COLEOPTERA 195 



(20) Pi'oterhinus wikstroemiae, sp. nov. 



Subrobustus, nigricans vel rufo-niger, minus dense pallido-squamosus. Antennae 

 elongatae, graciles, articulis omnibus (secundo plerumque excepto) sat elongatis, clava 

 gracili, minus distincta. Oculi baud magni, sed fortius prominentes. Pronotum dense 

 rugoso-punctatum, latera versus sat dense squamosum, parte reliqua nudiuscula, antice 

 angustatum et impressum, lateribus subfortiter rotundatis. Elytra sparsim squamosa, 

 punctata, fere aequaliter convexa, setisque albidis erectis brevibus parum conspicue 

 vestita, angulis humeralibus fere rectis, minus distinctis. Femora sat fortiter incrassata. 

 ^ ?. Long. 3—3-5 mm. (Plate IX. fig. 4, ^.) 



This species is not at all closely allied to any other found on Kauai, nor indeed 

 is it very similar superficially to any of the other species. I have no doubt it is 

 nearest to P. dispar, although it differs from that species in numerous small points. 

 Both appear to be solely attached to the same species of poisonous shrub, and a 

 minute examination of the structural characters leaves no doubt that the two are more 

 nearly related than would appear to be the case on a superficial examination. Nearly 

 all the more remarkable characters of P. dispar are less developed in P. wikstroemiae. 



Hab. Kauai (4000 ft.), in various localities. Attached to Wikstroemia foetida. 



(21) Protcrliinus serricornis, sp. nov. 



Species parva, angustula, rufo-testacea, capite obscuriore, elytris utrinque plus minus 

 nigro-signatis. Antennae breves, robustae, articulis brevibus et latis, clava distincta nulla. 

 Pronotum squamulis pallidis minus dense vestitum, antice impressum. Elytra angusta, 

 pallide squamosa, setisque nonnullis brevissimis erectis et parum conspicuis vestita, 

 humeris baud productis. ^. Long, circa 2 mm. (Plate IX. fig. 6, J antenna.) 



This little species is quite distinct from any other (at least in the J' sex), by the 

 form of the antennae, which are unusually stout and short. The intermediate joints are 

 all of subrotundate form and so closely resemble the ninth and tenth that practically 

 there is no club. The eyes and lobes of the front tarsi are both very small. In what 

 I believe to be the ? of this species, the antennae are quite differently formed and by 

 no means remarkable in structure, since they terminate in an evident three-jointed club. 

 The intermediate joints, however, are rather less slender than in most species. The 

 posterior femora are not very strongly clavate. 



Hab. Kauai, Halemanu, May 1895; three or four examples taken. 



F. H. II. 26 



