246 
Psyche 
[December 
Brown, 1959a: 101-102, worker. Brown, 196: 58-60, worker variation, distri- 
bution. 
Distribution: Central Panama. 
Group of silvestrii 
35. Strumigenys silvestrii Emery, 1905 (Fig. 18) 
Brown, 1959c: 25-28, fig. 1, worker, female, synonymy, variation, distribution. 
Distribution: Northern Argentina, southern Brazil; also in Cuba 
and Louisiana, U. S. A., where probably introduced by commerce. 
Synonym : S. caribbeci Weber. 
36. Strumigenys carinithorax Borgmeier, 1934 
Brown, 1959c: 29-30, worker, female, male. 
Distribution : Dutch Guiana : vicinity of Paramaribo. 
37. Strumigenys schmalzi Emery, 1905 
Brown, 1959c: 28-29, worker. 
Distribution : Southeastern Brazil. 
38. S tru m igenys perparva Brown, 1958 
Brown, 1958c: 133-135, fig. la, worker, female. 
Distribution: Trinidad and the Guianas to Sao Paulo; probably 
interior Brazil. 
Group of louisianae 
39. Strumigenys mixta Brown, 1953 (Figs. 15, 21) 
Brown, 1953a: 4-5, worker. 
Biology: One of the two original series was taken in orchid plants 
at quarantine, so the species may be arboreal or subarboreal. 
Distribution: Guatemala; known only from the types (two locali- 
ties) . 
40. Strumigenys louisianae Roger, 1863 
Brown, 1953a: 2-3, description of synonymous S. clasmospongia, worker. 
Brown, 1953d: 28-31, figs. 1, 3, worker, variation, synonymy, distribution. 
Brown, 1961: 64-68, geographical variation, synonymy. 
Biology: The feeding habits of this species have been studied in 
some detail by Wilson (1950, 1954) and by myself. The food con- 
sists of a variety of small arthropods found in and on the soil cover 
and caught by the workers with their trap-like jaws. The preferred 
prey are entomobryoid and symphypleonan Collembola; poduroid 
collembolans are not taken. 
Distribution : Widespread in the Americas from Virginia and 
Tennessee south at least to the Tucuman area of Argentina; north- 
