1850.] lAnnean Society. 71 



author stated other facts connected with the oeconomy of this singular 

 parasite, and mentioned that he is still engaged in its investigation. 

 The following are the characters and description of this new Acarus. 



Class ACARI. 

 Family Sarcoptides, Kcch. 

 Genus Heteropus, Newp. 

 Corpus elongatuni, subavticulatum. Caput mobile. Thorax a trunco 

 distinctus, ad latera corpusculis clavatis munitus. Pedes anterlores 

 palpiformes ; reliqui (parium trium posteriorum) zequales, arcuati, at- 

 tenuati, tarsis gracilibus 4-articulatis, articulo terminal! lato vesiculari. 

 H. vENTRicosus, pallid^ ferrugiueus, capite saturatioie, prothorace paribus 

 2 pilorum longorum, pedibus subrobustis ; articulis omnibus longe pi- 

 losis : tibiae articulo apicali corporis dimidium Eequante. — Long. \—^ lin. 

 $ gravidae abdomine magnopere inflato vesiculari. 



Hub. In postibus intra nidos Anthophorce retusce, apud Gravesend, in 

 Coniitatu Kent. 



March 19. 

 Robert Brown, Esq., President, in the Chair. 

 Grantham Robert Dodd, Esq., jun., was elected a Fellow. 



Read some Notes written by Mr. Seemann, the Botanical Collector 

 for Kew Garden, in the Voyage of H. M.S. Herald. Communicated 

 bv Sir W. J. Hooker, F.R.S., V.P.L.S. &c. 



April 2. 



Robert Brown, Esq., President, in the Chair. 



Read the commencement of a memoir " On the family of 7V/«- 

 riacecB." By John Miers, Esq., F.R.S., F.L.S. &c. 



