The Mitchell Spectrograph (a.k.a. VIRUS-P) on the 2.7？m Harlan J. Smith telescope at McDonald Observatory is currently the largest field of view (FOV) integral field unit (IFU) spectrograph in the world ( ). It was designed as a prototype for the highly replicable VIRUS spectrograph which consists of a mosaic of IFUs spread over a diameter FOV feeding 150 spectrographs similar to the Mitchell. VIRUS will be deployed on the 9.2 meter Hobby-Eberly Telescope (HET) and will be used to conduct the HET Dark Energy Experiment (HETDEX). Since seeing first light in 2007 the Mitchell Spectrograph has been widely used, among other things, to study nearby galaxies in the local universe where their internal structure and the spatial distribution of different physical parameters can be studied in great detail. These observations have provided important insight into many aspects of the physics behind the formation and evolution of galaxies and have boosted the scientific impact of the 2.7 meter telescope enormously. Here I review the contributions of the Mitchell Spectrograph to the study of nearby galaxies, from the investigation the spatial distribution of dark matter and the properties of supermassive black holes, to the studies of the process of star formation and the chemical composition of stars and gas in the ISM, which provide important information regarding the formation and evolution of these systems. I highlight the fact that wide field integral field spectrographs on small and medium size telescopes can be powerful cost effective tools to study the astrophysics of galaxies. Finally I briefly discuss the potential of HETDEX for conducting studies on nearby galaxies. The survey parameters make it complimentary and competitive to ongoing and future surveys like SAMI and MANGA. 1. Introduction The Mitchell Spectrograph (a.k.a. VIRUS-P) was commissioned in early 2007 on the 2.7？m Harlan J. Smith telescope at McDonald Observatory. It is owned and operated by the University of Texas at Austin and was designed as a prototype for the Visible Integral Field Replicable Unit Spectrograph (VIRUS; [1]), a massively replicated fiber-fed IFU spectrograph for the 9.2？m Hobby-Eberly Telescope (HET). VIRUS consists of a mosaic of 75 50′′ × 50′′ IFUs spread regularly with a 1/4 filling factor over a diameter field of view. The IFUs themselves have a 1/3 filling factor and feed 150 spectrographs similar to the Mitchell Spectrograph. VIRUS will be used to conduct the HET Dark Energy Experiment (HETDEX; [2–4]), a large (~90？ ) blind integral field spectroscopic survey aimed at
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