IIEXRIORRHYNCHUS. 57 



Metriorrhynchus ater. 



(Plate XIV. fig. 7.) 



Ater, opacus ; thorace trapezoidali, nitido, septemareolato ; elytris 

 quadricostatis, interstitiis biseriatim crebre punctato-striatis, seric- 

 biis linea tenui divisis. d , 2 • Long. 8^ liu. 



Hah. Dorey, New Guinea, and Am I. {Wallace). 



Dull black, or sometimes tinged with fuscous. The thorax has 

 the sides nearly straight, the anterior margin somewhat rugulose, 

 the rest of the surface is shining. The costee of the elytra are all 

 distinct at the base (the second and fourth rather stronger than the 

 others), but posteriorly the intermediate ones are merely very fine 

 lines dividiug the rows of punctures, and sometimes are scarcely 

 perceptible. 



The two examples in the British-Museum collection from Aru I. 



have the thorax less trapezoidal — that is, the sides are less straight, 

 and the fore part is more rounded. These may prove to be a distinct 

 species. One of them measures 5 lines in length. 



Metriorrhynchus angustulus. 



(Plate XIV. fig. 5.) 



' Elongatus, parallelus, angustus, piceo-niger, opacus ; thoracis 

 lateribus, pectore, femorum tibiarumqne basi flavis ; elytris quadri- 

 costatis, interstitiis biseriatim crebre obsolete punctato-striatis, 

 plaga triangulari scutellari picea ; abdomine piceo. Long. 3 lin. 



Hah. Dorey, New Guinea {Wallace). 



Thorax transversely quadrate, the anterior margin arcuate, the 

 sides straight ; above with seven areolets, the discoidal one extending 

 from the base to the anterior margin. The costse on the elytra are 

 fine ; the interstices each with a double series of obsolete punctures, 

 the series confused in the middle of the elytra ; fine intermediate 

 costse may be traced at the extreme base. 



Metriorrhynchus puncticoUis. 

 (Plate XIV. fig. 3.) 



Depressus, parallelus, fnscus, opacus ; thorace marginibus anticis 

 et lateralibus crebre ruguloso-punctatis, flavo-fuscis ; elytris paral- 

 lelis, crebre evideuter punctato-striatis, interstitiis angustis, sub- 

 aequalibus. c? , ? • Long. 4 lin. 



Hah. Dorey, New Guinea ( Wallace). 



Thorax with seven areolets, the anterior ones not very distinctly 

 divided ; the anterior border slightly angular ; the four anterior 

 areolets thickly and rugosely punctured, somewhat inclined to dusky 

 yellow ; the lateral margins also rugosely punctured. Elytra each 



