1352 
REVISION OF THE GENUS HETERONYX. 
The clypeus is evenly margined and sub-truncate in front, its 
surface continuous with the rest of the head, the clypeal suture 
finely keeled and straight, the whole head very closely, strongly 
and rugosely punctured. The prothorax is about half again as 
wide as long down the middle, and its base is about a third again 
as wide as its front margin, which is slightly bisinuate, with angles 
but little advanced ; its sides are gently arched and form on either 
side a roundly obtuse angle with the base which is bisinuate, its 
middle part only moderately produced backward ; its surface is 
extremely coarsely and rugosely (but less closely than that of the 
head) punctured. The elytra are punctured even more coarsely 
(l)ut a little less closely) than the prothorax ; they are a good deal 
wrinkled transversely and have scarcely any ti’ace of sti’iation. 
The pygidium (which is testaceous in colour) is punctured strongly 
(but much less so than the elytra), and closely. The whole upper 
surface is rather densely clothed with semi-erect rather short 
pubescence (the lateral fringe of the elytra being carried strongly 
round the apex), and has a mottled appearance owing to some 
infuscation on the elytra round the scutellum and on the hinder 
part of the disc with some indication of infuscate spots on the 
prothorax. On the undei’side there is the same mottled appear- 
ance, almost every part (except the metasternum which is wholly 
piceous) being more or less testaceous clouded with infuscation ; 
the metasternum and hind ccxse are coarsely punctured, the hind 
body I’ather coarsely but not deeply, the puncturation and rows of 
hairs (which are fine and long) being continued all across. The 
hind coxse are opaque (in strong contrast to the rest of the sur- 
face), and have a whitish pruinose appearance ; their hind margin 
is cut quite obliquely leaving a wide piece of the basal ventral 
segment visible at the side and almost concealing it towards the 
middle ; the hind coxie are quite as wide as the metasternum 
(which is strongly protuberant) on its middle line ; the hind 
femora are considerably wider than the intermediate with their 
inner apical angle rounded off and scarcely at all prominent. 
Western Australia •, sent to me by E. Meyriok, Esq. 
