Brazilian Barin/e 399 



Linomadarus n. gen. 



The type of this proposed genus is the Madams vorticosus of 

 Boheman, inhabiting the Central American region; it is a large 

 group, including many South American species, all of which are much 

 more glabrous than vorticosus. The body is smaller, narrower and 

 more convex than in the preceding, subcuneate or elongate-oval in 

 outline and apparently with very feebly marked sexual differences. 

 The beak is moderate in length, evenly but moderately arcuate, 

 separated from the head by a very feeble impression and with the 

 mandibles somewhat as in the preceding, being strongly and very 

 widely bifid; it is fully as long in the female as in the male, but, in 

 the former sex, is abruptly narrowed, smooth and cylindric beyond 

 the antennae as a rule. The antennas are medial (o 71 ) or distinctly 

 post-medial ( 9 ), the first funicular joint as long as the next three, 

 the second but little longer than wide, the club rather small, oval 

 and pointed. The prosternum is almost as in the preceding genus 

 throughout, the coxae separated by about three times their width. 

 The prothorax is briefly and feebly to strongly and abruptly tubu- 

 late at apex, equally in the sexes, the well developed basal lobe 

 evenly rounded, the scutellum moderately transverse and lunate, 

 angulate behind, and the elytra may be abruptly but smoothly and 

 finely grooved or with fine or obsolete striae, marked by series of 

 fine punctures, somewhat as in Madarellus; but here, the surface is 

 not or only very feebly undulated. The pygidium is small, vertical, 

 evenly rounded, nearly flat and densely punctate. The anterior 

 legs are longer in the male, with the tarsi broader and the femora 

 may be minutely denticulate beneath or unarmed. The South 

 American species at hand are the following: 



Third strial interval with a short basal line of dense and usually whitish decum- 

 bent squamules 2 



Third interval with a small spot of dense squamules, at about basal fourth 9 



Third interval and entire integument above and beneath completely glabrous.. 10 

 2 — Basal lines of squamules longitudinal and not quite attaining the basal margin 



so far as noted 3 



Basal lines oblique and attaining the basal margin; striae fine but abruptly 



grooved, impunctate; beak longer and thinner 8 



3 — Striae very fine and subobsolete, finely punctulate 4 



Striae fine but deep and abruptly grooved, impunctate; body slightly though appre- 

 ciably less elongate 7 



4 — First ventral suture deep and very distinct; femora long and slender, mutic, 



the intermediate with a very feeble angulate tooth beneath 5 



First ventral suture very fine, feeble and subobsolete 6 



5 — Body elongate, suboval, convex, polished and deep black throughout; beak 

 ( 9 ) as long as the head and prothorax, evenly arcuate, smooth and cylindric, 

 rapidly thickened and distinctly punctate in barely more than basal two- 

 fifths, the antennae at two-fifths, black; prothorax subquadrate, a fifth or 

 sixth wider than long, the parallel sides scarcely arcuate, gradually rounding 



