COLEOPTERA 441 



(3) Gonioryctus koac, sp. nov. 



Latus, flepressus nitidus, subtilissime pubescens, ferrugineus, limbo pedibusque 

 flavescentibus, capite infuscato ; elytris sulcis parum protundis latis, vage fortiter 

 punctatis. Long. 8 mm., lat. 3:5: mm. 



In the male the hind margin of the pygidium is not rounded, but forms a very 

 obtuse angle in the middle : the last ventral is nearly truncate, feebly bisinuate : the 

 supplementary segment is remarkably broad, rounded, and bears long hairs on the 

 hind margin. In the female the ape.x of the pygidium is emarginate, and the angles 

 bear long hairs ; the hind margin of the last ventral has a pencil of hairs on each side, 

 and is just perceptibly emarginate between them. 



With an ob\'ious general resemblance to G. iiiaiiiciisis and G. kaua/aisis this is 

 quite distinct. It is a recent discovery made by Mr Perkins who found it in the winter 

 of 1903 under the bark of Koa tree. 



H.\B. Oahu, Waianae mountains, 2000 ft. (Perkins, in 1903). 



(4) Gouiorvctiis inolokaicusis, sp. nov. 



Sat latus, ferrugineus, fusco-variegatus, subaenescens ; elytris parum impressis, 

 obsoletius sulcatis, evidenter seriatim punctatis. % Long. corp. 7^- mm., lat. 2f, long. 

 prothoracis if, lat. prothor. 2^^, long elytr. 3 mm. 



I have seen only two examples — both females — of this species. It has a slight 

 resemblance to Go7iiotIiorax fugitivus, and as the femora are slightly longer than in 

 the other species of Gonioryctus it tends to connect the two genera : they are however 

 definitely shorter than in Goniothorax fugitivus. 



The antennae are less elongate than in G. latus ; the head is very broad, the 

 thorax is rather strongly transverse, and its punctuation is more definite than in 

 G. latus, and its pubescence is very slight. The surface of the elytra is rather uneven, 

 and they have a marked metallic reflection, and a scanty, but not very short, setosity ; 

 definite series of punctures can be seen, but they are fine and the intervals are broad. 

 The pygidium is elongate, and forms an angle in the middle ; the last ventral is almost 

 truncate, with a tuft of hairs on each side : as the pygidium is markedly longer than 

 the last ventral, and has long cilia on the hind margin, it looks underneath as if there 

 were a supplementary segment in the female se.x, which is not the case. 



Hab. Molokai. Mountains, 4500 ft. 18. vi. 1893 (no. 181); Pelekunu, ix. 1893 

 (no. 145, Perkins). 



(5) Gonioryctus acmiiinalus, sp. nov. 



Latus, subdepressus, testaceus, hie inde (praesertim ad elytrorum latera) infuscatus ; 

 elytris vix sulcatis, seriatim sat subtiliter punctatis. $ Long. 6,^ mm., lat. 2 J, long, 

 prothoracis i:^, lat. proth. 2;^, long, elytr. fere 3 mm. 



57—2 



