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REVISION OF THE AUSTRALIAN CURCULIONIDuE 

 BELONGING TO THE SUBFAMILY CRYPTORHYN- 

 CIIIDES. Part XL 



By Arthur M. Lea, F.E.S. 



This part* deals with a small group of genera that cluster 

 around Idotasio, and nearly all of whose members are small or 

 very small, and usually polished. If large scales are present, the 

 derm beneath them is never opaque ; in all, the mesosternal 

 receptacle is highly raised, and the metasternal episterna are very 

 small. They are usually apterous, strongly convex, and without 

 prominent shoulders. Most of the genera and species are ex- 

 Australian. Idotasia was referred to the Zygopides by Mr. 

 Pascoe; I know comparatively few genera of that subfamily, hut 

 its distinct pectoral canal, bounded behind by a raised meso- 

 sternal receptacle, and scrobes terminating at the eyes, convince 

 me that it belongs to the Cryptorhi/nch)des. Mr. Pascoe de- 

 scribed the metasternum as " normale," but it is, in fact, very 

 peculiar, whether the genus is regarded as belonging to the Cryp- 

 torhynchides or to 'the Zygojndes. The nearest genus to it, known 

 to me, is Ampac/in, referred, without hesitation, to the Cryp- 

 torhyii chides by Mr. Pascoe. 



The Australian allied genera may be tabulated as follows : — 

 Hind femoia slrongly dilated; abdomen with a semicircular 

 shining ridge. 



Clul) of antennae short Ampagia. 



Club long Amydala. 



Femora not specially dilated; abdomen without a shining 

 ridge. 



Scutelhim present; winged Alatidotasia. 



Sculelluni absent; apteious. 



Metasternum moderately long Idotasia. 



Metasternum sliort Ampagiosoma. 



* For convenience, CamptorrhinuH, an isolated genus, is dealt with at the 

 end of this part. But, except that it belongs to the same subfamily, it has 

 little in common with Idotasia. 



