Winter-swarming
Guides
Lasius claviger
smaller yellow ant, common citronella ant, yellow ant, lemon ant, citronella ant
Lasius claviger, commonly known as the smaller yellow ant or citronella ant, is a North American ant species described by Roger in 1862. Formerly classified in the genus (now subgenus) Acanthomyops, it belongs to the genus Lasius. The species is notable for producing a distinctive lemony citronellal scent from glands near its jaws when disturbed, and for its habit of tending root-feeding aphids for honeydew. Winged reproductive forms swarm in late autumn and early winter, often causing concern when mistaken for termites.
Lasius interjectus
Larger Yellow Ant, Larger Citronella Ant, Citronella Ant
Lasius interjectus, commonly known as the larger yellow ant or larger citronella ant, is a North American ant species distinguished by its yellowish coloration and distinctive lemon-citronella scent. Formerly classified in the genus Acanthomyops (now a subgenus of Lasius), this species nests in soil, often along building foundations, and is known for producing alate swarms that sometimes emerge indoors. The species poses no structural threat to buildings and is recognized by its chemical defense using citronellal and formic acid.