CYDNIDAE OF THE WESTERN HEMISPHERE FROESCHNER 567 



Metapleuron (fig. Ill): Evaporatorium occupying almost mesal 

 half of segment, lateral margin well defined, deeply concave. 



Sternites: Shining, very weakly ahitaceoiis, weakly and finely 

 rugose and punctured laterally. 



Terminalia: Genital segment marginally carinate and slightlj^ 

 expanded; gonostylus as illustrated (fig. 256). 



Length of body: 5.14. 



Female: Generally similar to male but lacking constriction of 

 pronotal side margins and the extra pronotal setigerous puncture in 

 the posterior angle mesad of the submarginal row; measurements (in 

 the single female studied) slightly smaller than those of male. 



Head: Width-length ratio, 1.43:0.96; interocular width, 1.00. 

 Antennal segments: I, 0.33; II, 0.26; III, 0.28; IV and V missing. 

 Labial segments: I, 0.56; II, 0.64; III, 0.53; IV, 0.43. 



Pronotum: Width-length ratio, 3.26:1.43. 



Scutellum: Width-length ratio, 2.08: 1.69. 



Length of body: 5.00. 



Type data: Mulsant and Rey originally gave their type locality 

 as "Montpellier," France, but Signoret (1881b, p. 428) later pointed 

 out their misinterpretation of his label "Mont.," which he said stood 

 for Montevideo in Uruguay. Berg gave the type locality for constridus 

 as Provincia Bonaerensis, Argentina. The author has been unsuc- 

 cessful in locating the type of signoreti but has learned that Berg's 

 type is in the Universidad Nacional de La Plata, Buenos Aires. 



Specimens studied: 1 male, 1 female. 



Paraguay: San Bernardino, Fiebrig, 1 male, 1 female (Wien). 



Discussion. — See discussion under the genus. 



Tominotus unisetosiis, new species 



Plate figure 257 



Diagnosis. — Among its congeners with the uninterrupted 

 mesoplem-al evaporatorium, this species may be recognized by the 

 single setigerous puncture on the costa. 



Description. — Male: Elongate, subparaUel. 



Head: Width one-half greater than length, 1.26(1.16-1.36) :0.87 

 (0.86-0.90); interocular width, 0.80(0.80-0.83); juga semicircular, 

 converging but not contiguous beyond apex of clypeus; latter with 

 two setigerous punctures subapically ; juga with submarginal punctures 

 giving rise to peglike setae anteriorly and long slender setae basally; 

 surface faintly to distinctly rugose radially, with numerous rounded, 

 wade, shallow punctures; vertex with punctures minute or absent; 

 ocelli well developed, removed from eye by more than ocellar v\^idth; 

 jugum ventrally polished, impunctate; maxillary plate with few punc- 



