I90 FAUNA HAWAIIENSIS 



joints being quite stout, whereas in the other they are very slender. This seems to be 

 the only good character to distinguish the two, and it may be observed that the specific 

 •differences between P. gigas and P. crassicornis are quite similar. 



Hab. Kauai. A single pair (^ ?) were taken together on the high plateau in 

 April, 1895. 



(10) Proterhinus collaris Sharp. 



Proterhinus collaris Sharp, Tr. Ent. Soc. London, 1879, p. 96. 



This species is very similar in form and general appearance to P. eiilepis, but may 

 be distinguished by the unusual length of the scape of the antennae. The second joint 

 is very short, the third elongate and slender. In the $ the eyes are unusually remote 

 from the anterior margin of the thorax. The squamosity of the elytra appears to be 

 much broken up to form roundish spots. The thorax is decidedly elongate. In their 

 systematic catalogue Blackburn and Sharp have sunk this species as a variety of 

 P. nigricans, but I cannot think the two are identical, P. collaris being a larger insect, 

 and very different in general appearance, the ^ having relatively smaller eyes, and much 

 more remote from the thorax, while the basal joint of the antenna in the % is much 

 more elongate and more slender, than in P. nigtncans %. 



Hab. Kauai mountains (Blackburn). I have not met with this species, and have 

 seen only the two types in Dr Sharp's possession, and two or three individuals in the 

 British Museum from Blackburn's collection. 



(11) Proterhinus amaurodes, sp. nov. 



Statura parva, vel saepe minima, nigricans vel rufo-piceus. Antennae sat graciles. 

 Pronotum dense rugoso-punctatum, parum squamosum, antice impressum, baud con- 

 strictum, lateribus rotundatis. Elytra obscure sed dense punctata, ad humeros macula 

 pallida squamosa, et postice maculis rotundatis compluribus ornata, humeris plus minusve 

 productis, semper acutis et distinctis, setis erectis inconspicuis et brevissimis. Tarsorum 

 lobi parvi. Abdominis segmentum primum ventrale subfortiter punctatum. ^ %. Long. 

 1-5 — 2-5 mm. 



In well-developed examples this is rather a distinct little species. The squamosity 

 of the thorax is sparse, and that of the elytra is much broken up, forming distinct spots. 

 There is always a distinct patch extending back from the humeral angles, and a number 

 of roundish spots on the posterior parts of the elytra. The antennae are moderately 

 long and slender, with 3-jointed club. There is usually a distinct impression on the 

 thorax in front, the posterior impressions being absent or nearly obsolete. The humeral 



