14 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 123 



Diagnosis: Differs from all known species in shape of the pronotal 

 outline (fig. 3), but most similar to E. moseri, new species, in this 

 respect. It can be separated from this species by the more prominent 

 angle at the middle of the constriction and by the angle of the pos- 

 terior portion of the explanate sides pointing more outward and making 

 a more acute angle. It also differs in geographic distribution and 

 host ant. 



Specimens examined: Total 4; 1 — [holotype no. 53329] Cuba, Camaguey, 

 Baragua, V-24-32, at light, Christenson [USNM]; 1— [paratype no. 53329] Cuba, 

 E.E.A. Estacion Experimental Agricola Ento. No. 11,268 : Santiago, de las Vegas, 

 Havana, May 2, 1946, Ing. Naranjo, en nido de bibijagua [USNM]; 1 — near 

 Havana, Cuba, Fernando de Zayas (Z) ; 1 — [paratype no. 53329] Santiago de las 

 Vegas, Havana, Cuba, July 20/24, det. '36 H. E. Hinton as Euparixia formica 

 Hntn. [USNM]. 



Host: Atta insularis, which is known only from Cuba and is most 

 closely related to Atta texana. 



Euparixia formica Hinton 



Figure 8 



Euparixia formica Hinton 1934, pp. 27-28. [T}^pe: Tejupilco, Mexico; California 

 Academy of Sciences.] 



Length 4.65 mm; width 1.95 mm. Elongate, convex, feebly 

 shining, dark reddish brown. Pronotum constricted basally at sides 

 with the anterolateral margin narrowly 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, very convex. Punctation like 

 dense, coarse pits at base, becoming less coarse and less dense toward 

 anterior band. Lateral explanate portion nearly impunctate. Sides 

 explanate narrowly on anterior two- thirds; posterior angle obliterated, 

 but the one at the constriction rounded, gradually sloping to base. 

 Pronotum much narrower at base than the elytra. Pronotal outline 

 as in figure 4. 



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

 acutely carinate, striae deep, punctate. The lateral cariniform margin 

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

 plicated, 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. 



