284 Mr. C. O. Waterliouse on new 



Lansb. I am now, however, convinced tliat it is a distinct 

 species. It is relatively rather narrower; the mandibles are 

 convex, i. e. the ridge which bears the teeth is not dorsal as 

 in arfahianus^ but internal in the ordinary way; the large 

 subapical tooth is more removed from the apex, and there are 

 three or four small teeth ratlier behind the middle. The 

 head has the same peculiar notch behind the eye, leaving two 

 small tubercles, but the surface round the eye is merely 

 rugose instead of being wrinkled. The thorax is more 

 convex, more obliquely narrowed posteriorly, with the sides, 

 especially anteriorly, distinctly arcuate. The mentum is more 

 broadly truncate anteriorly. 



In describing E. arfakianus, M. Lansberge has not, I 

 think, laid stress enough on the differences in the mandibles 

 in specimens of this species. In Odontolabis^ dimorphism is 

 common, but I do not remember any quite similar case in the 

 Dorcini. 



In E. arfakianus, var. maximus, the mandibles are rather 

 straight, simple, except a large tooth near the apex. 



In the var. minor the mandibles have a large subbasal 

 tooth, and besides the suba])ical one there are one or two 

 smaller teeth between the large teeth. 



This appears to me to be a distinct case of dimorphism, 

 and not a question of large and small examples. The 

 Museum specimens measure : — 



Var. maximus : 18 to 2G lines (mandib. inch). 



Var. minor: 19 to 24 lines (mandib. inch). 



These woukl correspond to what Dr. Leuthner calls telo- 

 dont and amphiodont forms. 



Cetoniidae. 



Poncilopliaris femorata, sp. n. 



Oblonf^a, tlcprcssa, nitidissima, cyanco-viridis : capito siibtilitor 

 punctulato, frouto puiictis uonnullis sparsa ; thorace la-vi. latora 

 versus punctis nonuullis sparsis ; clytris la;vibus, liiiois tribus 

 punctorum vix conspicuis, lateribus pone medium traiisvcrsim 

 slriatis ; pcdibus obscure rubro-purpurcis, fomoribus obscure 

 rubris. 



Long. 10 lin. 



Ilah. Doreh (New Guinea). 



Besides the dilferenee in colour, this ditlcrs from P. Uliitci 

 in being rather narrower, the head is much more finely punc- 

 tured, with only a few larger punctures on the forehead. The 



