BY THOMAS G. SLOANE. 569. 



EE. Head very large, short, convex; 

 genaj projecting widely from 

 base of mandibles on each side, 

 truncate-oval on anterior mar- 

 gin. 

 /. Elytra with basal border strongly 

 dentate at humeral angles; head 



and prothorax metallic purple.. H. porphyriarurn, SI. 

 ii. Elytra with basal border hardly 

 raised at humeral angles (these 

 not dentate). 

 h. Colour black, elytra truncate - 



oval .. //. cordaiiun, Chaud. 



H: Colour of upper surface 



purple, elytra obovate H. superhum, Castelu, 



DD. Prothorax with sides not sinuate 

 before base, posterior angles 

 obtuse; elytra with humeral 

 angles rounded. 

 /. Elytra with third, fifth and seventh 

 interstices carinate ; black, pro- 

 thorax and elytra margined with 



green H. cyaneocinctum, Boisd, 



//. Elytra with third, fifth and 

 seventh interstices costate a little 

 stronger than others, elytra black- 

 ish-green II. atroriride, S!. 



4. Form oval; prothorax cordate; elytra with 

 interstices not carinate, third impunctate, 

 humeral angles rounded H. obscuripenne, Macl. 



TT o- r - II- -1 ^ H- carinatuium, Chaud. 



11. hinus of mentum oblique on sides \ zr ^ /-.i j 



^ (,ri. amctropterum, Chaud. 



For notes on the species omitted from the table above, see 

 P.L.S.N.S.W. 1894 (2), ix. p. 420; I have only now to add that 

 H. marginiferum, Chaud., which was omitted from those notes, ia 

 very closely allied to H. viridescens, Casteln.; it is unknown tO' 

 me in nature, but the description suggests that H. viridescens may 

 be not more than a variety of H. marginiferum. In my former 

 table {I.e., p. 418) too much reliance was placed on the form of 

 the outer angle of the basal border of the elytra, a feature which, 

 is evidently of subox'dinate value in grouping the species. 

 37 



