80 THE ENTOMOLOGIST. 
Mickleham the collector will probably be rewarded by finding 
Claviger foveolatus in the nests of Formica flava. Heterius 
sesquicornis may be taken in the same way, in the neighbourhood 
of London, in nests of Formica fusca; it has also occurred with 
F. flava and F. sanguinea. Certain ants, as Formica fuliginosa, 
frequent hollow trees, especially oaks; the moist frass at the 
entrance should be thrown on a piece of white paper and 
carefully examined; the bark also near the entrance may 
produce Amphotis marginata, and the crevices of the tree near 
the nest several other species. 
Mr. Janson, in his paper, gives a list of thirty-six.species that 
are attached to ants’ nests in this country; of these beetles some 
few are attached to two species of ants, but we may say roughly 
that five belong to Formica flava, eight to F’. juliginosa, six to 
F. fusca, eighteen to F. rufa, and four to Myrmica rubra. The 
genera represented are T'richonyx, Claviger, Myrmedonia (nine 
species), Homalota (the little section consisting of H. flavipes, 
H. confusa, and H. anceps), Oxypoda, Aleochara, Thiasophila, 
Homeeusa, Dinarda, Lomechusa, Atemeles, Leptacinus, Staphylinus, 
Quedius, Heterius, Dendrophilus, Saprinus (Myrmetes), Amphotis, 
and Monotoma, and larve of Cetonia aurata and Clythra 4-punctata: 
two or three of the species mentioned seem to be occasional 
visitants rather than true ant’s-nest beetles. 
Many additions have been made to this list since the time at 
which it was published; among them are several Trichopterygide, 
as Ptenidium formicetorum, Ptenidium Kraatzu, and Ptiliwn 
myrmecophilum, and also Scydmenus Godarti, Batrisus venustus, 
Myrmedonia plicata, &e. Dr. Power, by packing moss into the 
entrance of nests of Formica fuliginosa and leaving it for awhile, 
and then taking it out and shaking it over paper, and at the same 
time carefully examining the runs, found several good species, 
notably the very rare Ilyobates glabriventris and Microglossa 
gentilis ; by the same method he also found Homeusa acuminata, 
Corticaria serrata in abundance, and Atomaria fimetari. Certain 
Hemiptera, as Piezostethus formicetorum, also live in ants’ nests, 
as well as a few insects of other orders. 
The nests should not ruthlessly be pulled to pieces; at the 
same time if the locality is not near enough for a collector to 
visit it more than once or twice in the course of a season, it is a 
good plan to secure a large bag or two of refuse from the centre 
