PHLCOTRIBUS. 163 
9. Alternate interstices of the elytra strongly spinose towards apex, its 
margin acutely serrate . . . . . . ee ew we ee) «Mt, SP. N. 
Elytra finely and uniformly tuberculate towards apex, its margin subserrate setulosus, Hichh. 
10. Base of the prothorax distinctly produced behind . . . . . . . . = subovatus, sp. n. 
Base of the prothorax truncate . . . . . . . . . . . ~ . . Sodalis, sp. n. 
1. Phleotribus discrepans, sp. n. 
Oblongus, subcylindricus, subopacus, breviter setosus, piceo-niger, pedibus rufescentibus; antennarum clava 
ovali, articulis breviter productis composita; prothorace subtransverso, anterius equaliter angustato, 
reticulato-punctato ; elytris striato-punctatis, interstitiis confertim rugosis biseriatim breviter setosis. 
Long. 2°2 millim. 
Oblong, subcylindrical, rather dull; head and prothorax black, the elytra piceous. Head closely shagreened, 
the front subconvex, with scanty light pubescence, the mouth ciliate ; antenne short, testaceous-brown, 
the club black, transversely acuminate-oval when closed, the first two joints semi-crescentic and tapering 
from the base. Prothorax a little broader than long, with the sides narrowed from the base and slightly 
rounded, the apex separately and obtusely rounded ; hind angles nearly rectangular, basal margin trans- 
verse, bisinuate ; surface with thin short pubescence, very finely and closely reticulate and obscurely 
punctured, the median line obsoletely elevate. Scutellum small, rounded. Elytra twice as long as the 
prothorax and a little wider, with the basal margins rounded and finely serrate, slightly narrowed towards 
the apex, the hind margin subarcuately rounded ; surface cylindrical to hinder third, thence convex and 
obliquely declivous, irregularly striate-punctate, the punctures close, the stric very faintly impressed ; 
interstices throughout with very close transverse wrinkles and irregular double rows of close, short, erect 
sete. Underside piceous, thinly pubescent; the anterior coxe rather narrowly separated. Legs piceous- 
red, the tibiw rather broadly dilated, with the teeth nearly obsolete. 
Hab. Panama, Volcan de Chiriqui (Champion). 
In appearance this insect, of which but one example was taken, most closely 
resembles Phrizosoma rude, from which it is best distinguished by the structure of 
the antennal club and the indistinct thoracic indentation. It would be better to 
separate it entirely from PAlwotribus, but the one example, which cannot be dissected, 
affords no special characters on which to do so. The form is more elongate and 
cylindrical than in any other member of the genus, and approximates to that of the 
species of Polygraphus. 
2. Phleotribus nubilus, sp. n. 
Oblongus, opacus, rufo-piceus, pube fusca vestitus; antennarum clava breviter lamellata ; prothorace subtrans- 
verso, supra subtiliter punctato et ad latera granulato; elytris punctato-striatis, interstitiis planis, pilosis, 
uniseriatim setosis, ad basin granulatis. 
Mas. Fronte impressa. 
Long. 2°4-2°7 millim. 
Oblong, dull reddish-piceous, with short fuscous-brown pubescence. Head blackish, finely reticulate, front 
shortly pubescent, impressed in the male; antenne piceous-red, the club black, oval when closed, with 
oblique sutures, the two basal joints semicrescentic. Prothorax a little broader than long, semielliptic, 
its hind angles rectangular, the sides and apex rounded, piceous-red, weakly impressed on either side 
behind the middle, with short scanty pubescence, finely and closely punctured, granulate towards the 
sides and apex, more strongly in the male. Elytra wider at base than the prothorax and one-half longer, 
their basal margins rather strongly elevated and rounded, the sides subparallel, the apex subobliquely 
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