18 MONOPLATUS. 



elytris subtilissime striato-punctatis, fusco suffusis ; antennisfili- 

 formibus, rufis, ad apicem fusco-rufis ; pedibus flavo-rufis. 

 cJ Long. corp. 3 lin., lat. 1| lin. 



Oblong-ovate, snbparallel, subdepressed, impubescent, glabrous, 

 flavo-rufous, suffused with fuscous. Head short, transverse, hardly 

 produced in front ; the eyes large, globular, black, extending laterally 

 nearly as far as the anterior angles of the thorax ; between the eyes 

 is a minute and directly transverse fovea, which when viewed under 

 a high power is medially subsinuate (not distinctly angulated, as in 

 M. semichalybeus ; or semicircular, as in M. semiviolaceus} ; surface 

 impunctate, flavo-rufous, obsoletely suffused with fuscous ; glabrous. 

 Thorax transverse, rectangular, anteriorly slightly emarginate, the 

 anterior angles subacute, and slightly depressed ; the sides margin- 

 ate ; at the base is a transverse thread-like fovea, which is deflected 

 at right angles (before it reaches the humeral angle) to the base ; sur- 

 face impunctate. Scutellum triangular, impunctate, glabrous. Elytra 

 parallel, subdepressed, rounded at the apex, impunctate, except under 

 a high power, when rows of minute punctures may be discerned, 

 arranged in the form of striae ; these striae -like punctures are much 

 more minute than in M. semichalybeus, and more distinct at the base 

 than in M. semiviolaceus ; the colour is dark-fuscous, suffused irre- 

 gularly throughout, and especially near the base, with flavous. An- 

 tennce filiform, rufous, at the apex fusco-rufous. Legs flavo-rufous 

 throughout. 



Brazil. In the collection of M. Chevrolat. 



From M. semichalybeus this species is separated by its minute 

 punctures on the elytra, and from M. semiviolaceus by its larger 

 size, more elongated form, and its different markings on the head ; it 

 differs, in addition, from all the species which approach it by the 

 irregularly clouded flavo-fuscous colouring of its elytra : it may be 

 a question, whether this latter, if alone, would be a permanent specific 

 character, or whether it is only the accidental variation of a single 

 individual. 



15. Monoplatus nigrimamis. 



M. oblongo-ovatus, subparallelus, subdepressus, rufo-flavus, glaber ; 

 capite brevi, impunctato, laevi, haud foveolato; thorace transverse, 

 rectangulari, ad basin transverse foveolato ; elytris subtiliter 

 striato-punctatis, rufo-flavis, ad apicem fuscis ; antennis fuscis, 

 art. basalibus rufis ; pedibus rufis, tarsis anterioribus fusco suf- 

 fusis. 

 c? Long. corp. 2^ lin., lat. 1|- lin. 



Oblong-ovate, subparallel, subdepressed, rufo-flavous, glabrous. 



