Citronella Ant

Scientific Name: Lasius interjectus

Order & Family: Hymenoptera: Formicidae

Size: 3mm to 4.5mm (workers)

Citronella Ant

Natural Habitat

Underground in soil, often under rocks, logs, or near foundations

Diet & Feeding

Honeydew secreted by aphids and mealybugs that live on plant roots

Behavior Patterns

Nocturnal and subterranean; they emit a distinct lemon or citronella odor when crushed or threatened. They are known for tending underground 'herds' of root-feeding insects.

Risks & Benefits

Generally harmless to humans and structures; they do not sting or forage in kitchens. They provide ecosystem benefits through soil aeration, though they can occasionally be considered a nuisance when swarming indoors.

Identified on: 3/18/2026