Crematogaster (Crematogaster) sewelli Forel
  Type location Madagascar
(Cremastogaster inermis, 2e Race. Cremastogaster
Sewelli, n. stirps, Forel, 1891b: 196, illustrated, worker; raised
to
species by Dalla Torre, 1893: 86) Imerino - see below
subspecies
dentata (Dalla Torre, 1893: 86, worker) from Madagascar
- see below
improba (Forel, 1907g: 80,
footnote, worker) from Madagascar - see http://www.antweb.org/specimenImages.do?code=casent0101677
mauritiana (Forel,
1907g: 79, worker) from Mauritius
- see http://www.antweb.org/specimenImages.do?code=casent0101665
worker only described (see Bolton,
1995)  .
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Forel's (1891b) description is at  (illustration unavailable).
From the remarks by Emery (1893c) on alluaudi,
from the Canary Islands, and Crematogaster
inermis, lacking in propodeal spines or teeth. I have separated
the mainland forms with distinct short propodeal teeth off as a
distinct species Crematogaster
marnoi (light brown from Sudan) and Crematogaster
acis (dark brown, with more prominent propodeal teeth) from
West Africa.
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The
photomontage of the type worker is collated from 
The photomontage of the dentata type specimen
from Madagascar is collated from