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Species Banksiola crotchi

caddisfly - Banksiola crotchi Giant Casemaker - Banksiola crotchi caddisfly - Banksiola crotchi Banksiola? - Banksiola crotchi Banksiola crotchi  - Banksiola crotchi Banksiola crotchi - male Banksiola crotchi - male Banksiola crotchi - female
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Trichoptera (Caddisflies)
Suborder Integripalpia
Infraorder Plenitentoria
Superfamily Phryganeoidea
Family Phryganeidae (Giant Casemakers)
Genus Banksiola
Species crotchi (Banksiola crotchi)
Other Common Names
Traveler Sedge Giant Casemaker
Synonyms and other taxonomic changes
Banksiola selina
Females 14 to 20 mm long
Males 12 to 15 mm long.
Head: Brown. Eyes large and dark. Whiskers (palpi) are short; 4 segments on male and 3 segments on females.
Antenna: Thick, as long as body and have even bands of dark and light rings.
Thorax: Brown, slightly hairy.
Wings: Background is cream-color with fine dark brown net-like marks and dark blotches. The blotches can vary significantly.
Legs: Brownish-yellow, short yellowish bristles and black spines.
Abdomen: Dark yellowish brown, lighter on underside.
Transcontinental in Canada. Northern and western U.S. from Maine to Illinois, west to Montana, Oregon, Utah, California and New Mexico.
Standing waters, ponds and marshes. Adults are attracted to lights.
May to August in south; June and July in north.
Larvae feed on plants and later on smaller insects.
Life Cycle
Larvae hatch out during August and September, building cases from pieces of plant material and algae, arranged in a spiral around their body. Generally feeding on algae, by the 5th instar they start to feed on smaller insects. Over-winter as mature larvae; pupate in spring. Adults emerge at dusk, and walk or swim on the water, sometimes in circles before they head for shore and flight. One generation per year.
Holotype as Banksiola crotchi male by Banks, 1943. MCZ #25956. Locality: Victoria, Vancouver Island, British Columbia, Canada collected by G. R. Crotch. In the Museum of Comparative Zoology, New York.
Holotype as Banksiola selina male by Betten, 1944. Locality: Zion, Illinois, along Dead River: June 3, 1938, collected by Mohr & Burks. In Illinois Natural History Survey, Champaign, Ill. Also allotype female.
See Also
Banksiola dossuaria has a more orangish color, especially on head. Antenna are not ringed light and dark. Blotches on wings are much larger, and wings have no net-like marks.
Print References
Wiggins, G.B. 1956. A revision of the North American caddisfly genus Banksiola (Trichoptera : Phryganeidae) Contributions of the Royal Ontario Museum, Division of Zoology and Palaeontology. 43: 7 (includes description and illustrations of both male and female genitalia)
Internet References
Psyche, 1943, Vol. 50, pp. 80 to 81 by Banks.
Illinois Natural History Survey, 1944-45, Vol. 23, pp. 169 to 171.
Contributions of the Royal Ontario Museum Division of Zoology and Paleontology, 1956, #43: A Revision of the North American Caddisfly Genus Banksiola by Wiggins.
Illinois Natural History Survey, 1979-81, Vol. 32, pg. 98.