502 PROCEEDINGS OF THE NATIONAL MUSEUM vol. m 



duced; membrane longer than basal width, slightly surpassing apex of 

 abdomen. 



Propleuron: Faintly alutaceous, with few punctures in depression; 

 prosternal carinae less than half as high as labial II. 



Mesopleuron: Evaporatorium reaching into posterolateral angle but 

 not quite reaching lateral margin of segment; lateral area impunctate. 



Metapleuron: Lateral margin of evaporatorium straight; lateral 

 area impunctate. 



Legs: Not especially modified, with five spines on posteroventral 

 margin. 



Sternites: Polished, impunctate. 



Length of body: 5.82(5.67-5.97). 



Type data.— Holotype female (USNM 64424), "Corumba, Matto 

 Grosso Brazil." Paratype: Vilcanota, Peru, H. G. Barber Collection, 

 1 female (USNM). 



Discussion. — The impunctate head with four submarginal setiger- 

 ous punctures on each side, the reduced punctation of the scutellum 

 and coria and the failure of the mesopleural evaporatorium to reach 

 all the way to the lateral margin of the segment suggests that this 

 species is very close to the lone male on which the new species punc- 

 tinotum is based, and perhaps may even be the female of that species. 

 However, the pronotal punctation and sculpturing of the two forms 

 plus the presence of but a single costal setigerous puncture in rugono- 

 tum is of sufficient worth to separate the two forms until biological 

 evidence is available to indicate their sameness. 



Pangaeus {Pangaeus) semibrunneus, new species 



Plate figure 23Ga 



Diagnosis. — The presence of a complete, submarginal row of setig- 

 erous punctures on each jugum plus the abundant moderate-sized but 

 distinct punctures on the mesocorimn will permit placement of this 

 form within the subgenus. 



Description. — Color: Head, thorax, and appendages light brown; 

 hemelytra, scutellum, and abdomen dark browTi to piceous. 



Male (from two specimens) : Oval to subparallel. 



Head: Length greater than width, 1.04(1.04-1.04) : L38( 1.36-1. 40); 

 interocular width, 0.85(0.84-0.86); anterior outline broadly rounded, 

 slightly truncated apically, clypeus almost as long as juga, distinctly 

 narrowed apically; surface distinctly convex, shining, impunctate; 

 juga with coarse, transverse rugae; ocelli distinct, separated from eye 

 by less than twice ocellar width; jugum ventrally and maxillary plate 

 polished, impunctate. Antennal segments: I, 0.30(0.30-0.30); II, 



