56 Mr. Waterhouse's Deiicriptions of Heteromera, i^c. 



Opatrum servicolHs, Walker, belongs to the genus Bradymerus, 

 (Bolitopliaginte). 



Ri/f/iitndus pedinoides, White, as figured and described by 

 Blanchard, (Voy. Pol. Sud.), has little in common with White's 

 insect which I have already recorded as belonging to the Hydro- 

 p)Mlidie ; Blanchard's insect appears from the figure to belong to 

 the Helopidcf. 



Tanychilus metcdlicus, White, as figured and described by 

 Blanchard is an Amarosoma, {Helopldiv). Tanychilus of New- 

 man belongs to the family Cistelidcn, and as the genus was well 

 known to White, (Newman's types being in the Museum), it 

 would seem highly probable that Blanchard's insect is quite 

 distinct from White's, especially as we possess a species of 

 Tanychilus from New Zealand, which agrees very nearly with 

 White's description. 



