394 Memoirs on the Coleoptera 



not occurring near the Pacific coast-line. The body is smaller and 

 much more abbreviated than in Madams, usually with distinctly 

 cuneiform outline, with glabrous, smooth and polished integuments 

 and strongly undulated elytra. The femora are denticulate be- 

 neath, though never as strongly as in Hulpesellus, and it is some- 

 times a partially obsolete character as in Linomadarus. I have been 

 unable to note the entire absence of the tooth on the anterior 

 femora, however. The beak is cylindric, arcuate and varies in 

 length from rather short, as in sortitus, to notably long, as in oblon- 

 gulus, separated by a very feeble wide impression and with the 

 mandibles prominent when closed and denticulate within. The 

 antennae are somewhat as in Hulpesellus, submedial and with rather 

 narrower but well developed club. The prosternum separates the 

 coxae by about twice their width as a rule, and is fiat, often as in 

 sortitus with two small apical foveae, each continued posteriorly by 

 an inwardly oblique impressed line to a point midway between the 

 coxae, the intermediate surface with a small medial tumidity. The 

 nine species now considered are the following: 



Tooth of the anterior femora quadrate, oblique and broadly truncate; body very 

 smooth, deep black throughout and anteriorly inflated 2 



Tooth triangular; body not, or much less, inflated anteriorly, the surface not 

 maculate, except feebly in seriatus; thoracic surface normally convex antero- 

 laterally 5 



Tooth parallel-sided, oblique, rounded at tip; body cuneiform, the elytra with a 

 transverse red fascia 10 



2 — Elytral striae obsolete and consisting of series of moderate punctures, except 

 at the sides and apex, where they are fine and smooth 3 



Elytral striae in the form of narrow and sharply defined, deep, impunctate grooves 

 throughout the width, but coarser and feebly crenulate laterally 4 



3 — Body broad and rapidly cuneiform, convex, polished, black and smooth above, 

 in great part very coarsely, deeply punctate beneath, less strongly and in 

 part rugulose on the inferior thoracic flanks; beak rather thick, cylindric, 

 finely, loosely punctate, as long as the head and prothorax (o 71 ), slightly 

 less thick and as long as the prothorax ( 9 ), the smooth blackish antennae 

 behind the middle; prothorax fully two-fifths wider than long, the sides 

 parallel and feebly arcuate, very rapidly and abruptly, transversely conver- 

 gent at apex to the tubulation, which is much less than half as wide as the 

 base; surface strongly convex as seen in profile, smooth, finely, sparsely 

 rugulose at the sides and, anteriorly, asperate at the abrupt narrowing, the 

 surface antero-laterally concave and smooth.; basal lobe broad and evenly 

 arcuate as usual, the scutellum triangular; elytra scarcely a fifth longer 

 than wide, not as wide as the prothorax and less than one-half longer, para- 

 bolic, with moderately tumid humeri and distinct subapical umbones; 

 pygidium small, vertical, feebly convex, evenly rounded beneath and much 

 wider than long; abdomen nearly smooth, the basal segment rather strongly, 

 sparsely punctate; sexual differences very feebly marked. Length 3.8-4.3 

 mm.; width 2.0-2.3 mm. Brazil (Santarem). Four specimens. 



truncatidens n. sp. 



