The Larvae of Ochlerotatus dorsalis have pecten spines that go to about the middle of the siphon, all uniformly spaced.
 

There is a single pair of setae, usually with a few branches, just beyond the pecten.
 

The saddle does not completely encircle segment X on Dorsalis larvae.
 

The antennae on dorsalis larvae are short, with setae with three or more branches in the middle of the antennae.  The antennae also have rough spinules on them.
 
 
 
Ochlerotatus dorsalis Adult Page