M. R. Storms on the Adhesive Disk o/'Eclieneis. 67 



colour. The scutellum is ochraceous. The elytra, glabrous 

 and punctate throughout nearly their whole extent, are of a 

 fine metallic blue. The lateral carinas are sharp and distinct 

 and extend about two thirds the length of the elytra. The 

 whole underside of the body, the femora, and bases of 

 the tibia3 are of a bright ochraceous colour. The tarsi and 

 apices of the tibia3 are of a very dark brown. 



Two females of this species only are known to me j they 

 are in the British- Museum collection. 



Thyestes funehris^ n. sp. 



Niger, pubescens ; capite punctato, nigro pubesceiite, fronte ad basin 

 obscure griseo ; prothorace supra dense punctato, omnino nigro ; 

 elytris antice punctatis, omnino nigris, pubescentibus ; antennis 

 nigris, articulis quarto ad octavum, ad basin et subtus griseis. 



liOng. 11^-13 mm. 



Hob. China (Kiu Kiang). 



Of the size and form of T. OeUeri^ Falderra., the only 

 other described species of the genus, but very distinct by the 

 absence of any white stripes. It is wholly black with the 

 exception of an obscure greyish patch on the front of the head 

 at its base, and of some of the joints of the antennai, which 

 are greyish at their base and underside. 



X. — The Adhesive Dish o/Echeneis. 

 By R. Stoems, Brussels. 



The singular disk covering the head of Echeneis has, since 

 ancient times, attracted the attention of naturalists, and more 

 recently its structure and morphological interpretatipn have 

 been several times investigated. Notwithstanding this, there 

 still remains a certain amount of divergence of opinion and 

 uncertainty as to the nature of the organ as a whole or of 

 its constituent parts. In the present paper an eiideavour 

 will be made to solve the different questions pertaining to 

 this subject. 



I. 



Morphological Value of the Disk as a whole. 



Two interpretations of the morphological value of the disk 



have been given. 



^ 5* 



