16 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 123 



ant has a wide distribution, as shown in figure 1, E. formica is known 

 only from the type-locality in south central Mexico. 



Specimens examined: 1 — Tejupilco, Mex., Temascaltepec, 23-VI-33, H. E. 

 Hinton and R. L. Usinger, Paratype No. 54675 [USNM]. 



Euparixia costaricensis Hinton 



Figure 7 



Euparixia costaricensis Hinton 1936, pp. 274-275. [Type: Costa Rica; United 

 States National Museum, No. 54674.] 



Holotype: Length 4.5 mm, width 2.2 mm. Elongate, convex, 

 moderately shining, very dark brown with margins of pronotum and 

 head reddish brown. Legs and venter similarly dark brown. 



Head: Clypeus widely, shallowly emarginate between small tri- 

 angular teeth, apex inflexed ventrally at middle; sides very weakly 

 reflexed and weakly arcuate, length from teeth to right-angled, moder- 

 ately sharply rounded genae equal to that between the teeth. Head 

 moderately convex, weakly rugose in front between teeth, very fine, 

 well-separated punctures, separated by three diameters, over anterior 

 of median convexity and outward toward genae, gradually elongate, 

 larger and closer, to dense, coarse and round across the base. Frontal 

 suture not visible. 



Pronotum: Subquadrate; width 1.8 mm, length 1.2 mm. Anterior 

 angles broadly rounded; posterior angles noticeably angulate and 

 rather sharply rounded; base strongly margined, broadly evenly 

 arcuate, the line of curvature continuing forward inside the posterior 

 angles. Lateral margin with a slight but noticeable angle slightly in 

 front of the middle. Surface deeply impressed laterally at anterior 

 third behind the eyes, leaving the anterior angles wide, flat, and 

 explanate, this flattened margin continued narrowly posteriorly to 

 and including the posterior angles; another rather deep, elongate 

 depression paralleling the base, midway between anterior and pos- 

 terior margins with the ends of this fovea equidistant from the edges of 

 the pronotum and the deeply impressed midline, which diminishes in 

 depth from base to middle; except for the flat anterior angles and 

 lateral margins, which show a few shallow moderate punctures and 

 alutaceous sculpture, the entire surface is strongly and closely punc- 

 tate, the punctures very coarse in the midline, between, in, and behind 

 the lateral foveae, forward the size gradually smaller with intermixed 

 fine punctures toward the anterior margin, where all are of uniform 

 diameter. A few scattered short, erect setae show in glancing light 

 over the flattened anterior angles. 



Elytra: Together elongate oval, convex, widest slightly behind 

 middle. Humeri strongly dentate. Striae strong with deep elongate 



