500 MK. GILBEET J. AREOW ON COLEOPTERA 



four joints of the antennse are yellow, and the legs are entirely pale. The head and 

 pronotum are brilliant golden-green and the remainder of the body is clothed with 

 yellow pubescence. 



Leucitus augyreus. 



Leucitus argyreus Fauv. Ann. Mus. Civ. Geuova, xii. 1878, [). 254, pi. ii. fig. 28. 

 Utakwa River, 2500-3000 ft., Feb. 1913. 



This is a very handsome species, which has also been found in Misol and the 

 Aru Is. 



H I S T K R I D ^. 

 Pl^sius ELLIPTICUS. 

 Plcesius eliipticus Mars. Moiiogr. Hister. 1853, p. 227, pi. vi. fig. 2. 



Mimika River ; 2. 

 Also found in Java, etc. 



E K T Y L I D ^. 



EnCAUSTES HUMERALIS. • 



Encaustes humeralis Crotch, Cist. Ent. i. 1869-1876, p. 478. 

 Utakwa River ; 3. 



Plagiopisthen australis. 



Engis australis Boisd. Voy. de TAstrolabe, Eut. ii. 1835, p. 146. 



Mimika River; 1. 



A common Australian insect, ranging from Ceram to New South Wales and New 

 Caledonia. 



Plagiopistiien politus, sp. n. 



Niger, nitidissimus, pedibus Isete rufis, elytrorumque maculis 2 utrlnque pallide tiavis, aiitica obhqua, 

 paulo pone humerum posita, intus ad basin attiugeuti, postica transversa, postmediana ; parum 

 elongatus, valde convexus, supra vix punctatus, prothoracis lateribus antice valde, postice 

 minute incurvatis, basi utrinque impresso ; scutello trausverso, obtuse angulato ; elytris sat 

 brevibus, lateraliter arcuatis ; antennis baud longis, articulis (clava excepta) moniliforraibus, 

 tertio longiori. 



Long. 10 mm. ; lat. max. 4'5 mm. 



Mimika River ; 2. {Types of the species.) 



A species allied to P. amhoinensis and P. corallipes, but of rather shorter and more 

 convex form, and extremely smooth and glossy. The elytral patches are paler in 

 colour, rathei widely separated at the suture, but reaching the lateral sulcus externally. 



