole Research Station Annual Report: Vol. 1964
, Article 7.
Available at: http://repository.uwyo.edu/jhrs_reports/vol1964/iss1/7