  The H II regions LMC N191 and SMC N77 are among the outermost massive
star-forming regions in the Magellanic Clouds. So far, few works have dealt
with these objects despite their interesting characteristics. We aim at
studying various physical properties of these objects regarding their
morphology (in the optical and Spitzer IRAC wavelengths), ionized gas emission,
nebular chemical abundances, exciting sources, stellar content, age, presence
or absence of young stellar objects, etc. This study is based mainly on optical
ESO NTT observations, both imaging and spectroscopy, coupled with other archive
data, notably Spitzer images (IRAC 3.6, 4.5, 5.8, and 8.0 microns) and 2MASS
observations. We show the presence of two compact H II regions, a
low-excitation blob (LEB) named LMC N191A and a high-excitation blob (HEB)
named SMC N77A, and study their properties and those of their exciting massive
stars as far as spectral type and mass are concerned. We also analyze the
environmental stellar populations and determine their evolutionary stages.
Based on Spitzer IRAC data, we characterize the YSO candidates detected in the
direction of these regions. Massive star formation is going on in these young
regions with protostars of mass about 10 and 20 M_sun in the process of
formation.
