no. S6i6 GENUS EUPARIXIA — WOODRUFF AND CARTWRIGHT 9 



by series of longitudinal carinae enclosing square or rectangular punc- 

 tures or pits, these rows of depressed squares on first two segments 

 not quite as long as remainder of segment at middle, but rapidly de- 

 creasing from lateral fourth to zero at extreme sides; on third segment 

 the depressed squares about as on preceding segments but occupying 

 practically all of the segment at its shortened middle length; terminal 

 segment carinae about two-thirds the segment length at middle; first 

 two segments bordered posteriorly with very close, fine punctures; 

 remaining surface of all segments with scattered fine to medium punc- 

 tures at middle; very large shallow punctures at sides. Pygidium 

 with roughened eroded area, basally separated by a longitudinal 

 carina. 



Legs: Anterior tibia sharply tridentate, middle tooth nearer the 

 basal one than to the apical one. Apical tooth broad, bent outward 

 at nearly a right angle to tibia. Apical spur elongate, narrow, gently 

 curved toward outer tibial margin, flattened, concave beneath, 

 slightly longer than combined length of first three tarsal segments. 

 Single row of about seven short setae on outer tibial margin between 

 base and basal tooth, and one seta on each side of each tooth, with 

 a few scattered setae beneath. Length ratio of tarsal segments: 

 2-1-1-1-2; claws simple. Anterior femur broad, with perimarginal 

 groove; surface with close moderate punctures bearing extremely 

 short, fine, almost invisible setae; three coarse setae on anterior 

 edge beginning at trochanter and extending one-fourth the femur 

 length. Trochanter exceptionally large, slightly longer than width 

 of femur, finely margined, surface very finely alutaceous. Middle 

 femur long, slender, slightly arcuate, complete posterior marginal 

 groove, surface with moderately close, fine punctures set with ex- 

 tremely short setae; tibia straight, very weakly gradually expanded 

 to twice basal width (fig. 9) ; terminal ventral edge excavated opposite 

 tarsus with one seta next to spur and three beyond the emargination ; 

 first tarsal segment equal to combined length of next three, terminal 

 segment slightly longer than second; claws simple. Posterior leg 

 similar to middle except that the posterior femoral groove extends 

 only half the distance from knee to base. 



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

 outline (fig. 5), but similar to E. bruneri Chapin. Aside from its 

 distribution and host ant, it can be distinguished from bruneri by 

 the less acute angle in the middle of the constricted side margin and 

 less angulate posterior of the explanate margin. It is somewhat 

 similar to E. jormica Hinton but differs by possessing impunctate 

 meso- and metasternum and in the shape of the pronotal outline. 



Specimens examined: Total 7. Holotype: Melder, Louisiana, 11 April 19G1, 

 J. C. Moser, 2 feet deep in nest of Atta texana [USNM No. 689301. Paratypes: 



256-172 — 67 2 



