482 PROCEEDINGS OF THE NATIONAL MUSEUM vol. in 



seven to ten setigerous punctures; transverse impression weak to 

 obsolete, marked by medially interrupted, somewhat irregular row of 

 large punctures; anterior lobe with few scattered punctures behind 

 subapical line, along midhne and laterally; posterior lobe with punc- 

 tation dense mediall}^ and becoming sparser laterally. 



Scutellum : Length less than width, 1.97(1.69-2.21): 2.04(1. 75-2.28); 

 disc weakly alutaceous, with numerous punctures except at base. 



Hemelytron: Clavus and corium finely alutaceous; clavus with 

 double row of small punctures; mesocorium with two more or less 

 equally developed rows of distinct punctures paralleling claval suture, 

 rest of area obsoletely punctured except in basal third and in outer 

 apical angle; exocorium with punctures scattered for full length; 

 costa with two to five setigerous punctures; membranal suture nearly 

 straight, lateral angle slightly prolonged ; membrane longer than basal 

 width, distinctly surpassing apex of abdomen. 



Propleuron: Alutaceous, punctate in depression and anterior to 

 acetabulum; prostcrnal carinae less than half as high as labial II. 



Mesopleuron: Lateral area impunctate. 



Metapleuron: Lateral margin of cvaporatorium weakly concave; 

 lateral area impunctate. 



Legs: Posterior tibia with spines of postero ventral margin longer, 

 more slender and tapering than those of dorsal margins (fig. 159); 

 tibiae bicolored, basal half or more (especially of posterior pah-) pale 

 yellow, contrasting distinctly with the mostly reddish brown femora. 



Sternites: Alutaceous; impunctate. 



Terminalia: Genital capsule alutaceous, very sparsely, finely punc- 

 tured medially, apical margin entire, straight in posterior view; 

 gonostylus as illustrated (fig. 236b). 



Length of body: 5.54(4.74-6.18). 



Type data. — Signoret's xanthopus was based on a specimen from 

 "Bresil" in the "Berlin Museum." 



Specimens studied: 



Bolivia: Province of Sara, Santa Cruz de la Sierra (450 meters), Tiguipa; 

 April, November, December. 



Brazil: Bahia, Ceara, Joazeiro, Matto Grosso, Parnagud, Serrinha (Parand) ; 

 October to December. 



Paraguay: Horqueta, Villarrica; November to February. 



Argentina: Buenos Aires, Marull, Patquia, Tucumdn; January. 



Discussion. — This is the only member of the genus that fits 

 Signoret's description "les pattes d'un jaune pale, avec les poils et 

 epines noirs." The type repository as given by Signoret was "Berlin 

 Museum" and undoubtedly referred to what is now the Zoologisches 

 Museum der Humboldt-Universitat, in East Berlin. However, 

 personal examination of that collection and the one at the Deutsches 



