Australian and Taxuiaiiian Coleiyptera. 219 



Ptinidae. 



Several remarkable genera belonging to this family are to be 

 taken in ants' nests, the species occurring sometimes in quite 

 considerable numbers, but usually sparingly. They are all 

 characterised by remarkable antennae and extremely minute 

 palpi, and many have a very large prothoracic fovea. They are 

 all apterous. 



Polyplocotes loiigicollis, Westw. 

 Occurs with ants. 



Po/i/p/arntes nitidus, Westw. 

 Occurs with ants 



Diplocotes Iiowiftanus, Westw. 

 Occurs in nests of ants under Ijark. 



DijjJocotes foveicollis. Oil. (Figs. 24, '55.) 

 Occurs in nests of ants under bark.i 



Diplocotes niger, v.d. Poll. 



I have not seen the original description of this species, but 

 Mr. Blackburn2 regards it as synonymous with Diphobia fami- 

 liaris, Oil. 



Diplocotes ariniro/lis, n.sp. (Figs. 25, 26.) 



Dark reddish castaneous, club somewhat paler. Upper sur- 

 face entirely glabrous ; sterna with a median stripe of very short 

 golden clothing. 



Head transverse ; behind antennae bisinuate ; each side of 

 base subacutely jDroduced ; densely punctate. Antennae extend- 

 ing to middle coxae, first joint stout, slightly curved, and as 

 long as second and third combined, second slightly longer than 

 third and curved at the base, third to ninth very feebly decreas- 

 ing in size, tenth slightly longer than eighth and ninth 



1 An ant sent with this species by Mr. Oavey is vcn much like Calobopsis gaxseii, but 

 is somewhat larger, with the abdomen different. 

 •2 Proc. Linn. .Soc. N.S. Wales, 1892, p. 300. 



