Australian and Tasmaniaii Coleoptera. 203 



strongly einarginated ; the inner emargination is semicircular, 

 with its outer points overhanging the basal excaA^ation in such 

 a manner that a line between them would be o?jlique ; looking 

 down into this emargination there may be seen fine golden setae, 

 and apparentlj'- remnants of a membrane, but there is no project- 

 ing membrane or fascicle as in some other species. TTie outer 

 emargination is deep, but narrow to its a])ices, with the outer 

 wall narrowly raised and oblique. 



(Jn presenting the specimen to me Mr. Davey wrote, '" I haA^e 

 just returned home from Bannockburn, and when there took 

 the most extraordinary ant-nest beetle that I have ever seen or 

 heard of, the nest in which it occurred was under a large stone, 

 the ants were small green metallic ones,i and after a little time 

 this beetle came tumbling up out of one of the tunnels in a 

 most comical way, and for a moment or two I took no particular 

 notice of it, merely thinking it was the severed head and thorax 

 of a slightly larger ant, the way it tumbled about in the sun- 

 light (although it has very good eyes) ; the hind legs are greatly 

 developed, and its antennae most peculiar." 



ChJamydnpsis glabra, n.sp. (Figs. 19., 4'6.) 



Almost black, margins of el3i;.ra towards base, and all ap- 

 pendages more or less reddish ca-staneous. Glabrous. 



Head impunctate. Prnthorar almost twice as wide as long, 

 disc gently convex and gently undulated to sides, Avhich are not 

 raised, apex gently incurved to middle, front angles strongly 

 rounded off, sides thence gently increasing in width to base ; 

 impunctate. Elytra slightly longer than wide ; with a strong, 

 transverse, subbasal depression which is widest in middle, but 

 of irregular shape, and terminated just before the margins ; 

 shoulders feebly depressed ; sides gently sinuous ; about middle 

 with a wide, feeble, elongated depression, near apex with a some- 

 what curved and deeper one : with si)arse, minute, irregularly 

 distributed punctures ; margins with a few minute scratches, 

 but without striae. Pyyidiu))i and propj'gidium, impunctate. 

 Under nirface with scarcely visible punctures. Prosternum 

 without a median ridge, but with a fine oblique one on each 



1 The ants belong-ed to Ectatomma metalUcum. 



