Studies in the sawfly genus hoplocampa
Rohwer, S.A.
Studies in the sawfly genus hoplocampa - Washington 1911 - 140-148 p. - United States Department of Agriculture. Technical Series No. 20 Part IV .
Studies in the sawfly genus hoplocampa - Washington 1911 - 140-148 p. - United States Department of Agriculture. Technical Series No. 20 Part IV .