NEW RECORD FOR THE ENDANGERED CRAWLING WATER BEETLE, BRYCHIUS-HUNGERFORDI (COLEOPTERA, HALIPLIDAE) IN MICHIGAN INCLUDING WATER CHEMISTRY DATA

We report the discovery of the Federally endangered crawling water bee tle, Brychius hungerfordi Spangler, in a new watershed in the northern lower peninsula of Michigan. The site was found on the Carp River, a lake draining first-order stream. Nine water chemistry parameters were measured from three known locations of B. hungerfordi and from three sites where no B. hungerfordi have been found. Water from sites with k nown populations of adult beetles showed low soluble reactive phosphor us, but were similar to other similar rivers in northern Michigan.