1962] 
Brown — Strumigenys 
249 
47. Strumigenys denticulata Mayr, 1887 
Brown, 1960: 47-48, fig. 3, worker, female. 
Biology: Occurs in both primary and second-growth forest, in leaf 
litter ; epiphytes and in termite nests. 
Distribution: Trinidad and the Guianas south to southeastern 
Brazil ; probably occurs widely in interior South America as well. 
48. Strumigenys jamaicensis Brown, 1959 
Brown, 1959b: 6, worker. Brown, 1960: 45-46, fig. 4, worker. 
Distribution : Mountains of Jamaica. 
49. Strumigenys gundlachi (Roger, 1862) 
Brown, 1960: 40-45, figs. 1, 5, worker, female, synonymy, distribution, biology. 
In addition to the characters cited in the key, it may be mentioned 
that fully-colored S. gundlachi workers and females are usually darker 
in color (brownish-red to dark brown) than are those of S. eggersi 
(ferruginous yellow). 
Biology: S. gundlachi feeds chiefly if not entirely on entomobryoid 
and sminthuroid Collembola, which it catches by employing a rela- 
tively inactive “ambush” type of hunting, but if the prey struggles 
after being struck, it may be lifted off the ground and stung in the 
manner of other Strumigenys. In many parts of the Caribbean coun- 
tries, this is a very abundant ant in the leaf litter of tropical forest, 
thickets and plantations, and it tolerates a wide variety of ecological 
conditions. 
Distribution : Central America and southern Mexico, southern 
Florida, West Indies to Trinidad. 
Synonyms: S. eggersi varieties vincentensis Forel, banillensis Sant- 
schi, isthmica Santschi and herlesei Weber; S. eggersi subsp. infuscaia 
Weber, and S. bierigi Santschi. 
50. Strumigenys eggersi Emery, 1890 (Figs. 10, 20) 
Brown, 1960: 46-47, figs. 2, 6, worker, female, variation, distribution, biology. 
Biology: Found in forests, thickets, gardens, etc. Almost certainly 
a collembolan feeder. 
Distribution: Trinidad and the Guianas to southeastern Brazil and 
Amazonian Bolivia. Widespread (possibly by recent introduction) in 
the West Indies; southern Florida; southern Mexico. 
Group of rogeri 
51. Strumigenys rogeri Emery, 1890 (Figs. 16, 17, 29) 
Brown, 1954, Bull. Mus. Comp. Zool., 112: 20-23, worker, female, feeding 
habits. 
Although S. rogeri was first described from West Indian material, I 
