Published online by Cambridge University Press: 31 May 2012
The digger wasp, S. breviceps, has been encountered frequently in the field while studying nesting bees and wasps. Ammophila pruinosa Cress., A. varipes Cress., and A. comanche Cam., according to Professor Fernald, must be considered as synonyms. It is a specics of considerable morphological variation with all intergrades occuring between the extremes. It is not a large insect but it makes up in numbers, it would seem, for what it lacks in individual size.
page 49 note * Kindly determined by Professor H. T. Fernald.
page 49 note ** Fernald, H. T. “Notes on Some American Sphecinae.” Ann. Ent. Soc. Amer. Vol. 24, pp. 448, 449.
page 52 note * Determined as this species or an unnamed variety very close to it.