48 MALACODEEMA — CYPHONIDAE. 



CYBHOWIJDAE. 



A, Posterior femora only moderately thickened ; posterior 



tibiae with feeble apical spines. 



a. Mandibles curved, sharp at apex. 



I, Joints of antennae long, cylindrical. 



1, First joint of posterior tarsi strongly elongate, 

 second produced at inner angle. 



Second and third joints of antennae small, about equal in 

 length ; labial palpi forked. Thorax twice or rather more 

 than twice as broad as long, anterior margin rounded. 



Helodes, Latr. 



2, First joint of posterior tarsi moderately long, 

 second simple. 



Third joint of antennae longer than second ; labial palpi 

 forked, third joint not thickened toward apex. Thorax 

 rather more than twice as broad as long, anterior margin 

 flatly rounded. Microcara, Th. 



II, Joints of antennae reversed conical. 



Third joint of antennae longer than second ; labial palpi 

 simple ; first tarsal joint somewhat elongate. Thorax three 

 or four times as broad as long, anterior margin sinuate on 

 each side. Cyplion, Payk. 



III, Joints of antennae saw-like. 



Second and third joints of antennae very small, third 

 shorter than second ; labial palpi forked ; first tarsal joint 

 elongate. Thorax three times as broad as long, anterior 

 margin sinuate on each side. Prionocyplion, Eedt. 



h. Mandibles triangular, blunt at apex. 



Joints of antennae cylindrical, first two large and thick, 

 third much thinner and shorter than second ; labial palpi 

 simple ; first tarsal joint elongate. Thorax three times as 

 broad as long, anterior margin sinuate on each side. 



Hydrocyplion, Eedt. 



H, Posterior femora much dilated; posterior tibiae with 

 one of the apical spines very long. 



Joints of antennae cylindrical, third longer than second ; 

 mandibles triangular, blunt at apex; labial palpi forked; 

 first tarsal joint strongly elongate. Thorax three times as 



