TENEBEIONIDAE. 323 



apical spines very sliort or absent ; metasternum elongate ; 

 intercoxal process rather narrow, triangular. 



Bolito'phagus, 111. 



2. Eyes not completely divided ; sides of thorax 

 not notched. 



Head very short, sunk in thorax to eyes ; last joint of 

 maxillary palpi nearly cylindrical ; mandibles bifid at 

 apex ; cheeks slightly more prominent than eyes ; thorax 

 strongly transverse, not or scarcely emarginate in front ; 

 tibiae simple, apical spines very short or absent ; meta- 

 sternum elongate ; intercoxal process rather narrow tri- 

 angular. Heledona, Latr. 



II» Head without transverse furrow. 



1, Eyes more prominent than cheeks ; intermediate 

 coxae with trochantina; apical spines of tibiae 

 indistinct. , 



A A, First joint of posterior tarsi short. 



Head sunk in thorax; last joint of maxillary palpi 

 elongate, slightly depressed and rounded at apex ; man- 

 dibles bifid at apex ; eyes emarginate ; tibiae slightly and 

 gradually dilated ; metasternum elongate ; intercoxal process 

 short, triangular. Diaper is, Geoffr. 



2? 2?. First joint of posterior tarsi elongate. 



a a. Intercoxal process broad, nearly parallel- 

 sided. 



Head sunk in thorax ; last joint of maxillary palpi 

 elongate ; mandibles bifid at apex ; eyes emarginate ; tibiae 

 slightly and gradually dilated ; metasternum elongate. 



Scaphidema, Eedt. 



h b, Intercoxal process narrow, triangular. 



A a. Last joint of maxillary palpi tri- 

 angular, nearly equilateral. 



Head sunk in thorax ; mandibles bifid at apex ; eyes 

 emarginate ; tibiae slightly and gradually dilated, meta- 

 ternum elongate. Platydema, Lap. 



B h. Last joint of maxillary palpi elongate 

 triangular. 



Head sunk in thorax ; mandibles bifid at apex ; eyes 



Y 2 



