SYNOPSIS 



OF THE 



FAMILIES AND GENHRA 



OF THE 



HYMENOPTERA 



OF 



AMERICA, NORTH OF MEXICO, 



TOCETHER WITH A CATALOGUE OF THE 



DESCRIBED SPECIES, AND 



BIBLIOGRAPHY. 



COMPILED BY E. T. CRESSON. 



TRANSACTIONS 



amp:rican ENTOMOLOciiCAL socip:ty. 



SUPPLEMENTARY VOLUME, 



1887. 



V Entomoldgjcal Sf^anch 



^ \ DEPARTMENT OF 



^g^ AO«ICULTU«E 



1,^ OTTAWA. 



