Broun. — New Genera and Species of Coleoptera. 401 



Antennae inserted on the sides of the forehead at sume distance from 

 the eyes, 10-articulate ; basal joint stout and nearly the length of the 

 following two combined, 2nd slightly shorter than 3rd, 6th a little 

 larger than 5th, 7th moniliform and rather smaller than adjoining 

 ones, 9th abruptly enlarged, subquadrate, 10th" longer, conical. 



Legs elongate, tibiae unarmed; tarsi slender, pentamerous. 



Length, 2 nun. ; breadth, -£ mm. 



Retaruke, near Erua. Four individuals of this extremely slender 

 but interesting beetle were found amongst leaf-mould collected for me 

 in March, 1910, by Captain H. S. Whitehom, in whose honour it has 

 been named. 



Obs. — Many years ago I sent a specimen of the first species 1 had 

 found to M. Albert Fauvel, of Caen, one of the greatest European 

 authorities on Staphylinidae, who named it Dimerus brouni. It evi- 

 dently represented a new genus, but I have been unable to obtain its 

 description. The name Dimerus has now been used for one of the 

 Pselaphidae by Fiori, and a copy of the diagnosis published in Atti 

 Soc. dei Naturalisti di Modena, 1899, vol. 32, p. 103, is now in my 

 possession, having been written for me by Mr. C. O. Waterhouse at the 

 British Museum. 



Group Osokiidae. 



3193. Holotrochus setigerus sp. nov. Holotrochus Erichson, Lacord. 



Hist, des Ins. Coleopt., torn. 2, p. 113. 



Cylindrical, shining; nigrescent; posterior angles of thorax, the 

 labrum, legs, and antennae rufous ; sparingly clothed with suberect, 

 slender, yellowish setae. 



Head narrower than thorax, with distinct, remote punctures. Eyes 

 minute. Thorax . rather broader than long, gradually narrowed an- 

 teriorly, irregularly, moderately coarsely and distantly punctate. Elytra 

 twice as broad as long, with a basal impression near each side, their 

 sculpture nearly the same as that of the thorax. Hind-body elongate, 

 distinctly and distantly punctured, 5th segment largest, 7th bispinose 

 at the extremity. 



Tibiae straight, the anterior with about 6 minute spines along the 

 outside, intermediate with more, posterior with 2 or 3 only. 



Antennae with the 3rd joint rather longer than 2nd, 4th distinctly 

 smaller than 5th, 10th about as loug as the conical terminal joint. 



Easily recognized by the rather coarse irregular punctation and sub- 

 erect setae. 



Length, 3J mm. ; breadth, 1 mm. 



Greymouth. I am indebted to Mr. J. H. Lewis for a specimen. 



06.S-. — One description I have been unable to get, so it is just possible 

 that the missing one, Dr. Eppelsheim's H. brachyptems, may prove to 

 be identical with H . setigerus. 



Group OXYTELIDAK. 



3194. Bledius bidentifrons sp. nov. Bledius Leach. Lacord. Hist, des 



Ins. Coleopt., torn. 2. p. 114. 



Elongate, narrow, nigrescent;* head, thorax, and elytra rather dull, 

 with greyish setae, those on the elytra suberect and much shorter than 

 the others; hind-body glossy black, and bearing numerous elongate, 



