406 Mr. G. J. Arrow on the Lamcllicorn 



pronotum and elytra, are sufficient to distinguish this species. 

 It closely resembles P. insperata, Lewis, which is more brassy 

 iu colour and has only feebly punctured, not striolated, 

 elytra. The abdomen in the male of the latter is not deeply 

 channelled beneath, and sometimes only curved. Reitter, in 

 his i Bestimmungs-Tabellen/ has probably taken the new 

 species for P. insperata, or combined the two. On account 

 of the ventral groove, P. catapliracta belongs to the genus 

 Pachnotosia of Reitter {Liocola, Thorns.); but, even if it is 

 considered desirable to admit genera depending on a feature 

 peculiar to one sex (which I must dispute), the distinction 

 fails in P. insperata, different individuals of which might lie 

 referfed to different genera. Putting aside the species most 

 closely related to Cetonia aurata, which have a vertical meso- 

 sternal process, no adequate basis for the further subdivision 

 of the ancient genus Cetonia seems to me to have been 

 discovered, and 1 prefer to use the name Protcetia for the 

 remaining species. 



Five or six species very closely allied to P. catapliracta 

 occur in Japan, and equally closely related forms occur in 

 China and Formosa. The nomenclature of these has become 

 greatly confused, and I think the following table of the 

 species of the group will be serviceable. Two allied species 

 from Formosa have been named respectively by Capt. Moser 

 Lio cola forma sana and Calopotosia formosana. As these can, 

 at the most, only be subgenerically separated, I have 

 changed the specific name of the second to inquinata. It is 

 distinguished (perhaps in the male alone) by a peculiar 

 S-shaped spur at the end of the hind tibia. 



Key to Protsetia orientalis Group. 



Clypeus not distinctly bilobed. 



Elytra feebly sculptured, pygidium very 

 finely. 



Elytral marks diffuse marmorata, F. 



Elytral marks well defined. 



Large, bronzy; sides of pronotum sub- 

 rugose insperata, Lew. 



Small, green ; sides of pronotum simply 



punctured davidiana, Fairui. 



Elytra strongly sculptured. 

 Pronotum not deeply excised before scu- 

 tellum. 

 Green; pygidium coarsely strigose .... speculifera, Swartz. 

 Bronzy ; pygidium very finely strigose . formosana, Moser. 

 Pronotum deeply excised before scutellum. 

 Not very elongate; pronotum broad at 

 base, with rounded sides. 

 Sides of elytra densely striolated .... Irevitarsis, Lew. 



