1961] 
Brown — Strumigenys 
67 
significant South American samples reviewed since 1953, and giving 
certain measurements and proportions as known for the combined 
samples from each region (n = number of workers in each combined 
sample) . 
Southeastern United States (8 localities in 5 states) : HL 0.52-0.61, 
ML 0.27-0.23 mm; Cl 82-87, MI 52-57 (n = 15). Guatemala and 
Costa Rica: HL 0.50-0.58, ML 0.27-0.33 mm; Cl 83-85 (n = 11). 
Cuba and Puerto Rico: HL 0.52-0.60, ML 0.26-0.32 mm; Cl 83-87, 
MI 51-56 (n = 11). Colombia (Rio Porce and Medellin, leg. N. A. 
Weber) : HL 0.54-0.61, ML 0.32-0.34 mm; Cl 71-84, MI 55-56 
(11 = 3). Surinam (La Poulle and Dirkshoup, leg. I. van der Drift) : 
HL 0.49-0.53, ML 0.29-0.30 mm; Cl 83-86, MI 57-59 (n = 2). 
Goias (Anapolis, leg. W. W. Kempf) : HL 0.47, ML 0.23 mm; Cl 
85, MI 49 (n = 1). Southeastern Brazil (States of Rio de Janeiro, 
Sao Paulo, Santa Catarina and Rio Grande do Sul) : HL 0.46-0.58, 
ML 0.28-0.37 mm ; Cl 77-92, MI 56-67 (n ^ 22). Bolivia (Rosario, 
leg. W. M. Mann) : HL 0.50-0.53, ML 0.31-0.32 mm; Cl 81-83, 
MI 60-63 (n — 6). Holotype female of var. longicornis from Coroi- 
co, Bolivia: TL 3.0, HL 0.66, ML 0.38, WL 0.77 mm; Cl 85, MI 
58. Northern Argentina (3 localities) : HL 0.49-0.64, ML o. 26-0.35 
mm; Cl 83-89, MI 52-56 (n = 6). 
An additional record of interest is a sample of 5 . louisianae from 
Yuma, Arizona, “on cotton,” “HAGA” leg. 
Descriptive Note on the Holotype of S. fusca 
Holotype worker: TL 3.4, HL 0.67, ML 0.40, WL 0.71 mm; 
Cl 82, MI 59. A large variant of S. louisianae ; mandibles farther 
apart and relatively more slender than in North American louisianae 
samples ; inner margins not so sharply concave near apex. Apical fork : 
dorsal tooth about 0.12 mm long, ventral about 0.09 mm; two sub- 
equal intercalary denticles. Preapical tooth about 0.05 mm long, and 
its tip situated about 0.05 mm from dorsal apical tooth ; slightly curved 
toward mandibular apex; larger and farther from apical fork than in 
most S. louisianae. No other teeth or denticles on inner mandibular 
border. Scape L 0.44, funiculus L 0.58 mm. 
Promesonotum high, with convex profile, promesonotal suture (sul- 
cus) visible in some lights. Metanotal groove weak. Propodeal teeth 
acute, elevated, with narrow infradental lamellae approaching carini- 
form; teeth about 4/5 as long as the distance between their basal cen- 
ters. Petiolar peduncle longer than node; node broader than long. 
Postpetiole robust, fully punctulate, opaque. Spongiform appendages 
as usual for S. louisianae. Gastric costulae extending about 1/2 the 
