12 Memoirs on the Coleoptera 



the apex not tubulate; surface opaculate, indistinctly punctate; scutellum 

 transverse, concave medially, the concavity with small scales; elytra at the 

 obtusely rounded and rather prominent humeri a fourth wider than the prothorax, 

 barely twice as long, the surface obliquely bispinose near the suture just before 

 the middle and also with a strong spine just within the prominent lamellate 

 subapical umbo; striae fine but with strong separated punctures; intervals flat, 

 opaculate or concealed; legs rather long. Length (o 71 ) 6.2-6.8 mm.; width 

 3.5-3.8 mm. Brazil (Santarem), — Smith. Two examples. 



The male has a rather narrow shallow abdominal impression at 

 base; the two penultimate segments are short, the three sutures 

 very coarse, reflexed at the sides. 



Plesianones n. gen. 



In this genus the body is very small, the anterior coxae sub- 

 contiguous, the prosternum sulcate, the beak moderate, feebly 

 arcuate, with the antennas medial and rather short, the funicle slen- 

 der, with stout basal joint, the femoral spines small and aciculate 

 and the tarsal claws small, arcuate, very slender and free. The 

 type is the following: 



Plesianones angusricollis n. sp. — Ventricose, convex, nearly black, the legs 

 dark piceous; scales small, pale, in confused irregular double lines at the sides 

 of the pronotum, the inner with a feeble internal offset at the middle, the median 

 line finely squamulose; on the elytra the pale scales are sparsely disposed in 

 loose intricate design; under surface with rather strong dense punctures, each 

 having a very small slender squamule; beak a little longer than the head and 

 prothorax, shining, subglabrous; prothorax a fourth wider than long, the parallel 

 sides nearly straight, rounding anteriorly to the transverse sulcus; punctures 

 moderate, deep and dense; scutellum small, glabrous, shining and triangular in 

 form; elytra one-half wider than the prothorax, a fourth longer than wide, oval, 

 the humeri rounded, not prominent; striae strong, not definitely punctate; 

 intervals subequal, flat, finely, sparsely punctulate and rather shining, the seventh 

 and ninth carinulate; abdomen with the posterior sutures coarse, becoming fine 

 and strongly reflexed at the sides. Length ( 9 ) 2.0 mm.: width 1.25 mm. Brazil 

 (Santarem), — Smith. One example. 



Easily recognizable by the oval convex elytra and narrow, anteri- 

 orly constricted prothorax. 



Cyrionyx Faust 



The rather numerous species of this genus are very small in size 

 of body, narrowly suboval, convex and with even surface, the 

 prothorax relatively less reduced in size than usual in this tribe, the 

 humeri not very widely exposed at base and never more than feebly 

 prominent laterally. The beak is rather short, evidently arcuate 

 and generally more or less tapering, the anterior coxae contiguous 

 or very nearly and the claws small, slender and more or less close- 

 set, though never connate at base. The type was described from 



