516 Mr. DRharp on some new 
sides curved and sinuate in front of the base, so that the 
very definite hind angles are rectangular; the surface is 
densely but indefinitely rugulose-punctate, and the disc 
bears four rather indistinct impressions. The elytra are 
depressed, their surface is but little uneven ; they bear 
very recular and distinct striz, which are coarsely but 
indistinctly punctured ; the interstices are very flat, and 
bear fine short sete arranged in a serial manner. The 
hind body is very dull, and is densely punctate, but the 
puncturation is very indefinite. 
The species is readily distinguished from those yet 
known ; it comes nearest B. omalioides, but is very dis- 
tinct by the dull surface, and the very dense, peculiarly 
subobsolete, sculpture of the dorsal segments ; it is very 
similar in form to an Omaliwm, such as the European 
O. rivulare. 
Three specimens of this species were found in the 
stem of a dried fern, at an elevation of about 3000 feet, 
on Mauna Kea, Hawaii. 
Brachypeplus blackburni, un. s. 
Fere angustus, parum depressus, nigro-zneus, nitidus, 
levigatus, antennarum basi pedibusque sordide testaceis ; 
prothorace subquadrato, elytris angustiore; his elon- 
gatis subtiliter seriatim punctatis, interstitiis vix punc- 
tatis. Long. 32, lat. 14 mm. 
Antenne rather elongate, with large and abrupt club, 
the 8th joint not being transverse. Head with broad 
neck, and therefore little constricted behind the eyes; the 
surface sparingly and rather finely punctured. Thorax 
elongate, nearly as long as broad, truncate in front; the 
sides but little curved, but distinctly smuate some distance 
before the base, the hind angles rectangular ; the surface 
sparingly punctate like the head. LElytra elongate, with 
distinct series of fine, rather distant, punctures, and the 
interstices between these very finely and sparingly punc- 
tured. Legs elongate and slender, sordid yellow. 
I have much pleasure in naming this remarkable 
Nitidulid after Mr. Blackburn, who discovered it by 
beating flowers on Mauna Loa, Hawaii, at an elevation 
of over 4000 feet. 
