A astral ian and Tasmaniaii Voleoptera. '^W 



Additional details are Lriven under the generic synopsis. The 

 family at present \iva\ be phiced between the Rhysodidae and 

 Cucujidae. 



Tlie entire, or ahnost entire, concealment of the palpi is a, 

 character that is not unique in beetles, but so far as I am aware,, 

 outside of the Bliysodidae, only occurs in myrmecophilous 

 genera. 



Tretothorax, n.g. 



Head elongate, narroAved behind eyes and strongly constricted 

 at base, sides in front of eyes incurved, and then suddenly 

 inflated at antennae, apex abruptly truncate and without clypeal 

 sutures. Eyes rather large, round, lateral, rather finely faceted, 

 inserted much closer to base than apex. Antennae ten-jointed, 

 short, fairly stout, of almost even width throughout, first joint 

 longer than tenth, this moderately, all the others strongly 

 transverse, apex abruptly truncate. Palpi entirely concealed. 

 Mentum strongly transverse, entirely concealing the mouth 

 parts, front semicircularly emarginate in middle. Gular sutures 

 represented by two short, deep basal grooves. Piothorax elon- 

 gate, deeply grooved both longitudinally and ti'ansversely, 

 prosternal sutures deep in front. Scutellum minute. Elytra 

 long and somewhat depressed, sides gently rounded, and clasp- 

 ing the bod}'. Mesosternum fairly long, outer side pieces much 

 larger than the inner, and with deep sutures, the inner not well 

 defined. Metasternum elongate, hind apex notched in middle ; 

 episterna very narrow. Abdomen long, first segment about as 

 long as second and third combined, second slightly longer than 

 third, third than fourth, and fourth than fifth. Legs rather 

 short and thin ; front coxae touching, globose, inserted at 

 extreme base of prosternum, and with open coxal cavities, 

 middle coxae slightly larger, but deeply buried and lightly 

 separated ; hind coxae still larger, transverse, sides touching 

 ■elytra, separated internally by a triangular intercoxal process ; 

 femora linear, not grooved, edentate, hind pair scarcely passing 

 middle of abdomen ; tibiae slightly shorter than femora, termi- 

 nated by two short stout spines ; tarsi linear, not spongiose on 

 lower surface, apical joint slightly longer than first, and first 



