118 ARGYRIPA SUBFASCIATA. 



NOTE IV. 



ON THE MALE SEX OF ARGYRIPA SUBEASCIATA 



RITS. , AND DESCRIPTION OF A NEW SPECIES 



OF THE CETONIID GENUS ALLORHINA. 



BY 



OLIVER E. JANSON. 



Argyripa s ub fa s c iat a, Rits. '). 



A unique female in the Leyden Museum was alone known 

 to the author when describing this species and as I have 

 recently received a male Argyripa which I have no hesi- 

 tation in referring to subfasciata , I take this opportunity 

 at the request of Mr. Ritsema of calling attention to the 

 peculiarities of this sex. The most remarkable character is 

 the extraordinary structure of the mentum , this being pro- 

 duced on the underside into a broad flattened vertical pro- 

 cess margined at its sides and slightly emarginate at the 

 apex; in the male of A. lansbergei Salle, I find an indi- 

 cation of a similar structure in a conspicuous obtuse tu- 

 bercle on the underside of the mentum , but in A. anomala 

 Bates it is entirely absent. In other respects the male of 

 subfasciata difiers from the female in having the head strongly 

 concave above, the lateral margins of the clypeus strongly 

 elevated and forming an obtuse flattened horn on each side , 

 the apex of the clypeus coarsely punctured with the mar- 



1) Notes from the Leyden Museum. VII (1885). p. 41. pi. 3. flg. 2. Q. 

 Notes from the Leyden. JVIuseuni , "Vol, X. 



