iv list of papers. 



Robertson, Charles. 



Synopsis of Megachilida? and Bombing . . . 163 



Skinner, Henry. 



A List of the Insects of Beulah, New Mexico . . 35 



Van Duzee, Edw. P. 



(Heraiptera of Beulah, New Mexico) .... 107 



Viereok, H. L. 



(Hymenoptera of Beulah, New Mexico) . . . 43 



Classification of Bees of the Genus Bombomelecta . 17H 



