The pecten spines reach about
the middle of the siphon. They are all
evenly spaced.
After the pecten spines, triseriatus
larvae have a single pair of setae on the siphon.
The saddle of triseriatus
does not completely encircle
segment X.
The antennae of Ochlerotatus
triseriatus are smooth, with one or two setae in the middle of
the antennae.