Rosner’s hairstreak

Dion Manastyrski Centre de foresterie du Pacifique, Victoria (Colombie-Britannique) / Pacific Forestry Centre, Victoria, British Columbia

Scientific name: Callophrys grynea rosneri (Johnson)
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera
Family: Lycaenidae

Distribution

British Columbia

This species is distributed throughout the host range in British Columbia south of 51⁰ latitude; it also occurs south to Oregon.

Damage, symptoms and biology

Rosner’s hairstreak is a rather uncommon innocuous solitary defoliator.

Mature larva up to 15 mm long. Head, green unmarked; body velvet green with cream to yellowish white subdorsal and subspiracular stripes. Body and head covered with short fine hairs.

This species overwinters in the pupal stage. Adults emerge from May to early June; females lay eggs near branch tips. Larvae are present from June to July; pupation occurs from late July to August.