32 STERNOXI — ELA.TERIDAE. 



II, Under-side of thorax with no traces of grooves 

 for reception of antennae. 



1, Scutellum oval or roundish quadrangular ; 

 sternal spine moderately long, thin. 



A A, First joint of antennae only moderately large. 



Head bent downward, forehead projecting over labrum ; 

 seams beneath thorax double ; tarsi elongate, first nearly as 

 long as next two together. Megapenthes, Kies. 



2? J5. First joint of antennae large. 



Head only slightly bent downward, forehead raised 

 above labrum; tarsi bristly, first joint somewhat longer 

 than second. Cryptohypnus, Germ. 



2, Scutellum heartshaped ; sternal spine short and 

 thick. 



Third joint of antennae rather longer than second and 

 about as long as fourth; head somewhat bent downward, 

 forehead projecting over labrum. Cardiophorus, Esch. 



6. Posterior coxae gradually narrowed outward. 



I, Head considerably sunk in thorax ; eyes not 

 strongly convex. 



1, Last joint of maxillary palpi more or less 

 hatchet-shaped. 



A A. Third tarsal joint without large mem- 

 bianous appendage. 



a fi» Tarsal claws comblike. 



Second and third joints of antennae small ; forehead 

 projecting above labrum ; seams beneath tliorax double in 

 front ; tarsi strong, bristly, simple. Ifelanottis, Esch. 



b b. Tarsal claws simple. 



A (I. Lower part of forehead and labrum only 

 moderately deflexed, mouth in front of head. 



A 1, Under-side of thorax with distinct 

 traces of grooves for reception of an- 

 tennae. 

 Tarsi strong, simple. Limonius, Escli. 



H 2, Under-side of thorax without any 



distinct traces of grooves for reception of 



antennae. 



