554 STUDIES IN AUSTRALIAN ENTOMOLOGY, NO. IX., 



F. Prothorax wholly Iffivigate, or 

 at most with only a few punc- 

 tures in basal fovea}. 

 (J. Prothorax with sides evidently ^ 



narrowed to base, basal \- r^ ' , . 01' 

 ' On. latus, bl. 



fovere strongly impressed .. / 



g(j. Prothorax with sides hardly 

 narrowed to base, basal 



foveie wide and shallow Gn. jricipe^t, Macl. 



FF. Prothorax rugulose-punctate 



on each side near base Gn. adelaicht, Casteln. 



EE. Third and fifth interstices of 

 elytra seriate-punctate. 

 H. Size large ; form wide, de- 

 j)ressed (elytra green, legs 



black).., Gn. herbaceus, SI. 



HH. Size rather small; form nar- 

 row (elytra dark bronze, 



legs testaceous)! ^tji. impressipennis, Casteln. 



DD. Protliorax rotundate on sides, basal 

 angles rounded off (interstices of 

 elytra convex). 

 i. Third interstice of elytra only 



seriate-punctate Gn. frogrjatli Macl. 



a. Third, fifth and seventh inter- 

 stices of elytra seriate-punctate Gn. aridinx, Blkb 



Synonymy. 



In order to render the table given above complete, it is neces- 

 sary to deal with tlie synonymy of this group of species. 



Gn. picipes. 



Harpnlus picipes. Macl., Trans. Ent. Soc. N.S.W. 1864, i. 

 p. 117; Diaplwromerus sexpuncfatus, Macl, P.L.S.N.S.W. 1888, 

 (2), iii. p. 466; D. sulcatulus, Macl., I.e. p. 467. 



I have found from examination of the types in the Macleay 

 Museum that Diaplioromern,s sexpunctatus and D. .sulcatulus are 

 founded on the same species; and after comparing specimens taken 

 by Mr. R. Helms on the Upper Ord River, Kimberley District, 

 W.A., with a cotype of D. sulcattilus from the Macleay Museum, 



