TENEIJRIONIDAE. 



581 



peduncle distinct; untennte 11-jointed, more or less thickened 

 externally, perfoliate. Elytra with narrow epipieura'. Anterior 

 00X33 siibtransverse ; middle coxaj inclosed by the sterna, without 

 trochautin; hind eoxa^ slightly t^eparated ; intercoxal process of 

 the abdomen triangular; legs moderate; tibiae son)etimes dilated ; 

 tibial spurs distinct; tarsi pubescent beneath, the last joint much 

 elongated. The hind margin of the third and fourth ventral 

 segments is subcoriaceous. 



The species are found under bark; a lew also infest articles of 

 commerce. 



Our genera may be thus arranged : — 



Antennae with last two or three joints suddenly broader. 2. 



Antennae gradually broader to tip. 3. 



2. Eyes nearly divided ; 



Epipleur;e very narrow at tip; ehib 3-iointed. Tribolium. 



Epipleurae distinct at tip ; club 2-jointed. Dicedus. 



Eyes entire ; antennal clul) 3-jointed. Phthora. 



3. Base of thorax not margined. 4. 

 Base of thorax margined. 11. 



4. Head of male either tuberculate or horned ; last joint of maxillary 



palpi oval. Ti. 



Head of male not tubi'rculate ; last joint of niaxillary palpi tri- 



angnlar. 6. 



5. Head of male tuberculate ; 



Mandibles above broad, no vertical tooth. 



Mandibles shnider, with a vertical tooth. 

 Head of male with two long horns. 

 a. Epipleurse entir<?. 



Epipleurae abbreviated. 



7. Anterior tibiae slender. 

 Anterior tibiae more or less dilated. 



8. Head of male bituberciilate ; femora niutic. 

 Head of mah; simple ; femora toothed. 



'.). Prosternuni pi'olonged, mesosternum deeply emarginat 



Gnathocerus. 



Echocerus. 



Evoplus. 



7. 



lU. 



8. 



9. 



Ulosonia. 



Merotemnus. 



Mycotrogus. 



I'rost(^rnuni not prolonged, mesostei-num slightly concave ; 

 Front tibia^ not denticulate; last joint of antenn;c tiiuu'ate. 



Aphanotiis. 

 Front til)ia^ fniely denticulate; last joint oval. Alphitobius. 



10. Anterior tibije shnider ; 



First joint of hind tarsi long. Cynaeus. 



First joint of hind tarsi short. Metaclisa. 



Anterior tibiae broad, serrate. Uloma. 



11. Anterior tittiie. slightlv dilated, tinelv denticulate. Eutochia. 



