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For Insects, Spiders & Their Kin
For the United States & Canada
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Species Boreus nivoriundus - Snow-born Boreus

Snow Scorpionfly - Boreus nivoriundus - male Snow Scorpionfly - Boreus nivoriundus - male Snow-born Boreus - Boreus nivoriundus - male Snow-born Boreus - Boreus nivoriundus - male Boreus nivoriundus - female Snow-born Boreus - male - Boreus nivoriundus - male Boreus nivoriundus? - Boreus nivoriundus - male female Boreus nivoriundus - Boreus nivoriundus - female
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Mecoptera (Scorpionflies, Hangingflies, and Allies)
Family Boreidae (Snow Scorpionflies)
Genus Boreus
Species nivoriundus (Snow-born Boreus)
Explanation of Names
Boreus nivoriundus Fitch 1847
NIVORIUNDUS: from the Latin "nivis" (snow) + "origo" (origin or beginning);
the common name given by Fitch (1847) because the insects suddenly appeared in numbers after an overnight snowfall and seemed to be "bred from the snow"
3-5 mm
Adapted from Asa Fitch's original 1847 description:
head, eyes, antennae black; rostrum brown with black tip; side of thorax black; top of thorax varying from brown to cinnamon except basal half of prothorax black; abdomen varies from black to brown, with terminal segment brown or cinnamon; ovipositor brown or reddish with black tip; rudimentary wings brown or cinnamon; legs yellow or brown with thin black ring at each joint.
B. brumalis (Mid-winter Boreus), the only other eastern species, is colored differently: legs, antennae, eyes, rostrum dull black; abdomen shiny blackish-green with light brown lateral stripes; ovipositor shiny black; rudimentary wings in male brownish-black; in female, the tiny wingpads are barely visible as two minute grayish-black spots on the thorax
NB-QC to NY-OH-TN(1) (probably also occurs in adjacent areas)
on surface of snow, at high elevation in southern part of range
adults found on snow from December to April
Larvae and adults feed on mosses. In New England, utilizes Atrichum spp., Polytrichum commune and P. ohioense moss.(2)
Print References
Fitch A. (1847) Winter insects of eastern New York. American Journal of Agricultural and Biological Sciences 5: 274-284.