INUADITINU NOUTll AMERICA. 1)5 



Genus Colymbetes. ClabtUle. 



Antenna longer than the head, setaceous ; scutel distinct ; 

 basal joints of the four anterior tarsi of the male almost 

 equally dilated, not patelliform ; palpi filifornK 



Species. 



1. E. *eriftro])terus black ; elytra dark reddish-brown, mar- 

 gin and base paler ; feet towards the tips piceous ; body 

 rounded behind. 



Length not quite two-fifths of an inch. 



Dytisats erytroplerus. MeUh. Calal. 



Body black, above divided by minute lines into minute, ir- 

 regular, longitudinal, or suborbicular spaces. 

 Head black, two indistinct piceous spots on the vertex, and 

 an abbreviated line and puncture on the front each side ; 

 antennw and palpi rufous. 

 Thorax black, dorsal line abbreviated, obsolete, lateral edge 



arquated ; scutel black, plain. 

 Elytra reddish-brown, darker on the posterior disk, inmia- 

 culate, exterior margin and base paler, rounded behind, 

 inflected margin l)lack. 

 Pectus and postpectus black ; sternum acutely carinated ; feet 

 piceous, middle of tlie thighs black, nails of the anterior 

 pair in one sex dilated in the middle and compressed ; 

 venter black, segments piceous at tip. 

 Rather less convex than the succeeding species, and some- 

 what more dilated. The colour of the head and thorax is 

 manifestly distinct from that of the elytra, and forms a good 

 specific character. 



•i. C. *fenestralis black, sliglitly bronzed ; elytra four spotted, 

 anterior spots obsolete, terminal ones distinct, beneath 

 piccous-black. 



Length two-fillhs of an inch. 



