SCOLYTIDES. 93 



Eyes finely granulate; pronotum not separate from sides 

 of prothorax ; metasternum more or less long, its episterna 

 narrow. 



I, Club of antennae solid ; third tarsal joint entire. 



Mentum elongate, gradually dilated and cut obliquely 

 on each side in front; ligula commencing near apex of 

 mentum ; first joint of labial palpi larger than second ; 

 funiculus of antennae with five joints, club solid, short 

 oval ; eyes nearly divided ; first three tarsal joints equal, 

 third entire, not broader than second ; intermediate abdo- 

 minal segments very short, equal. Polygraphus, Er. 



II, Club of antennae distinctly articulate ; third 

 tarsal joint emarginate or bilobed. 



1, Club of antennae elongate. 



A A, Funiculus of antennae with five joints, 

 club formed of three joints, loosely united. 



Mentum elongate, gradually dilated and angular in 

 middle of front; ligula commencing before middle of men- 

 tum ; labial palpi longer than maxillary, first joint longer 

 than second ; first and second tarsal joints nearly equal, 

 third a little dilated, bilobed. Phlocophthorus, Woll. 



2? J?. Funiculus of antennae with seven joints, 

 club formed of four joints, closely united. 



Mentum broad, heartshaped, very narrow at base, angu- 

 lar in middle of front; ligula commencing at some distance 

 from base of mentum ; first joint of labial palpi longer 

 than second and third together ; anterior coxae placed 

 slightly apart ; first tarsal joint a little longer than second, 

 third dilated, l)ilobed ; second abdominal segment almost 

 as long as next two together ; metathoracic episterna 

 tolerably broad. Hylesimts, Fab. 



€ C. Funiculus of antennae with six joints; club 

 formed of four joints, closely united. 



Mentum rotundate ovate at base ; third tarsal joint dis- 

 tinctly bilobed. Cissophagus, Chap. 



2. Clul) of antennae oval or nearly globular, 

 formed of four joints, closely united. 



Anterior coxae close together. 



A A, Funiculus of antennae with five joints. 



