Well, it is not july and this is not really a varroa, but be careful next month, George Imirie wrote that varroa kills in July.
(http://img461.imageshack.us/img461/1976/dsc09525tb7.th.jpg) (http://img461.imageshack.us/my.php?image=dsc09525tb7.jpg)
It´s a female crab (centolla) disguised as a coral that I have eaten. 8-)
Varroa can kill a hive anytime. But they usually die from Varroa in the fall or early winter.