  We present a measurement of the spectral index of density fluctuations
between ion and electron scales in solar wind turbulence using the EFI
instrument on the ARTEMIS spacecraft. The mean spectral index at 1 AU was found
to be -2.75 +/- 0.06, steeper than predictions for pure whistler or kinetic
Alfven wave turbulence, but consistent with previous magnetic field
measurements. The steep spectra are also consistent with expectations of
increased intermittency or damping of some of the turbulent energy over this
range of scales. Neither the spectral index nor the flattening of the density
spectra before ion scales were found to depend on the proximity to the pressure
anisotropy instability thresholds, suggesting that they are features inherent
to the turbulent cascade.
