248 



iaii Coleoptera, the publication of which has been delayed or 

 postponed. 



The species described belong to the Cerambycidae and 

 Curculionidae and to genera already well-known in the Is- 

 lands. Particularly interesting are the Cossonid Heteramphus 

 swezeyi, the peculiar leaf-mining habits of which have already 

 been published by Mr. Swezey; and that other member of the 

 same group, Dryotrihiis unlderi, obtained on Midway Island 

 by my friend Mr. G. P. Wilder. The tyi^ical species of Dryo- 

 trihus — wrongly described by me in the "Fauna" as a new 

 genus and species under the name Thalaitodora hisignis — 

 is of extremely wide distribution and appears to be entirely 

 attached to drift-wood. It occurs on several islands, at least, 

 of the Hawaiian group, on the Australian coast, and in the 

 West Indian Islands, apparently unchanged specifically, or 

 practically so. Mr. Wilder found the form described below, 

 not in drift-wood, but in the dead stem of some plant on Mid- 

 way Island. The typical species I have found in the Islands 

 on several occasions, but always in drift-wood and never away 

 from the beach, and I have examined a W^est Indian example 

 kindly given to me by Mr. G. C. Champion. 



The description of one small species of that most difficult 

 genus Proterhinus is included in this paper, because it is of 

 rather special interest, being attached solely, so far as I know^, 

 to the rare and almost extinct tree Kohia (Gossypiam) dryna- 

 rioides. Only a few examples were found amongst vast num- 

 bers of the allied, widely distributed and polyphagous species 

 Proterhinus deceptor. 



Plagithmysus kuhnsi sp. n. 



Head, thorax and femora black, the latter red basally, as also 

 the whole of the hind tibiae; the tarsi, antennae and elytra more 

 testaceous, the latter with the usual elongate, dark, wedge-shaped 

 area, containing the lines of pale yellowish pubescence, which diverge 

 anteriorly. These lines are similar in color to those of Callithmysus 

 koehelci. Pronotum strongly crested and very densely punctured and 

 scabrous, dull above, but laterally the surface becomes smooth and 

 shining and the punctures distinct and separate, some parts being 

 impunctate or nearly; the pubescence is sparse, whitish, and does not 

 form bands. Elytra on the basal portion very densely sculptured and 

 inconspicuously clothed with short white pubescence. The divergent 

 pubescent lines are well defined. Hind tibiae with black pubescence, 

 that on the femora short and white, but black or dark near the apex. 

 Hind femora formed much as in male P. darwinianus, etc., but prob- 



