1022 The American Naturalist. [November, 
esting parasite of Xylocopa, and which proved on examination to be 
Trichodactylus xylocope. 
As I know of no previous record of this Acarid, or any in this genus, 
being recognized in America, it seems worth while to mention it in the 
Naturalist. The specimens were taken from a Carpenter Bee and 
mounted in balsam by Mr. B. W. Griffith. The bee Mr. Coquillett 
says agrees with specimens named for him by Prof. Riley as Hylocopa 
c€neipennis. ; 
Doubtless this parasite could be found on Xylocopa in other localities 
and related species on Osmia and other related bees. 
HERBERT OSBORN. 
