Brazilian Baring hi 



it becomes necessary to announce Linogerceus as a synonym of that 

 genus. Gerceus trivittatus Chmp., which I associated with lineellus 

 and others to form Linogerceus, is, however, truly the type of a 

 distinct and rather isolated genus, it having long straight and 

 closely connate tarsal claws, as in the similarly aberrant Acentrinops, 

 so that it becomes necessary to propose a distinct generic name for 

 it as follows : 



Crotanius n. gen. — Body rhomboid-oval, closely sculptured and with dense 

 orange scales, forming three pronotal vittse and, on the elytra, one involving the 

 first, and another most of the sixth and seventh, intervals, on each; under surface 

 and legs, with separated white scales, becoming dense and orange on the met- 

 episterna and anterior parts of the prosternum; beak rather long and arcuate, 

 the mandibles prominent when closed, with straight inner and sinuate outer 

 edges and acute apices; antennae medial, with moderate oval club, the first two 

 funicular joints greatly elongated; prosternum scarcely impressed and with a 

 very small acute tubercle before each coxa in the male, the coxae rather narrowly 

 separated; legs somewhat slender, simple, the tarsal claws long and connate; 

 thoracic lobe with slightly upturned edge, the scutellum subquadrate, nude, 

 wider at the sinuate apex than at base, with acute angles and impressed surface; 

 striae strong and deep, the intervals confusedly punctate. Type Gerceus trivittatus 

 Chmp. Central America. 



In the above table of Brazilian genera Crotanius comes in the 

 first or Diastethus section, where, as can readily be imagined by its 

 general habitus and ornamentation, it is completely inharmonious, 

 as is also the Texan genus Acentrinops , which also has to be similarly 

 assigned, because of its long and closely connate ungues. 



Some of the North American genera, besides those mentioned, 

 which should be included in this tribal group and which are repre- 

 sented in my material, are Pachygerceus, Pycnogerceus, Parageraeus 

 (new name for Gerceopsis Csy., preoccupied by Gerceopsis Chmp.), 

 Stereo gerceus, Conocentrinus , Pachybaris, Leptocorynus, P send o gerceus, 

 Pseudocentrinus, Glypto gerceus, Zygobaris, Zygobarella, Neocratus, 

 Stethobaris, Idiostethus, Lasiobaris , Catapastus, and related genera. 

 The ancient forms clustering about Eisonyx, should either enter 

 this tribe or a special tribal group, this remark applying as well to 

 the very aberrant Zaglyptus, of LeConte; Eunyssobia and Plocamus 

 might also be considered members of this tribe. There are easily, 

 in fact, some one hundred and fifty genera of Centrinini in North 

 and South America, and the vast majority of these genera are in 

 no way "opinionative." 



Stegotidius n. gen. 



In this genus the mandibles, though straight, are rather short 

 and their inner margins are very slightly uneven, the beak not 

 very slender, strongly, evenly arcuate and coarsely though not 

 densely sculptured in both sexes, and separated from the head by 

 a moderate transverse impression, the antennae rather short, with 



