THE NEOTROPICAL SPECIES OF THE ANT GENUS 
STRUMIGENYS FR. SMITH: SYNOPSIS AND KEYS 
TO THE SPECIES 1 
By William L. Brown, Jr. 
Department of Entomology, Cornell University 
Introduction 
The New World Strumigenys have been revised through a series of 
twelve papers bearing the general foretitle, “The Neotropical species 
of the ant genus Strumigenys Fr. Smith,” plus several articles by Dr. 
W. W. Kempf and by myself, beginning with my “Preliminary generic 
revision of the higher Dacetini” (Brown, 1948). It now seems appro- 
priate to offer a unifying synopsis of the New World species of the 
genus, along with keys for identification and some general remarks. 
Species Synopsis of New World Strumigenys 
The synopsis below includes the names, each with author and date 
of publication, plus citation of the principal references in the Brown 
or Kempf papers already mentioned, which are listed in the section of 
“References” at the end of this article. These papers contain refer- 
ences to original descriptive and distributional material for each species, 
but I have included in the synopsis new or supplementary information 
wherever it seemed useful to do so. The species are listed by groups 
in order of apparent relationship, as closely as it is possible to place 
them in a purely linear order. The probable relationships within the 
genus in the New World are discussed at the end of the synopsis. It 
will be noticed that the group placement of some species differs from 
that of the previous parts published. The present grouping represents 
a reconsideration of all of the New World species taken together. 
i Group of mandibularis 
I. Strumigenys mandibularis Fr. Smith, i860 
Brown, 1953b: 53-55, worker, synonymy. 
Frederick Smith confused two species under this name; one of these 
was later described as S. prospiciens by Emery. In order to fix these 
names unambiguously according to present usage, I hereby designate 
as lectotype of S. mandibularis the worker in the British Museum 
(Natural History), which was called “holotype” in my 1953 paper. 
Published) with the aid of a grant from the Grace Griswold Fund of the 
Department of Entomology, Cornell University. 
Manuscript received by the editor January 25, 1962. 
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