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Genus. Rhombonyx, Kirby. 



Type of the Genus. Melolontha Holosericea, 



Fab. 



JVasus apice truncatus reflexus. 



Labium inflexum. 



Antennce 9-articulatse. 



Palpi maxillares articulo extimo ovato. 



Cubitus subbidentatus. 



Unguiculi insequales, simplices, altero longiore 

 majori, anteriori rhombiformi. 



Corpus ovatum. 



Thorax abdomine angustior. 



Elytra e basi ad apicem sensim increscentia abdo- 

 mine breviora, lineisque elevatis insignita. 



Podex magnus triangularis deflexus. 



Mr. Kirby has very properly separated this genus 

 from Anomala, from which it differs in many 

 respects. It is allied to Euchlora of Mr. MacLeay. 

 All the species of Rhombonyx are glabrous and 

 rarely if ever have the elytra with elevated lines. 

 This form seems peculiar to Siberia, Japan, and 

 China. 



