METRIORRHTNCHUS. 53 



seven areolets, broad trapeziform. Elytra with the interstices very 

 silky, with closely set transverse costa3 ; the spaces between these 

 costae rather less than the thickness of the transverse costae them- 

 selves. 



The male example has the sculpture much obscured by the fine 

 silky pubescence, which makes them appear more roughly punctured. 



Metriorrhynchus sericeus, var. 



This differs from the foregoing in having the thorax ochraceous, 

 the elytra yellow, with the extreme apex fuscous ; the apex, too, is 

 more obtuse. 



Hah. India (from Children's coll.). 



It is probable that this may prove to be a distinct species. 



Metriorrhynchus sericans. 



(Plate XIII. fig. 7.) . 



Fusco-niger ; thorace, scutello elytrisque rufo-ochraceis. (5" . 



Long. 7 lin. 

 Hub. India (J. C. Bowring, Esq.). 



This species closely resembles 31. sericeus, but is less parallel ; 

 the colour of the upper surface is of a deeper reddish ochraceous ; 

 the scutellum is comparatively slightly notched at the apex, and the 

 elytra are less obtusely rounded at the apex. 



Metriorrhynchus immersus. 

 (Plate XIII. fig. 1.) 



Elongatus, ater, supra opacus ; thorace nigro-cyaneo, areola dis- 

 coidali latissima ; elytris basi flavis. d" > 5 • Long. 4|-7| lin. 



Hab. Aru I. and Doi'ey ( Wallace). 



Very close to M. epJiijojnger, Guerin, but appears to be distinct. 

 The basal third only of the elytra is yeUow, and the line of demar- 

 cation is very sharply defined and nearly straight. The thorax is 

 more distinctly blue-black, and the mesial areolet is very broad at 

 the anterior third, at which part it occupies one third the width of 

 the thorax. The elytra have each the same eight costae, the inter- 

 mediate ones being scarcely raised ; the punctures in the interstices 

 are sometimes round, and in the broader females they are close and 

 strongly transverse. 



The male example is much smaller than the female, and has the 

 scutellum yellow. 



The specimen in the Museum collection which has been deter- 

 mined to be 31. ephippiyer, Gruerin (Voy. Coquille, p. 73), is from 

 Dorey ; it is a male, and measures 6| lines in length. 



There is another specimen from Waigiou, a female, which differs 



