610 STUDIES I\ AUSTRALIAN ENTOMOLOGY, NO. XII., 



When I formerly reviewed the species of Sarticus (These 

 Proceedings, 1889, [2] iv.) I offered a diagnosis of the genus 

 which ina}^ be taken as accurate for the typical species of the 

 genus; but there are three species'^ which offer decided differences, 

 and which would have to be excluded from Sarticus if that 

 generic definition were rigidl}^ adhered to. It seems better to 

 jDlace such aberrant species in a genus beside their nearest allies, 

 rather than to place them in different named groups with an idea 

 of maintaining symmetry in what may be, after all, a confused 

 and artificial S3'^stem of classification. 



The following features require notice : — 



(1) Prosternum with intercoxal declivity always rounded; 

 anterior margin usualh^ with an entire border, sometimes obso- 

 lescent in middle, but only wanting altogether in S. sv.Icatus and 

 S. hlackburni. In my descriptions of *S'. auhei, Casteln., S. 

 macleayi^ and S. 'monarensis, I have said, " prosternum without 

 a margin "; this referred to the base of the intercoxal part. 



(2) Mesostermtm with intercoxal declivity usually deeply emar- 

 ginate (but hardly at all so in S. im^^a^'). 



(3) Onychium ( = fifth joint of tarsi) spinulose or not beneath. 

 As mentioned above (under Notonomus), my attention has been 

 drawn to this feature by M. Tschitscherine. It seems constant, 

 and I now record it among the species known to me as under :■ — 

 {a) Onychium spinulose beneath : 



*S'. sulcatus, hlackburni, auhei, discopunctatus, coradgeri, 

 ohesulus esmeraldipennis, civilis, habitans, macleayi, 

 cooki, ischuus. 

 (b) Onychium glabrous beneath : 



*S'. impar, cycmeocinctics, dampieri, 7nonarensis, cycloderus, 

 iriditi rictus. 



(4) Third elytral interstice normally 3-punctate, but in aS'. 

 civilis, S. brevicornis,j and >S'. dampieri 4-punctate. 



* S. ( Coronocanthus ) sulcatus, S. ( Pterostichus ) hlacJchurni^ SI., and S 

 impar, n.sp. 



t Unknown to me in nature. 



