50 Mr. D. Sharp on some 



joint elongate, fully as long as tlie two following together. 

 Apex of middle coxte scarcely separated from the hind 

 coxa3. 



This species is a very distinct and peculiar one, and 

 may probably prove to be sufficiently distinct from the 

 others to form a new genus. The only individual I have 

 seen is in bad condition; it is, according to Mr. Black- 

 burn, an extremely rare insect and is found under decaying 

 logs, near Honolulu, at an elevation of about 1,500 feet. 



Pachycorynus discedens, n. sp. Depressus, capite tho- 

 raceque piceis, parce punctatis, medio Itevigatis, antennis 

 pedibusque testaceis, elytris testaceo-obscuris crebre punc- 

 tatis, abdomine nigricante, apice ferrugineo, marginibus 

 lateralibus fusco-testaceis. Long. 6 — 7 mm. 



Antennre reddish-yellow, slender, none of the joints 

 transverse, the basal joint as long as the three or four 

 following ones together. Head quadrate, piceous, with 

 the clypeus more red, coarsely but sparingly punctured, 

 the punctures nearly or altogether wanting along the 

 middle ; the oblique groove extending inward from the 

 front anterior margin of the eye is distinct, as well the 

 parallel grooves at the insertion of the antennae. Thorax 

 almost as broad as the elytra, distinctly narrowed behind, 

 with a series of punctures on each side of the middle, 

 extending from the base to the apex, and with irregularly- 

 placed lateral punctures. Elytra scarcely longer than the 

 thorax, of a sordid or infuscate yellow colour, regularly 

 and somewhat closely and distinctly punctured. Hind 

 body blackish, passing into red at the extremity, and 

 with the elevated lateral margins obscurely yelloAv. It is 

 sparingly punctured, the punctuation wanting along the 

 middle. The legs are short, the tarsi quite short and 

 stout. 



This species differs from the East Indian and Papuan 

 P. dimidiatus, by the presence of distinct oblique lateral 

 grooves on the head, and by its middle coxae being 

 approximate, though not contiguous. It must be con- 

 sidered a still more aberrant form of XantholinidcB than 

 the insect alluded to, but I have not thought it advisable 

 to give it a distinct generic name at present. 



Found by Mr. Blackburn under bark in a forest near 

 Honolulu. 



Oxytelus advena, n. sp. Rufescens, capite, elytris 



