254 Memoirs on the Coleoptera 



apex more broadly rounded, a fourth longer than wide, only a little wider 

 than the prothorax and not quite twice as long; surface feebly rufescent at 

 the sides in the type, the grooves nearly similar, the punctures not quite so 

 coarse. Length 3.25 mm.; width 1.5 mm. Brazil (Santarem). One male 



example fluviatilis n. sp. 



Body smaller and more narrowly oval, the whitish squamules above very minute 

 and inconspicuous, large, white and separated beneath, smaller anteriorly; 

 color black, rather shining, the slender legs not paler; beak (d 1 ) nearly as in 

 the two preceding, the antennae black, rather thick, at apical third, the 

 seventh funicular joint not much dilated and with a minute tubercle on the 

 inner side; club large, oval, as long as the preceding five joints, finely, densely 

 pubescent as usual, the basal part internally deeply concave and polished 

 and bounded basally by a strong and sharply pointed tooth; prothorax 

 more than two-fifths wider than long, the basal angles somewhat rounded; 

 sides feebly converging and scarcely arcuate, rapidly and evenly rounding 

 apically; punctures rather coarse, dense, with a partial smooth median line; 

 scutellum denuded in the type; elytra oval, more than a fourth longer 

 than wide, obtusely rounded at apex and twice as long as the prothorax; 

 grooves coarse; intervals with moderate and rather close-set punctures, 

 confused basally in large part — as well as the minute squamules, in single 

 lines elsewhere. Length 2.8 mm.; width 1.25 mm. Brazil (Santarem). 

 One male glabellus n. sp. 



The female seems to be much less abundant than the male in 

 this group of the genus. 



Ladustaspis n. gen. 



In sculpture and general facies, the single species of this genus 

 resembles Odontocorynus in some respects, but differs radically in 

 nearly all structural characters; unfortunately the male seems to 

 be unknown. The body is elongate-oval, with the humeri not 

 laterally prominent but rapidly rounding to the base, the surface 

 opaque and with small sparse and hair-like squamules above, the 

 scutellum very densely squamose. Beak moderately long, very 

 smooth and polished but finely punctate and squamulose at base, 

 separated from the head by a scarcely visible depression; it is 

 flattened except gradually toward base, the mandibles short and 

 straight but rather dehiscent at apex when closed. Antennae 

 slender, submedial, with notably narrow elongate-oval club, as 

 long as the five preceding joints, the first funicular as long as the 

 next two, the second as long as the third and fourth. Prosternum 

 flat or very faintly impressed along the middle, having at apex a 

 small deep median fossa; it very narrowly separates the coxae and 

 is not bituberculate behind the latter; the legs are simple, the 

 thighs not inflated. The type may be described as follows: 



Ladustaspis flaviscutis n. sp. — Elongate-suboval, slightly ventricose, deep black 

 throughout and dull in lustre, fine white hair-like squamules widely scattered on 

 the pronotum, gradually a little closer medially and becoming broad orange 

 scales on the basal lobe and scutellum, remotely and evenly scattered over the 

 elytra but closer and subherissate at the humeri, small, sparse, even and white on 



