THE CANADIAN ENTOMOLOGIST. 243 



smaller than the first ; no siibapical tooth within ; hind margins of 

 dorsal abdominal segments 7iot distinctly depressed ; pygidial area 

 in $ clothed with shorter hair and stiff bristles towards apex ; dorsal 

 segments thickly tomentose, or at least with a fine pubescence ; 

 metanotum not emarginate behind ; hind tibiae longly ridged be- 

 hind ; front tibiae outwardly usually spinous Liris, Fabr. 



8. Mandibles without a tooth within ; pygidial area in 9 bare, without 



stiff bristles, at most with a very fine pubescence at apex only ; hind 



tibias behind not ridged, or the ridge scarcely indicated lo. 



Mandibles tvith one or two teeth within before the middle, near the 

 base ; pygidial area with stiff bristles, usually indistinct at apex ; 

 lateral margins of the pygidium convergent behind ; front tarsal comb 

 with stiff spines 9. 



9. Metanotum longer than the mesonotum ; jiygidial area clothed with a 



silvery jjubescence ; anterior femora in ^ uot marginate near the 



base Notogonia, Costa. 



Metanotum shorter than the mesonotum ; pygidial area bare towards 

 the base, but with short, stiff hairs at apex ; anterior femora in ^ 

 emarginate near the base Ancistromma, Fox. 



10. Claws not unusually long, simple; front femora either toothed or 



simple ; lateral ridges of the pygidial area ( $ ) feebly curved, not 

 distinctly convergent ; ventral plate of the second abdominal seg- 

 ment without deplanate places ; punctuation of the head and thorax 

 distinct, proportionately not fine ; abdomen in J usually densely 

 punctured, with or without a pygidial area; mesosternal suture 



wanting Larra, Fabr. 



Claws unusually long, with a median tooth ; pronotum only slightly 

 impressed beneath the apex of the mesonotum, more towards the 

 sides than medially ; front femora without a tooth ; pygidial area 

 with the lateral margins parallel or, in only a few cases, convergent 

 posteriorly ; ventral plate of the second abdominal segment with 

 two deplanated places at the base, which are separated by a keel- 

 like elevation : abdomen in ■? shining, with the margin of the seg- 

 ments slightly tomentose ; legs rather stout ; $ with the claws 

 simple, the mesosternal suture distinct posteriorly.. ..Motes, Kohl. 

 I r. Face medially without a swelling, at the most with two small tubercles 

 above the base of the antennas ; legs unusually stout ; abdomen not 

 coarsely punctured ; second dorsal segments not margined at 

 sides 12, 



