502 CLAVICORNIA — DERMESTIDAE. 



Head small, inllexed beneath thorax but not covered by 

 prosterniun. Ligula broad, horizontal. Mesosternum nar- 

 row; posterior coxae rapidly narrowed outward; tibiae 

 with fine spines on outer- side ; first four tarsal joints 

 equally short. Club of antennae with three joints, shallow 

 grooves for its reception on under-side of thorax. 



Dermcstcs, Lin. 

 H, Forehead with one ocellum. 



a, Mesosternum narrow ; intermediate legs placed near 

 each other. 



Club of antennae with three joints ; ligula horizontal. 



I. Mouth free. 



Shallow grooves for reception of antennae beneath head 

 but none Ijeneath thorax. Posterior coxae gradually 

 strongly narrowed outward ; tibiae with spines on outer- 

 side, one of the apical spines more or less prolonged ; first 

 tarsal joint short and closely attached to the elongate 

 second joint. Attagenus, Lixtr. 



II, Mouth covered by prosternum. 



Deep grooves for reception of antennae beneath head, 

 wide shallow ones beneath thorax. Posterior coxae nar- 

 row, gradually slightly reduced outward; tibiae without 

 spines on outer-side, apical spines very fine, first four tarsal 

 joints diminishing in length. Meyatoma, Herbst, 



b. Mesosternum broad; intermediate legs placed far apart. 



I. Prosternum leaving labrum and mandibles free. 



Club of antennae composed of three joints, received by 

 deep grooves beneath thorax. Posterior coxae almost equal 

 in breadth throughout; tibiae fitting into grooves in femora; 

 first four tarsal joints diminishing in length. 



Tiresias, Steph. 



II, Prosternum leaving labrum only free. 



1, Deep grooves for reception of antennae in side 

 margin of thorax. 



Posterior coxae equally broad throughout, reaching out- 

 ward to inner margin of episterna only ; tibiae fitting into 

 grooves in femora, first four tarsal joints equally short. 

 Scutellum covered ; body thickly covered with scales. 



Anthrenus, Geoff'r. 



2, No grooves for reception of antennae. 



