  We present a digital atlas of peculiar, high-luminosity massive stars in the
near-infrared region (10470-11000 A) at medium resolution (R~7000). The spectra
are centered around He I 10830 A, which is formed in the wind of those stars,
and is a crucial line to obtain their physical parameters. The instrumental
configuration also sampled a rich variety of emission lines of Fe II, Mg II, C
I, N I and Pa gamma. Secure identifications for most spectral lines are given,
based on synthetic atmosphere models calculated by our group. We also propose
that two unidentified absorption features have interstellar and/or
circumstellar origin. For the strongest one (10780 A) an empirical calibration
between E(B-V) and equivalent width is provided. The atlas displays the spectra
of massive stars organized in four categories, namely Be stars, OBA Iape (or
luminous blue variables, LBV candidates and ex/dormant LBVs), OB supergiants
and Wolf-Rayet stars. For comparison, the photospheric spectra of non
emission-line stars are presented. Selected LBVs were observed in different
epochs from 2001 to 2004, and their spectral variability reveals that some
stars, such as Eta Car, AG Car and HR Car, suffered dramatic spectroscopic
changes during this time interval.
