.EACTMUS, Thomson. 
'1° the second. Posterio. femora gUbro.s, and .hu.»g beneath. 
P ^neus the single species of this genus, has usual y been assoei- 
lirS^^roMu.! but, independently of its g.e»t d.s,n.Jan y ,n 
Tt is distinguished from that genus by some evident struetu-al 
als- among these may be mentioned its mueb less developed 
and its glabrous posterior femora. In general appearance . 
■sir the' next gen'us, A....na, from which it ts d.sfngu.sbed 
ts cariuated mesosternnm, and glabrous posterior femora. 
^KAC^N.i, Thomson. _ 
Orac„nve.and.nh.he».phe.c,o.oh,on...».— ^^^ 
ng>y ^P'— ■ «"".'7 rr2'ortHt".f,„i„t stoat, nearly a, long 
This ^enus has also hitherto been associated with BydroUu. but m 
tin™ s d n'ependeutly of its small si.e, by its "— ^d me^o- 
r„nd much less developed maxillary and labial palp.. We 
::T;2ve«'ee species Jthis country; and, a. they have been 
wtee so fir as I know, sufaciently described, I gtve below the 
aracters which distinguish them. 
4 „,n„nLn3 Payk. Suh-hemispUrlms, niger, potloraj^U elytro- 
™X spec.es is larger, broader, and more -vex than the foUo^ng, 
,ud has the elytra always of a darker colour, except at the margms, 
,nd the tarsi are stouter. 
, A viEi«iL,s. Suhovalis, cmve^us, cai»te nigro, tc^lfis piods, arti- 
.7.7 Lonci. it — is "'*• 
piceo-rufis, tarsts gracilibus. 
Var. capite uirinque macula ^arva ante oados rufo-testacea. 
Common in England, rare in Scotland. 
