DYSCHIRIUS, Bon. 



Contains species of small size, shining, often bronzed. They live in wet 

 places on banks and shores, where they dig holes. 



Synoptic table revised by Dr. J. L. Leconte. 



Elytra with 3d stria or interspace tripunctate. 



Epistoma bisinuate ; basal stria of elytra entire. 

 Clypeus tridentate. 



Antennae black, thorax globose. 1. tridentatus. 



Clypens with middle, tooth obsolete, the lateral acute. 



Antennae and legs very black. 2. patruelis. 



Base of antennae and posterior legs rufous. 3. basalis. 



Epistoma broadly emarginate, bidentate ; basal stria 

 of elytra wanting. 

 Front with slight or scarcely visible transverse impression. 

 Elytral striae posteriorly distinct. 



Thorax subtransverse, legs blackish. 4. integer. 



Thorax smaller, globose, legs black. 5. nigripes. 



Thorax smaller, globose legs black ; elytral stria? 



strongly punctate. 6. consobrinus. 



Thorax globose, elytra with feeble, more sparsely 

 punctured striae, impressed behind 

 the base. 7. gibbipennis. 



Thorax globose, elytra with deeply impressed slightly 

 punctured striae, interrupted before and 

 behind the middle, forming two transverse 

 smooth bands. 8. laevifasciatus, 



Front with deep transverse impression. 

 Elytral striae very coarsely punctured in front, 

 extending to base, not obliterated 

 behind. 9. Dejeani. 



Elytral striae extending to base, obliterated behind. 



Thorax globose. 

 Elytral striae feeble ; antennae and legs black. 10. aeneolus. 

 Elytral striae stronger ; base of antennae 



and legs rufous. 11. longulus. 



Thorax transverse ovate, antennae and legs 



rufous. 12. globulosus. 



Elytra striae abbreviated anteriorly ; antennae, 

 legs and tip of elytra rufous. 

 Elytral striae obliterated behind. 

 Thorax transverse ovate, elytraFstriae 



strongly punctate. 13. haemorrhoidalis. 



Thorax quadrate globose elytral striae 



feebly punctate. 14. terminatus. 



Elytral striae not obliterated behind. 

 Thorax quadrate globose, elytral striae strongly 



punctate. 15. analis. 



