Sept., 1916.] 



AcKERMAN : Carpenter-Bees of U. S. 



231 



Explanation of Plate id. 



Dorsal view of genitalia of Xylocopa arizonensis. 



Genitalia of Xylocopa californica. 



Genitalia of Xylocopa brasilianontm ccneipennis. 



Genitalia of Xylocopa brasilianornin brasilianorum. 



Genitalia of Xylocopa texana. 



Genitalia of Xylocopa virginica. 



Genitalia of Xylocopa tabaniformis. 



Genitalia of Xylocopa orpifex. 



Genitalia of Xylocopa micans. 



Side view of thorax of Xylocopa virginica. 



Anterior wing of female of Xylocopa virginica. 



Hind wing of female of Xylocopa virginica. 



Genitalia of Xylocopa fimbriata. 



Ventral view of sting of Xylocopa virginica. 



Front view of head of female Xylocopa ariaouensis. 



Front view of head of male Xylocopa virginica. 



Antenna of male Xylocopa californica. 



Mandible of female of Xylocopa finbriata. 



Mandible of female of Xylocopa virginica. 



Mandible of male of Xylocopa virginica. 



Tibia of female of Xylocopa virginica, with tibial scale. 



Index to Lettering of Plate 10. 



