10 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 123 



3 same data as hole-type [USNM]; 1-I'nt. [International] Paper Company 

 Excav. [Excavation], TIN, R3W, Sll, La., John C. Moser, in nest of Atta texana, 

 excav. 3/24/60, 12 feet, F. G. [fungus garden] [USNM]; 1-I'nt. Paper Co. Excav., 

 T2N, R3W, S10, La., John C. Moser, in nest Atta texana, March 25, 1960, central 

 cavity, in fungus garden [USNM]; 1-near Flatwoods, La., T4N, R4W, S30, nest 

 Atta texana, 30, Dec. 1958, J, Moser, 5 ft. detritus cavity (Woodruff). 



Host: (See under "Biology and Ecology" and "Distribution".) 

 Known only from nests of Atta texana (Buckley) in Louisiana. The 

 distribution of this ant is shown on the map (fig. 1). 



Euparixia duncani Brown 



Figure 6 



Euparixia duncani Brown 1927, pp. 288-289. [Type: Globe, Ariz.; Canadian 

 National Collection.] 



Length 5.0 to 5.75 mm, width 2.0 to 2.4 mm. Elongate, convex, 

 feebly shining (often encrusted with light-colored dirt), reddish brown, 

 darker at clypeal and posterior pronotal margin. Legs and venter 

 similarly colored but slightly darker than dorsum. Pronotum con- 

 stricted basally at sides with anterolateral margin explanate. 



Head: Clypeus truncate across middle one-third, sides feebly 

 curving to prominent genal lobes. Eyes not visible when head is in 

 repose. Clypeal apex inflexed ventrally at middle. Head finely, 

 densely punctured on basal one-third, gradually diminishing to 

 slightly granulate at middle and evenly, finely granulate on anterior 

 one-third. 



Pronotum: Broader than long, convex. Punctation like pits at 

 base but becoming less coarse and less dense toward anterior band. 

 Lateral explanate portion nearly im punctate. Sides explanate on 

 anterior two-thirds; posterior angle obliterated, but the one at con- 

 striction acute (nearly 90°). Pronotum much narrower at base than 

 the elytra. Pronotal outline as in figure 2. 



Elytra: Together suboval, widest at apical one-third; intervals 

 acutely carinate, striae deep, punctate. The lateral cariniform mar- 

 gin forms a "tooth" on each side in front of humeri. Punctures 

 complicated, but appearing quadrate on disc, gradually becoming 

 less distinct toward sides. Carinate intervals with single row of 

 regularly spaced, very minute, short setae in center. Scutellum 

 elongate, depressed basally at middle. 



Sternum: Prosternum weakly angulate posteriorly at middle. 

 Mesosternum with coxae widely separated basally by more than length 

 of trochanter of middle leg; median area smooth but alutaceous, 

 bordered laterally by a raised, flattened, smooth, diverging, slightly 

 arcuate border that quickly widens from a fine carina at base of the 

 coxa to the wide flat edge overlapping the coxal edge from basal 



