284 RiiYNCiiopaoiiA. [Sm/'cronyx 



S. Reichei ; all the localities given above for the type form of S. Eeichei 

 have been primarily assigned by British authors to S. jwngermanniae. 



TANYSPHYRINA. 



This tribe contains the genus Tanys2>hyrus, Schon., of which only 

 one species is at present known; it is very small and lives on aquatic 

 plants, more especially the duckweed (Lamna), and is spread over 

 Europe, Northern Asia and North America ; it has been by some 

 authors referred to the Erirrhinina, but may easily be distinguished by 

 the very short onychium, which is contained entirely by the lobes of 

 the third tarsal joint. 



TANYSPHYRUS, Schonherr. 



The single species contained in this genus is a very small insect, 

 which is found on species of Lemna ; the rostrum is rather long and 

 stout and the antennas are inserted a little behind its apex ; the elytra 

 are rather short and broad and considerably broader than the thorax ; 

 the tarsal claws are free and the tibiae armed with a strong hook at 

 apex ; the femora are simple and the prosternum not emarginate. 



T. lemnse, F. Oblong, convex, dull black, underside thickly 

 clothed with whitish scales, rostrum black, shining, antennae and legs 

 pitchy-red ; thorax slightly transverse, with the sides very little rounded, 

 closely and distinctly punctured ; elytra oval, with strong punctured 

 striae, interstices rather convex, upper surface with more or less distinct 

 scattered spots of greyish scales ; legs robust and rather long. L. 1^ 

 mm. 



In ponds and ditches ; on duckweed (Lemna) ; often found in flood refuse, moss, 

 &c. ; generally distributed and common from the Midland districts southwards, but 

 rarer further north; Cheshire; Liverpool; Scarborough; not recorded from the 

 Northumberland and Durham district ; Scotland, taken probably at Duddingstone 

 L >ch, in the Forth district, but recorded with some reserve by Dr. Sharp, who says 

 he does not know what has become of the specimens (Scot. Nat. xxxvi. 189). Ireland, 

 near Dublin. 



BAGOINA. 



The members of this tribe are very closely allied to the Erirrhinina, 

 and they have, by many authors, been included with them ; they differ 

 chiefly in their habits, which are, in all the species, aquatic or sub- 

 aquatic ; they are extremely sluggish and have no power of swimming 

 like the aquatic Ceuthorrhynchina (Eubrychius arid Litodactylui) ; 

 their only means of locomotion in water, therefore, is to cast themselves 

 free from their plants, like the Helophori, and allow the current to 

 carry them ; the chief character of the tribe lies in the tarsi, which have 

 the third joint long, or comparatively long, behind the ouychium, and 



