BY ARTHUR M. LKA. 609 



cavernous.* Metasternum large, longer than first segment of 

 abdomen, transversely and largely but shallowly excavated; flanks 

 almost vertical, not much longer than wide, base oblique, apex 

 with coxal emargination; episterna almost entirely concealed, the 

 extreme apex appearing as if belonging to the mesosternum. 

 Abdomen moderately large, sutures distinct, two basal segments 

 concave in ^, the first larger than second, intercoxal process 

 very wide; three apical segments of almost equal width and 

 suddenly depressed below second; third and fourth combined 

 shorter than second or fifth. Leys long; posterior coxse almost 

 touching elytra; femora strongly grooved from base to apex, 

 extreme base strongly compressed, dentate or not;t tibiae some- 

 what compressed, straight or almost straight; tarsi stout, third 

 joint wide, not very deeply bilobed, claw-joint thin; claws very 

 minute. Elliptic, convex, highly polished; apterous. 



This genus is abundantly represented in New Guinea, and 

 sparingly in New Zealand. The two Lord Howe Island species, 

 referred by Mr. Olliff to Idotasia, belong, I believe, to Ampagia; 

 one of them certainly does, and here they are dealt with under 

 that genus. 



The Australian species may be thus tabulated : — 

 Prothorax with coaiBe punctures, no larger (but more 



crowded) on sides than on disc Iwia, n.sp. 



Prothorax with punctures much larger at sides than on 

 disc. 



Elytra not punctate on hind declivity, except at 



extreme apex albidospama, n.sp. 



Elytra distinctly punctate on posterior declivity. 



Strice invisible from most directions evanida Pasc. 



Striffi fine but distinct cequaUs Pasc. 



Idotasia evanida Pasc; Mast. Cat., Sp.No.5578. 



Black, shining. 8nowy-white scales in rostral grooves, and 



forming two rows on femora; apex of femoi-a with scales in 



punctures, a moderately large patch on the posterior; tibise with 



very small scales; each lateral prothoracic puncture with a scale. 



* At least in the Australian specitis. 



t Edentate in the Australian species. ^ 



