( lix ) 
Many years ago this insect was apparently fairly common 
in the Fen District in the East of England, but there ai-e no 
records of its capture for a great number of years, and in fact 
it was supposed to be extinct in this country. 
Commander J. J. Walker brought for exhibition the follow¬ 
ing rare Coleoptera :— (a) a specimen of Latlirohium longipenne, 
Fairm., a beetle recently introduced as a British species, taken 
at Tubney, Berks., July 29, 1909 ; {b) a specimen of 
a remarkable ants’-nest beetle from the Atherton district, 
New South Wales, described by Mr. A. M. Lea under 
the name Tretothorax cleistostoma, and regarded by him as 
representing a new family of Coleoptera, the Tretothoracidae ; 
also the ant, Odontomachus coriarius, Mayr., with which 
the beetle was found. These specimens were communicated 
by Mr. C. French, a Fellow of the Society and Government 
Entomologist, Victoria, New South Wales ; (c) two specimens 
of Thomosis guanicola, Broun, a beetle allied to Sphaeridium, 
etc., taken by Dr. L. Cockayne among penguin guano on the 
Bounty Islands, 490 miles south-east of New Zealand. 
Mr. G. C. Champion was of opinion that Tretothorax was 
a member of the Heteromerous section of the Coleoptera, and 
Mr. G. C. Gahan that it belonged to the newly-constituted 
Family RhysojKiussidae. 
Mr. J. R. LE B. Tomlin brought for exhibition examples of the 
following British Coleoptera : («) Maci'onychus ^-tuherculatus, 
Miill., recently rediscovered in the River Teme, and previously 
only known from the River Dove, and not taken for at least 
40 years ; (6) Enicmus histrio, Joy and Tomlin, a new species 
described in the November number of the E.M.M.; (c) 
Laccohius regularis, Rey, from small “ sphagnum” pools at New¬ 
bury ; introduced recently by Dr. Sharp as L. scutellaris, 
]\Iots., but now considered by him as mox^e correctly 
named regidaris, Rey; (d) Cionus lo7igicollis, Bris., taken at 
Harewood Forest on Vei-hascimi thapstis on June 26, 1909, 
the only previous capture in Britain being by Mr. Moncreaff 
•at Portsmouth in 1871 ; and (e) Bemhidium tihiale, Duft., 
a melanic example taken this summer by the River Monnow. 
Mr. Tomlin also exhibited on behalf of Dr. David Sharp, 
F.R.S., examples of (/) Laccohius ytenensis, Sharp, 
a new 
