Scullen, Herman A.

A revision of the genus Eucerceris cresson (Hymenoptera:Sphecidae) - Washington : Simthsonian Institution, 1968 - 96 p. : ilus. - U.S. National Museum Bulletin ; 268 . - U.S. National Museum Bulletin ; 268 .

55773


Eucerceris.

595.79 / S2