What is this rosdep error?

Trying to get the dependencies for a camera with the following command:
mike@spinach:~/ros_workspace$ rosdep install prosilica_camera And I get the following error:
ERROR: Rosdep cannot find all required resources to answer your query
Missing resource prosilica_camera
ROS path [0]=/opt/ros/fuerte/share/ros
ROS path [1]=/home/mike/ros_workspace
ROS path [2]=/opt/ros/fuerte/share
ROS path [3]=/opt/ros/fuerte/stacks What is wrong with my install? I have run rosdep update.