Curiously, they make no reference to the worker shown
below and do not provide any illustration.
The photomontage is
collated from http://www.antweb.org/specimen.do?name=SAM-HYM-C000707A
(where the tone seems to be too red and I have applied a correction).
Note this specimen appears to be smaller than described by Arnold
(1947) but the general form and characters are a match.