B. Michael Glancey, Clifford S. Lofgren, Spermatozoon Counts in Males and Inseminated Queens of the Imported Fire Ants, Solenopsis invicta and Solenopsis richteri (Hymenoptera: Formicidae), The Florida Entomologist, Vol. 68, No. 1 (Mar., 1985), pp. 162-168
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