X-ray observations of galaxies made with the Einstein and ROSAT
 satellites have shown that some galaxies with powerful bursts of
 star formation are luminous in X-rays (e.g. Fabbiano 1989). For
 example, NGC 5408, a nearby extragalactic HII region galaxy which
 is optically less luminous than the Small Magellanic Cloud was
 found to have an X-ray luminosity greater than that of the whole
 Local Group (Stewart et al. 1982). It is bright in both the
 near and far infrared, and Campbell & Terlevich (1984) have deduced
 from infrared colors that its burst of star formation occured
 only about 2 Myr ago. Fabian & Ward (1993) have proposed a starburst
 origin for the X-rays where approximately 1000 supernovae blow a
 100 pc bubble of hot gas in the ISM which radiates bremsstrahlung.
 IC 10 is a gas rich Local Group galaxy that is also X-ray luminous
 (Boller et al. 1990). Infrared and optical images show that most of
 its star-forming activity is concentrated in a pair of bright
 complexes about 1.1 kpc (3 arcmin) apart near the geometric center
 of the galaxy (Sandage & Tamman 1974, Hunter & Gallagher 1985,
 Hodge & Lee 1989). It has a large nonthermal radio source in its
 center which is roughly circular in shape, and Yang & Skillman
 (1993) suggest that this nonthermal superbubble is the result of many
 supernova explosions, as in NGC 5408.
 We propose to use ISOCAM to make maps of both NGC 5408 and IC 10
 in the lines of [Ar III], [Ne II] and [Ne III]. Maps in these
 lines will allow us to quantify the ionization of the ISM by the
 violent processes occuring in these galaxies and will reveal
 the dusty birth and death sites of stars. We also propose to obtain
 an LWS full grating spectrum of NGC 5408, which has extremely
 strong emission lines. NGC 5408 will probably provide the best ISO
 template for X-ray starbursts and one of the best templates for
 low metalicity HII region galaxies.