126 



IV Tarsi posteriores baud compressi; 



metasternum simplex .... Hydrobtdes. 

 (Oouli duo; abdomen segmeiitis veu- 



tralibus quinque.) 

 Tibiae et tarsi posteriores ciliatae; 

 antennae octo-articulatae . . . Berosus Leach. 



(14 arter). 

 Tarsi posteriores breviter cib'atae; 

 trochanteres postici magni; anten- 

 nae octo-articulatae Laccohius Er. 



(2 arter). 

 Tibiae et tarsi simplices; trochan- 

 teres postici mediocres. 

 Palpi maxillares elongati, articulo 

 ultimo breviore; antennae novem- 



articulatae Philhydrus SoL. 



(13 arter). 

 . Palpi maxillares articulo ultimo lon- 

 giore; antennae 9- (raro 8-) arti- 



culatae Hydrobius Leach. 



(7 arter). 

 V. Tarsi posteriores articulo prirao . 



elongate SPHAERIDIIDES. 



Antennae novem-articulatae; meta- 

 sternum antice productum . . . Cyclonotum Er. 



(2 arter). 

 Antennae octo-articulatae; mesoster- 

 nura angustum; prosternum cari- 



natum Cercyon Leach. 



(12 arter). 

 Mesosternura pentagon urn dilatatum. 



Prothorax raarginatus Megalosternum MuLS. 



(1 art). 



Piothorax immarginatus Cryptopleuriim MuLS. 



(1 art\ 

 Proceed. Acad. Philad. VII, p. 356. 



AcKERMANN har beskrifvit en ny art, Berosus 

 Salmuriensis, fran Saumur Ann. Soc. Linn, de Maine 

 et Loire I. p. 197. 



Atskilliga rattelser och tillagg till Monografien 

 ofver Palpicornia hafva af MuLSANT blifvit inforda 

 i Mills Opusc. VIL p. 166. 



