BAKYBAS. 151 



Distinguished from other described species by the peculiar shape of the clypeus in 

 both sexes*. 



2. Barybas idiota. 



Oblongus, crassus, fuscus, aspere subrugose (thorace grossing, elytris subtilius) punctatus, squamis anguste lanceo- 



latis cinereis vel fulvo-ochraceis vestitus, squamis adpressis interdum (prsecipue apud pygidium) elevatis ; 



clypeo brevissimo, cum genis rotundato ; thorace valde et sequaliter convexo, lateribus late rotundatis (inar- 



gine serrato), angulis posticis subrectis ; elytris umbone callisque mediocribus ; pygidio annulato-punctato. 



c? . Tibise anticse bidentatse ; tarsi articulo basali apice intus spina brevi : pygidio lateribus postice sulcatis. 



2 . Tibia? anticse subtridentatse (dente superiore lato parvo) ; tarsi inermes ; pygidio latiore brevioreque, simplice. 



Long. 8-9 millim. 



Bob. Nicaragua, Chontales (Belt, Janson). — South America, Upper Amazons. 



The clypeus, together with the gense, is broadly rounded ; it is reflexed and separated 

 from the forehead by a distinct suture, forming a border to the head of equal width 

 throughout. 



Two examples only, both males, from Chontales. I have supplemented the descrip- 

 tion from females taken on the Amazons. In some examples, especially in those from 

 the Upper Amazons, the scales are elevated, nearly vertically so on the thorax and 

 pygidium, and congested in small spots on the elytra ; but in others from the same 

 localities they lie perfectly flat. 



3. Barybas oxygenys. 



Oblongus, convexus, fuscus, aspere punctulatus, squamis lanceolatis recumbentibus fulvis vestitus, elytris spatiis 

 glabris ; clypeo rotundato, genis acutis ; tborace sequaliter convexo, lateribus rotundatis (margine integro), 

 angulis posticis obtusis sed distinctis ; antennis rufis ; pedibus rufescentibus ; tibiis anticis <S $ tridentatis. 

 S . Tarsi antici articulo basali apice intus breviter spinoso. • 

 5 . Tarsi antici articulo basali apice intus simplice. 

 Long. 6 millim. 



Eab. Panama, Bugaba (Champion). Two examples only. 



The clypeus is reflexed, and forms an anterior border to the head, which is much 

 wider in the middle than at the sides. The gense project in an acute angle close to 

 the eyes. 



* The following species has the same feature, but somewhat less developed : — 



Barybas sublobatus. 



Oblongus, castaneo-fuscus, squamulis (sive pilis) brevibus cinereis interrupte vestitus ; clypeo brevi, antice late 

 truncato obtusangulato, utrinque pone angulum leviter sinuato genisque late sublobatis ; thorace sequaliter 

 convexo, lateribus rotundatis, angulis posticis fere rectis, umbilicato-punctato ; elytris umbone mediocri, 

 callis apicalibus squamis fasciculatis, crebrius subtiliter punctato-strigulosis ; pygidio creberrime umbili- 

 cato-punctulato ; antennis pedibusque rufescentibus ; tibiis anticis S $ tridentatis. <$ . Tarsi anteriores 

 articulo basali apice intus recte spinoso ; pygidio sequaliter convexo. $ . Tarsi anteriores inermes ; pygidio 

 planato, prope apicem medio tuberculis conicis approximatis duobus. 



Long. 6-9 millim. 



Hab. Amazons, Ega (coll. Bates). 



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