Measurements of cross sections are presented for excitation of Balmer alpha and Lyman alpha emissions in collisions of 1.98- to 24.6-keV hydrogen atoms with N2 and O2. Estimates of corrections required for cascade contributions and lack of excited state equilibrium are also given. At 1.87 keV, Lyman alpha and Balmer alpha cross sections reach their largest value, indicating maxima in these cross sections at or below 2 keV. Except for differences in absolute values for Lyman alpha cross sections, the results agree well with the work of others where comparison can be made.