Antmen (half man, half ant) are predatory and appear in groups in chasms. Any military dwarf can deal with one or two, but since they're found in groups of 5 to 7, it's advisable to sport a decently-sized military when engaging. They bleed white ichor, and the raws also suggest they attack as a group.
Perhaps contrary to their name, all antmen are female. Also, despite being insectoid, their corpses will rot to yield bones and a skull.
[CREATURE:ANTMAN] [NAME:antman:antmen:antman] [TILE:'a'][COLOR:0:0:1] [LARGE_ROAMING] [BIOME:SUBTERRANEAN_CHASM] [FREQUENCY:100] [GENPOWER:4] [BLOODTYPE:W] [CAN_LEARN][CAN_SPEAK] [CANOPENDOORS] [POPULATION_NUMBER:15:30] [CLUSTER_NUMBER:5:7] [LARGE_PREDATOR] [PREFSTRING:mystery] [BODY:HUMANOID_4ARMS:2EYES:HEART:GUTS:BRAIN:MOUTH] [BODYGLOSS:INSECT_UPPERBODY:INSECT_LOWERBODY] [SIZE:4] [MAXAGE:3:4] [ATTACK:MAIN:BYTYPE:GRASP:punch:punches:1:2:BLUDGEON][ATTACKFLAG_WITH] [ATTACK:SECOND:BYTYPE:MOUTH:bite:bites:1:2:GORE][ATTACKFLAG_CANLATCH] [FEATURE_ATTACK_GROUP] [NO_SLEEP] [EQUIPS] [FAT:1] [ALL_ACTIVE] [FEMALE] [HOMEOTHERM:10040] [STANDARD_FLESH]