16 Mr. C. C. Babington's Descriptions 



versall semicirculari terminata, oculis parum prominulis. 



Antennae hxeses, 11-articulatae, infra oculos insertae ; articulis 



2 primis crassioribus, elongatis ; Stio elongate, attenuate, 



obconico ; 4to brevi, transverse; 5to — lOmo crassiusculis, 



moniliformibus, terminali longissimo, acuminato. Palpi max- 



illares externi articulis 2 primis brevibus transversis ; 3tio 



longiori, obconico, ultimo maximo, elongate, fusifermi, oblique 



truncate ; p. m interni 2-articulati, articulis elongatis atte- 



nuatis, Imo cylindrice, 2de subulate. Menium lobe inter- 



medio nullo, lobis lateralibus retundatis. Palpi lahiales 



articulis 1, 2 et 3 brevibus transversis, 4to maximo, ventri- 



cese, oblique truncate vel emarginate. Scutellum inconspi- 



cuum. Tarsi omnes 5-articulati, unguiculis 2 sequalibus. 



[PL I. fig. 4 a, mandible ; 4 h, maxilla ; 4 c, labium.] 



Differs from Hydroporus by the structure of its maxillary and 



labial palpi, and by the want of a tooth in the centre of its men- 



tum. 



1, (22.) A. maculatus, Bab. (PI. 1, fig. l.) 

 Late ovatus, flavus, elytris fuscis, maculis 2 transversis apice- 

 que flavis, gresse punctato-striatis, cestatis ; subtus fuscus, 

 gresse punctatus, antennis pedibusque flavis. (L. c. | ; lat. 

 flin.) 

 Broadly ovate, yellow, flat above. Head smooth, bread, rounded 

 in front. Thorax smooth, broadly emarginate in front ; the an- 

 gles acute; sides rounded, particularly towards the front, sinuated 

 behind with a transverse impression ; disk transversely elevated, 

 and a large tubercular elevation on each side behind. Scutellum 

 wanting. Elytra broad, flat, with numerous lines of very coarse 

 punctures ; the suture slightly elevated, and an elevated costa on 

 the disk, in continuity with the tubercle on the thorax ; fuscous, 

 with the external margin, two transverse patches, and the apex, 

 yellow. Body beneath fuscous, very coarsely punctured, gibbous. 

 Legs and antennae yellow. 

 Hab. Rio de Janeiro. 



Desmopachria, Bab.* 

 Corpus subglobosum. Caput fronte antice carina semicirculari 

 terminata, oculis parum prominulis. Antennce breves, 11- 

 articulatae, infra oculos insertae, articulis 3 basalibus elongatis, 

 Imo obconico, 2de elliptice crassissimo, 3tie attenuate cla- 

 vato, 4te minimo transverse, 5to paululum quarto majori 



* Derivatio nominis, Ssa-jUo? catena, ma.yy^ crassus, oxfov apex. 



