We propose to obtain the infrared spectral energy distributions of 15
gamma-ray blazars from the Second EGRET Catalog which are not included
in the Guaranteed or approved Open Time proposals. This increases the
size of a statistically complete sample from 26 to 41 objects.  The
infrared emission in blazars is dominated by highly beamed synchrotron
radiation from a relativistic jet.  Photons from the peak of the
synchrotron energy output (in the infrared for most high-luminosity
blazars) or from an external radiation field are inverse-Compton
scattered to gamma-ray energies by the synchrotron-emitting electrons.
The infrared spectral shape is vital to constraining models of the
broad-band emission in this objects by characterizing the physical
parameters of the relativistic charged particles which do the
scattering.