Citronella Ant
Scientific Name: Lasius interjectus
Order & Family: Hymenoptera: Formicidae
Size: 3mm to 4.5mm (workers)

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