Brazilian Baring 435 



33— Body rather large, parallel, polished, glabrous and very feebly sculptured; 

 scutellum small, flat, subcordate and rather closely fitted; propygidium ( 9 ) 

 very large, carinulate, the pygidium large, rounded, vertical, strongly convex 

 and shining; prosternal canal very deep, parallel and sharply defined, 

 extending between the coxa;; anterior tibiae with a large and obtusely tri- 

 angular lamellate tooth beneath beyond the middle, this probably being 

 non-sexual; tarsi moderate, not dilated; antennae long, slender, with notably 

 long first funicular joint, the club narrowly oval and gradually formed; 

 mandibles internally dentate, perhaps not decussate. [Type A. caudahs 



i Attangus 



nov. J & . 



34 _Form elongate-suboval, polished, glabrous and very feebly sculptured; beak 

 moderately thick and elongate, feebly impressed along the sides basally; 

 antennae moderately long, with small and usually conoidal club; presternum 

 feebly canalate, not tuberculate in the male, the coxae narrowly separated; 

 prothorax tubulate at apex, not conical; scutellum free, subquadrate; elytra 

 with very fine, almost obsolete striae and with strong subapical umbones, 

 and also conspicuous uneven apical impression; legs moderately long, simple. 

 [Type A. bonvouloiri Kirsch] Anopsilus 



Form elongate, rhomboidal, the other characters almost as in the preceding, 

 except that the prothorax is evenly conical and not definitely tubulate at 

 apex, the prosternum with two triangular tubercles in the male. [Type 

 Baridius conicollis Boh.] Balbus 



Balbus Pasc, was held to be synonymous with Anopsilus by 

 Champion; it is indeed very closely allied, but there are a few 

 rather important differences. The type of Attangus may be a 

 previously described species, but I have been unable to identify it. 

 The extensive genus Heterosternus is one of the neotropical repre- 

 , sentatives of the neosubarctic Pseudobaris and was also suppressed 

 by Mr. Champion, but in my opinion it is amply valid. 



Castenus n. gen. 



This is a very remarkable genus which would apparently be out 

 of place in any scheme of classification that could be devised, and 

 I therefore place it at the head of the Barini, because of the typically 

 Centrinaspid mandibles, coupled with a very large vertical male 

 pygidium, this being smaller but still unusually large in the female. 

 The body is elongate and parallel, convex, glabrous, polished and 

 very feebly sculptured. The beak is moderate in length, feebly 

 tapering, very coarsely and longitudinally sculptured and separated 

 by a feeble impression. Antennae near four-sevenths in both sexes, 

 moderate, somewhat slender, the first funicular joint as long as the 

 next two, the second as long as the succeeding two, the outer 

 joints not much enlarged, the club small, oblong, very rapidly 

 pointed, with its basal segment fully two-thirds the mass. The 

 anterior coxa; are separated by barely half their width, the inter- 

 coxal suture deep and conspicuous, the posterior sternal lobe sub- 

 parallel and prominent, extending not quite to the mesocoxal 

 tangent, and with its apex deeply, triangularly emarginate, the legs 



