VII. 



REPORT 



UPON 



THE COLLECTIONS OF HYMENOPTKRA 



MADE LN* 1'OliTIONS OF 



NEVADA, UTAH, COLORADO, NEW MEXICO, AND ARIZONA, 



DURING 



THE YEARS 1872, 1873, AND 1874. 



BY 



E. T. CRESSON. 



WITH 



LIST OF FORMIC1DAE. 



HY 



EDWARD NORTON. 

 45 z 



703 



