188 THE AUSTRALIAN NATURALIST. 
Fanily CARABIDAE.—Of this family I have taken 
but two specimens, which were in the nests probably by 
accident. The ants were Componotus nigriceps, Iri- 
domyrmex rufoniger. 
Family STAPHY LINIDA E.—Conosoma sp., taken at 
Como in the nest of Hetatomma metallicum, are small shiny 
beetles, 4 mm. in length, with short elytra and elongated 
abdomen tapering to a point. They are extremely active 
and difficult to capture. 
Glyptoma Hingi, Lea.—Is a chestnut-red beetle, 245 
mm. long, taken in numbers in the nests of Jridomyrmex 
rufoniger. 
Polylobus semiopacus, Lea—Taken in the nests of ZL, 
metallicum, are brownish in colour and 11/4, mm. long. 
Family PSELAPHIDAE. Batrisodes myrmecoplilus, 
Lea.—Taken in various nests of Huponera lutea. 
Batrisodes bimucronatus, Raffr. (not previously re- 
corded from ant nests) —Taken at Narara in a nest of 
small black Jridomyrmex, in a tree stump. 
Batrisodes, sp—Taken in the nest of Huponera lutea 
at Canterbury. 
Eupines flavoapicalis, Lea.—In nest of Huponera lutea. 
Tmesiphorus formicinus, Macl—In nests of Euponera 
lutea. 
Plectusodes breviceps, Raffr—In nests of Cremasto- 
gaster sp. and Ectatomma metallicum. 
Plectusodes sp.—In nest of Huponera lutea. 
Articerus, two sp.—One. sp. taken at Como in the 
nest of Zridomyrmesx rufomger; the other in the nest of a 
small black Iridomyrmex at Berowra. This genus is very 
curious, having the antennae apparently one-jointed. All 
the Pselaphidae mentioned are of a brownish colour, and 
have short elytra, leaving a number of abdominal segments 
exposed. None exceed 3 mm. in length. 
Family SCYDMAENIDAE, Scydmaenus incerticornis, 
Lea.—Taken in the nests of Ividomyrmex rufomger. 
Scydmaenus sp—tIn the nest of a small black 
Iridomyrmex. 
Scydmaenlla pusilla, WKing—Taken in nest of 
Stenamma longiceps. 
