158 Mr. G. J. Arrow on the 



with the exception of the sutural one, vanishing behind the 

 middle. In large males the rugose area of the pronotuna 

 extends from the front to the hind margin on each side, but 

 does not include the whole lateral part. 



Papuana laevipennis, sp. n. 



Nigra, nitida, sat lata, pectore parce rufo-hirto, clypeo utrinque 

 acute angulato, subtiliter punctulato, vertice utrinque rugoso ; 

 prothorace antice retuso, utrinque rugoso, dorso medio acuminato, 

 angulis anticis acutis, postiois obtusis, basi trisinuato ; scutello 

 Isevi ; elytria latis, Isevibus, stria suturali profunda, indistincte 

 punctata ; mandibulis valde porrectis, extus parum profunde 

 uni-incisis : 



cJ , capite cornu gracili antice planato, apace obtuse, armato ; pro- 

 thorace postice lobo elevate, summo acuminato tuberculoque 

 utrinque parvo, interdum obsolete, munito, margine antico 

 lateribusque, spatio posteriori carina arcuata delimitate excepto, 

 rugosis, superficie reliqua Isevi (iudividuorum maximorum autem 

 cornus basi antice etiam rugoso) ; pygidii lateribus crebre 

 punctatis, medio loevi : 



$ , capite tuberculo lato armato ; prothorace medio leviter acumi- 

 nato, antice rugose punctate, postice subtilissime parce punctu- 

 lato ; pygidio minute et crebre punctate. 

 Long. 20-29 mm. ; lat. max. 11-16 mm. 



Hab. Solomon Islands : Kieta. 



This is extremely like semisti'iata, with which it agrees in 

 all its structural details, but it is shorter and broader in 

 proportion and the elytra are very smooth, with only a single 

 sutural stria upon each. 



Papuana tridentipes, sp. n. 



Nigra, nitida, modice elongata, subtus picea, parcissime rufo-hirsuta ; 

 capite rugoso, clypeo antice sat late arcuato, utrinque minute 

 reflexo-angulato ; prothorace nitidissimo, vix perspicue punctate, 

 lateribus fortiter arcuatis, angulis anticis acutis, posticis obtusis- 

 simis ; scutello laevi ; elytris grosse striato-punctatis, punctis 

 anunlatis, apicibus crebre et aequaliter punctatis ; pygidio grosso 

 rugose-punctate ; tibiis anticis acute tridentatis ; mandibulis 

 extus trilobatis : 



<J , capite medio cornu parvo, recurvato, sat gracili armato ; pro- 

 thorace antice retuso, postice late producto, lobo utrinque breviter 

 acuminato, lateribus pone angulos anticos obtuse ascendentibus ; 

 pygidio convexo ; tarsorum anticorum ungue iuterno lato, baud 

 acuto, integro : 



2 , capite medio minute bituberculato ; pygidio ante medium 

 transverse carinato. 



Long. 17-21 mm. ; lat. max. 9-11 mm. 



