Brazilian Baring 95 



convex, all of which features also ally the Ccelonertini to the Coleo- . 

 merini, although the habitus of the body is so very different. The 

 sexual characters seem to be extremely feeble. The general appear- 

 ance of the first two of the above genera is almost identical, the 

 chief external difference being the fasciiform arrangement of the 

 elytral squamules in Iotomia, and the absence of this feature in 

 Tsianina. 



The Mexican genera Cnagius, Coluthus and Coleomeropsis, of 

 Champion, also belong to this tribe, without much doubt. 



Tsianina n. gen. 



The fundamental distinctive character of this genus is the large 

 and almost solid, somewhat asymmetric, antennal club, with almost 

 obsolete and oblique sutures and short basal segments, in which it 

 differs greatly from Coelonertus and Anthenius but is rather close to 

 Iotomia. The beak is, however, less slender in the present genus, 

 and is sometimes notably thick, although the body, on the whole, 

 is remarkably similar in outline and sculpture. The two species 

 in my collection may be described as follows: 



Beak very thick and glabrous, obliquely bent downward distally; femora stouter, 

 oval. Body elongate-suboval, rather shining, deep black throughout, the 

 pronotum sparsely hispid with short dark setae, the elytra with a few stout 

 whitish hairs on the first interval behind the scutellum, the seta? of the 

 other intervals dark brown throughout and in single line; under surface 

 and legs having uniform sparse hair-like squamules throughout; beak not 

 quite as long as the prothorax, moderately and loosely punctured at the 

 sides, more finely but rather closely above; eyes large, separated by three- 

 fourths the rostral width, the interspace feebly impressed, the entire head 

 strongly, closely punctate; prothorax nearly as long as wide, the sides 

 broadly rounded, becoming gradually subparallel in about basal half, the 

 feebly constricted truncate apex half as wide as the base, the lobe feeble, 

 angularly emarginate; punctures very coarse, deep and almost contiguous, 

 a narrow smooth partial median line evident; scutellum quadrate, smooth 

 and impressed behind, punctulate and flat basally; elytra nearly a fourth 

 longer than wide, almost a fourth wider than the prothorax and one-half 

 longer, very obtusely subparabolic, with barely at all prominent humeri; 

 grooves coarse, deep and punctulate; intervals flat, with single series of 

 rather strong and close punctures; hind body beneath coarsely, densely, 

 the abdomen more finely and loosely, punctate. Length 3.8 mm.; width 



1.6 mm. Brazil (Santarem). One specimen spissirostris n. sp. 



Beak only moderately thick, more opaque and squamulo-setulose, not abruptly 

 oblique downward at apex; femora narrower, not quite twice as wide as the 

 tibiae. Body as in the preceding in form and color, but with shorter pro- 

 thorax and still more broadly obtuse elytral apex, slightly shining; setiform 

 squamules shorter, inconspicuously bristling on the pronotum, very small, 

 dark brown and unilineate on the elytra, coarser and white on the first 

 interval basally and with a few widely scattered near the middle of the 

 length; under surface as in the preceding; beak (9) longer, thicker and 

 less arcuate, as long as the prothorax, or (cf) less thick, strongly, evenly 



