Tribe Hylesinini
Tribe Scolytini
Hylesines:
1) raised edge along the anterior margin of the elytra that is armed with a series of crenulations (teeth) and ...
2) head is usually visible when viewed from above.
Scolytines:
1) smooth or rounded anterior margin of the elytra, and ...
2) head is largely or entirely concealed below the pronotum when viewed from above.