Of course he hadn't checked. Ron hated spiders more than anyone in the world possibly could. If Pomfrey hadn't assured him Hermione was spider free, Ron wouldn't have been sitting next to her.
"Pomfrey checked a few times. And they are all gone. I promise." He wasn't going to tell her that they had been in her hair. That was just cruel. Ron looked around the annoyingly empty hospital wing and wished there was some one else around to fill the space. "At least you have a reason not to go near them in class now," he offered.