386 PROCEEDINGS OF THE NATIONAL MUSEUM vol. m 



Lite; sides subparallel on about anterior half, very broadly rounded 

 behind; surface opaque; striae narrow, strongly impressed, punc- 

 tures small, shallow, closely placed ; interspaces several times as wide 

 as striae, flat anteriorly, convex on declivity, becoming narrower pos- 

 teriorly, rugose, with irregularly arranged, lunate asperities anteri- 

 orly, becoming uniseriate behind ; vestiture of small, short hairs on 

 sides and declivity. 



The male is unknown. 



Type locality. — Rio Madeira, Brazil. 



Additional locality. — Rio Beni, Bolivia. 



Host. — Unknown. 



Type material. — Holotype and 1 paratype, U. S. N. M. No. 565G3. 



The type was collected by W. M. Mann in 1933 at Rio ISIadeira, 

 Brazil ; paratype by W. M. Mann, Rio Beni, Bolivia. 



PHLOEOTRIBUS ARGENTINAE, new species 



Plate 17, Figttkes 28-30 



Female. — Piceous-black, with anterior margin of pronotum, an- 

 tennae, and parts of the legs reddish brown ; 2.63 mm. long, 1.69 times as 

 long as wide. 



Frons (fig. 30) convex above, frontal rectangle 0.92 as long as wide, 

 transversely impressed just above epistomal margin and also be- 

 tween the eyes, wuth impressions separated by a transverse, slightly 

 arcuate elevation between the bases of antennae, surface subopaque, 

 reticulate, with rather small, shallow punctures; epistomal margin 

 thickened, liplike, extended in median line. Antenna reddish brown, 

 arising from frons one-third of distance between eye and median line ; 

 scape long, slender, with a few short hairs; club nearly as long as 

 scape, with rather long, slender lamellae. Eye elliptical, 3.3 times 

 as long as wide, inner margin entire, facets moderate. 



Pronotum 1.26 times as wide as long, widest near base, posterior out- 

 line strongly bisinuate, posterior angles rounded, sides and front 

 margin evenly subsemicircularly rounded, anterior margin serrate at 

 each side, with median serrations obsolescent ; surface opaque, rugose- 

 asperate in front and at sides, median third of posterior disk subgran- 

 ulate, with large but very shallow, very indistinct, obsolescent punc- 

 tures; hairs scanty and very inconspicuous, more numerous at sides. 



Elytra wider than pronotum and 1.62 times as long, 1.18 times as 

 long as wide ; anterior margins arcuate, elevated and crenulate ; sides 

 nearly straight and feebly converging on anterior two-thirds, moder- 

 ately rounded behind; surface convex from base to apex, moderately 

 shining, piceous except near anterior margin; striae deeply impressed, 

 punctures small, indistinct; interspaces two or more times as wide 



